parent
c0595f3ef9
commit
52762bd4a1
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import {Connection, ConnectionNotReadyError} from './Connection'
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import {Logging} from '../../service/Logging'
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import {Inject} from '../../di'
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import {open, Database} from 'sqlite'
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import {FieldType, QueryResult, QueryRow} from '../types'
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import {Schema} from '../schema/Schema'
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import {Awaitable, collect, Collection, hasOwnProperty, UniversalPath} from '../../util'
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import {SQLDialect} from '../dialect/SQLDialect'
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import {SQLiteDialect} from '../dialect/SQLiteDialect'
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import {SQLiteSchema} from '../schema/SQLiteSchema'
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import * as sqlite3 from 'sqlite3'
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import {ModelField} from '../model/Field'
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export interface SQLiteConnectionConfig {
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filename: string,
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}
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export class SQLiteConnection extends Connection {
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@Inject()
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protected readonly logging!: Logging
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protected client?: Database
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public dialect(): SQLDialect {
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return this.make(SQLiteDialect)
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}
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public async init(): Promise<void> {
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if ( this.config?.filename instanceof UniversalPath ) {
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this.config.filename = this.config.filename.toLocal
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}
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this.logging.debug(`Opening SQLite connection ${this.name} (${this.config?.filename})...`)
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this.client = await open({
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...this.config,
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driver: sqlite3.Database,
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})
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}
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public async close(): Promise<void> {
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this.logging.debug(`Closing SQLite connection ${this.name}...`)
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if ( this.client ) {
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await this.client.close()
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}
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}
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public async query(query: string): Promise<QueryResult> {
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if ( !this.client ) {
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throw new ConnectionNotReadyError(this.name, {
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config: this.config,
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})
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}
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this.logging.verbose(`Executing query in connection ${this.name}: \n${query.split('\n').map(x => ' ' + x)
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.join('\n')}`)
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try {
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const result = await this.client.all(query) // FIXME: this probably won't work for non-select statements?
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await this.queryExecuted(query)
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return {
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rows: collect(result),
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rowCount: result.length,
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}
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} catch (e) {
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if ( e instanceof Error ) {
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throw this.app().errorWrapContext(e, {
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query,
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connection: this.name,
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})
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}
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throw e
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}
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}
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public async asTransaction<T>(closure: () => Awaitable<T>): Promise<T> {
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if ( !this.client ) {
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throw new ConnectionNotReadyError(this.name, {
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config: this.config,
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})
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}
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// fixme: sqlite doesn't support tx's properly in node atm
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await this.client.run('BEGIN')
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try {
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const result = await closure()
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await this.client.run('COMMIT')
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return result
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} catch (e) {
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await this.client.run('ROLLBACK')
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if ( e instanceof Error ) {
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throw this.app().errorWrapContext(e, {
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connection: this.name,
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})
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}
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throw e
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}
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}
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public normalizeRow(row: QueryRow, fields: Collection<ModelField>): QueryRow {
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fields.where('type', '=', FieldType.json)
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.pluck('databaseKey')
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.filter(key => hasOwnProperty(row, key))
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.filter(key => typeof row[key] === 'string')
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.each(key => row[key] = JSON.parse(row[key]))
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return row
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}
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public schema(): Schema {
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return new SQLiteSchema(this)
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}
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}
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@ -0,0 +1,617 @@
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import {EscapeValue, QuerySafeValue, raw, SQLDialect} from './SQLDialect'
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import {Collection, ErrorWithContext, Maybe} from '../../util'
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import {AbstractBuilder} from '../builder/AbstractBuilder'
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import {
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Constraint,
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FieldType,
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inverseFieldType,
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isConstraintGroup,
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isConstraintItem,
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QuerySource,
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SpecifiedField,
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} from '../types'
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import {ColumnBuilder, ConstraintBuilder, ConstraintType, IndexBuilder, TableBuilder} from '../schema/TableBuilder'
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export class SQLiteDialect extends SQLDialect {
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public escape(value: EscapeValue): QuerySafeValue {
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if ( value instanceof QuerySafeValue ) {
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return value
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} else if ( Array.isArray(value) || value instanceof Collection ) {
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return new QuerySafeValue(value, `(${value.map(v => this.escape(v)).join(',')})`)
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} else if ( String(value).toLowerCase() === 'true' || value === true ) {
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return new QuerySafeValue(value, 'TRUE')
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} else if ( String(value).toLowerCase() === 'false' || value === false ) {
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return new QuerySafeValue(value, 'FALSE')
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} else if ( typeof value === 'number' ) {
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return new QuerySafeValue(value, `${value}`)
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} else if ( value instanceof Date ) {
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const pad = (val: number) => val < 10 ? `0${val}` : `${val}`
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const [y, m, d, h, i, s] = [
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`${value.getFullYear()}`,
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`${pad(value.getMonth() + 1)}`,
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`${pad(value.getDate())}`,
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`${pad(value.getHours())}`,
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`${pad(value.getMinutes())}`,
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`${pad(value.getSeconds())}`,
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]
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return new QuerySafeValue(value, `'${y}-${m}-${d} ${h}:${i}:${s}'`)
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} else if ( value === null || typeof value === 'undefined' ) {
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return new QuerySafeValue(value, 'NULL')
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} else if ( !isNaN(Number(value)) ) {
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return new QuerySafeValue(value, String(Number(value)))
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} else {
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const escaped = value.replace(/'/g, '\'\'')
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return new QuerySafeValue(value, `'${escaped}'`)
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}
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}
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public renderQuerySource(source: QuerySource): string {
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if ( source instanceof QuerySafeValue ) {
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return String(source)
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} else if ( typeof source === 'string' ) {
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return source.replace(/"/g, '""')
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.split('.')
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.map(x => '"' + x + '"')
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.join('.')
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}
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return `${this.renderQuerySource(source.table)} AS "${source.alias.replace(/"/g, '""')}"`
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}
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public renderCount(query: string): string {
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return [
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'SELECT COUNT(*) AS "extollo_render_count"',
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'FROM (',
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...query.split('\n').map(x => ` ${x}`),
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') AS extollo_target_query',
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].join('\n')
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}
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public renderRangedSelect(query: string, start: number, end: number): string {
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return [
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'SELECT *',
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'FROM (',
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...query.split('\n').map(x => ` ${x}`),
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') AS extollo_target_query',
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`LIMIT ${start === end ? ((end - start) + 1) : (end - start)} OFFSET ${start}`,
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].join('\n')
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}
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/** Render the fields from the builder class to PostgreSQL syntax. */
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protected renderFields(builder: AbstractBuilder<any>): string[] {
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return builder.appliedFields.map((field: SpecifiedField) => {
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let columnString: string
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if ( typeof field === 'string' ) {
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columnString = field.split('.').map(x => `"${x}"`)
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.join('.')
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} else if ( field instanceof QuerySafeValue ) {
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columnString = field.toString()
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} else if ( typeof field.field === 'string' ) {
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columnString = field.field.split('.').map(x => `"${x}"`)
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.join('.')
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} else {
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columnString = field.field.toString()
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}
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let aliasString = ''
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if ( typeof field !== 'string' && !(field instanceof QuerySafeValue) ) {
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aliasString = ` AS "${field.alias}"`
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}
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return `${columnString}${aliasString}`
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})
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}
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public renderSelect(builder: AbstractBuilder<any>): string {
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const rawSql = builder.appliedRawSql
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if ( rawSql ) {
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return rawSql
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}
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const indent = (item: string, level = 1) => Array(level + 1).fill('')
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.join(' ') + item
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const queryLines = [
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`SELECT${builder.appliedDistinction ? ' DISTINCT' : ''}`,
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]
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// Add fields
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// FIXME error if no fields
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const fields = this.renderFields(builder).map(x => indent(x))
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.join(',\n')
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queryLines.push(fields)
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// Add table source
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// FIXME error if no source
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const source = builder.querySource
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if ( source ) {
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queryLines.push('FROM ' + this.renderQuerySource(source))
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}
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// Add constraints
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const wheres = this.renderConstraints(builder.appliedConstraints)
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if ( wheres.trim() ) {
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queryLines.push('WHERE')
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queryLines.push(wheres)
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}
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// Add group by
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if ( builder.appliedGroupings?.length ) {
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const grouping = builder.appliedGroupings.map(group => {
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return indent(group.split('.').map(x => `"${x}"`)
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.join('.'))
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}).join(',\n')
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queryLines.push('GROUP BY')
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queryLines.push(grouping)
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}
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// Add order by
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if ( builder.appliedOrder?.length ) {
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const ordering = builder.appliedOrder.map(x => indent(`${x.field.split('.').map(y => '"' + y + '"')
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.join('.')} ${x.direction}`)).join(',\n')
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queryLines.push('ORDER BY')
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queryLines.push(ordering)
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}
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// Add limit/offset
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const pagination = builder.appliedPagination
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if ( pagination.take ) {
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queryLines.push(`LIMIT ${pagination.take}${pagination.skip ? ' OFFSET ' + pagination.skip : ''}`)
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} else if ( pagination.skip ) {
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queryLines.push(`LIMIT -1 OFFSET ${pagination.skip}`)
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}
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return queryLines.join('\n')
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}
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public renderBatchUpdate(): string {
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throw new ErrorWithContext('SQLite dialect does not support batch updates.')
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}
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// TODO support FROM, RETURNING
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public renderUpdate(builder: AbstractBuilder<any>, data: {[key: string]: EscapeValue}): string {
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const rawSql = builder.appliedRawSql
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if ( rawSql ) {
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return rawSql
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}
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const queryLines: string[] = []
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// Add table source
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const source = builder.querySource
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if ( source ) {
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queryLines.push('UPDATE ' + this.renderQuerySource(source))
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}
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queryLines.push(this.renderUpdateSet(data))
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// Add constraints
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const wheres = this.renderConstraints(builder.appliedConstraints)
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if ( wheres.trim() ) {
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queryLines.push('WHERE')
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queryLines.push(wheres)
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}
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const fields = this.renderFields(builder).map(x => ` ${x}`)
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.join(',\n')
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if ( fields ) {
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queryLines.push('RETURNING')
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queryLines.push(fields)
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}
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return queryLines.join('\n')
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}
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public renderExistential(builder: AbstractBuilder<any>): string {
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const rawSql = builder.appliedRawSql
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if ( rawSql ) {
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return `
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SELECT EXISTS(
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${rawSql}
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)
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`
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}
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const query = builder.clone()
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.clearFields()
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.field(raw('TRUE'))
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.limit(1)
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return this.renderSelect(query)
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}
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// FIXME: subquery support here and with select
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public renderInsert(builder: AbstractBuilder<any>, data: {[key: string]: EscapeValue}|{[key: string]: EscapeValue}[] = []): string {
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const rawSql = builder.appliedRawSql
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if ( rawSql ) {
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return rawSql
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}
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const indent = (item: string, level = 1) => Array(level + 1).fill('')
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.join(' ') + item
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const queryLines: string[] = []
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if ( !Array.isArray(data) ) {
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data = [data]
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}
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if ( data.length < 1 ) {
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return ''
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}
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const columns = Object.keys(data[0])
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// Add table source
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const source = builder.querySource
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if ( source ) {
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queryLines.push('INSERT INTO ' + this.renderQuerySource(source)
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+ (columns.length ? ` (${columns.map(x => `"${x}"`).join(', ')})` : ''))
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}
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if ( Array.isArray(data) && !data.length ) {
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queryLines.push('DEFAULT VALUES')
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} else {
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queryLines.push('VALUES')
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const valueString = data.map(row => {
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const values = columns.map(x => this.escape(row[x]))
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return indent(`(${values.join(', ')})`)
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})
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.join(',\n')
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queryLines.push(valueString)
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}
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// Add return fields
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if ( builder.appliedFields?.length ) {
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queryLines.push('RETURNING')
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const fields = this.renderFields(builder).map(x => indent(x))
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.join(',\n')
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queryLines.push(fields)
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}
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return queryLines.join('\n')
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}
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public renderDelete(builder: AbstractBuilder<any>): string {
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const rawSql = builder.appliedRawSql
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if ( rawSql ) {
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return rawSql
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}
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const indent = (item: string, level = 1) => Array(level + 1).fill('')
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.join(' ') + item
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const queryLines: string[] = []
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// Add table source
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const source = builder.querySource
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if ( source ) {
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queryLines.push('DELETE FROM ' + this.renderQuerySource(source))
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}
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// Add constraints
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const wheres = this.renderConstraints(builder.appliedConstraints)
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if ( wheres.trim() ) {
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queryLines.push('WHERE')
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queryLines.push(wheres)
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}
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// Add return fields
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if ( builder.appliedFields?.length ) {
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queryLines.push('RETURNING')
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const fields = this.renderFields(builder).map(x => indent(x))
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.join(',\n')
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queryLines.push(fields)
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}
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return queryLines.join('\n')
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}
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public renderConstraints(allConstraints: Constraint[], startingLevel = 1): string {
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const constraintsToSql = (constraints: Constraint[], level = startingLevel): string => {
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const indent = Array(level * 2).fill(' ')
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.join('')
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const statements = []
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for ( const constraint of constraints ) {
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if ( isConstraintGroup(constraint) ) {
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statements.push(`${indent}${statements.length < 1 ? '' : constraint.preop + ' '}(\n${constraintsToSql(constraint.items, level + 1)}\n${indent})`)
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} else if ( isConstraintItem(constraint) ) {
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if ( Array.isArray(constraint.operand) && !constraint.operand.length ) {
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statements.push(`${indent}1 = 0 -- ${constraint.field} ${constraint.operator} empty set`)
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continue
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}
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const field: string = constraint.field.split('.').map(x => `"${x}"`)
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.join('.')
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statements.push(`${indent}${statements.length < 1 ? '' : constraint.preop + ' '}${field} ${constraint.operator} ${this.escape(constraint.operand).value}`)
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} else if ( constraint instanceof QuerySafeValue ) {
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statements.push(`${indent}${statements.length < 1 ? '' : 'AND '}${constraint.toString()}`)
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}
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}
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return statements.filter(Boolean).join('\n')
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}
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return constraintsToSql(allConstraints)
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}
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public renderUpdateSet(data: {[key: string]: EscapeValue}): string {
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const sets = []
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for ( const key in data ) {
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if ( !Object.prototype.hasOwnProperty.call(data, key) ) {
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continue
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}
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sets.push(` "${key}" = ${this.escape(data[key])}`)
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}
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return `SET\n${sets.join(',\n')}`
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}
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public renderCreateTable(builder: TableBuilder): string {
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const cols = this.renderTableColumns(builder).map(x => ` ${x}`)
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const builderConstraints = builder.getConstraints()
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const constraints: string[] = []
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for ( const constraintName in builderConstraints ) {
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if ( !Object.prototype.hasOwnProperty.call(builderConstraints, constraintName) ) {
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continue
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}
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const constraintBuilder = builderConstraints[constraintName]
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const constraintDefinition = this.renderConstraintDefinition(constraintBuilder)
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if ( constraintDefinition ) {
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constraints.push(` CONSTRAINT ${constraintDefinition}`)
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}
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}
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const parts = [
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`CREATE TABLE ${builder.isSkippedIfExisting() ? 'IF NOT EXISTS ' : ''}${builder.name} (`,
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[
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...cols,
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...constraints,
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].join(',\n'),
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`)`,
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]
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return parts.join('\n')
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}
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public renderTableColumns(builder: TableBuilder): string[] {
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const defined = builder.getColumns()
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const rendered: string[] = []
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for ( const columnName in defined ) {
|
||||
if ( !Object.prototype.hasOwnProperty.call(defined, columnName) ) {
|
||||
continue
|
||||
}
|
||||
|
||||
const columnBuilder = defined[columnName]
|
||||
rendered.push(this.renderColumnDefinition(columnBuilder))
|
||||
}
|
||||
|
||||
return rendered
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a constraint schema-builder, render the constraint definition.
|
||||
* @param builder
|
||||
* @protected
|
||||
*/
|
||||
protected renderConstraintDefinition(builder: ConstraintBuilder): Maybe<string> {
|
||||
const constraintType = builder.getType()
|
||||
if ( constraintType === ConstraintType.Unique ) {
|
||||
const fields = builder.getFields()
|
||||
.map(x => `"${x}"`)
|
||||
.join(',')
|
||||
|
||||
return `${builder.name} UNIQUE(${fields})`
|
||||
} else if ( constraintType === ConstraintType.Check ) {
|
||||
const expression = builder.getExpression()
|
||||
if ( !expression ) {
|
||||
throw new ErrorWithContext('Cannot create check constraint without expression.', {
|
||||
constraintName: builder.name,
|
||||
tableName: builder.parent.name,
|
||||
})
|
||||
}
|
||||
|
||||
return `${builder.name} CHECK(${expression})`
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a column-builder, render the SQL-definition as used in
|
||||
* CREATE TABLE and ALTER TABLE statements.
|
||||
* @fixme Type `serial` only exists on CREATE TABLE... queries
|
||||
* @param builder
|
||||
* @protected
|
||||
*/
|
||||
protected renderColumnDefinition(builder: ColumnBuilder): string {
|
||||
const type = builder.getType()
|
||||
if ( !type ) {
|
||||
throw new ErrorWithContext(`Missing field type for column: ${builder.name}`, {
|
||||
columnName: builder.name,
|
||||
columnType: type,
|
||||
})
|
||||
}
|
||||
|
||||
let render = `${builder.name} ${inverseFieldType(this.mapFieldType(type))}`
|
||||
|
||||
if ( builder.getLength() ) {
|
||||
render += `(${builder.getLength()})`
|
||||
}
|
||||
|
||||
const defaultValue = builder.getDefaultValue()
|
||||
if ( typeof defaultValue !== 'undefined' ) {
|
||||
render += ` DEFAULT ${this.escape(defaultValue)}`
|
||||
}
|
||||
|
||||
if ( builder.isPrimary() ) {
|
||||
render += ` PRIMARY KEY`
|
||||
}
|
||||
|
||||
if ( type === FieldType.serial ) {
|
||||
render += ` AUTOINCREMENT`
|
||||
}
|
||||
|
||||
if ( builder.isUnique() ) {
|
||||
render += ` UNIQUE`
|
||||
}
|
||||
|
||||
render += ` ${builder.isNullable() ? 'NULL' : 'NOT NULL'}`
|
||||
return render
|
||||
}
|
||||
|
||||
private mapFieldType(type: FieldType): FieldType {
|
||||
if ( type === FieldType.serial ) {
|
||||
return FieldType.integer
|
||||
}
|
||||
|
||||
return type
|
||||
}
|
||||
|
||||
public renderDropTable(builder: TableBuilder): string {
|
||||
return `DROP TABLE ${builder.isSkippedIfExisting() ? 'IF EXISTS ' : ''}${builder.name}`
|
||||
}
|
||||
|
||||
public renderCreateIndex(builder: IndexBuilder): string {
|
||||
const cols = builder.getFields().map(x => `"${x}"`)
|
||||
const parts = [
|
||||
`CREATE ${builder.isUnique() ? 'UNIQUE ' : ''}INDEX ${builder.isSkippedIfExisting() ? 'IF NOT EXISTS ' : ''}${builder.name}`,
|
||||
` ON ${builder.parent.name}`,
|
||||
` (${cols.join(',')})`,
|
||||
]
|
||||
|
||||
return parts.join('\n')
|
||||
}
|
||||
|
||||
public renderAlterTable(builder: TableBuilder): string {
|
||||
const alters: string[] = []
|
||||
const columns = builder.getColumns()
|
||||
|
||||
for ( const columnName in columns ) {
|
||||
if ( !Object.prototype.hasOwnProperty.call(columns, columnName) ) {
|
||||
continue
|
||||
}
|
||||
|
||||
const columnBuilder = columns[columnName]
|
||||
if ( !columnBuilder.isExisting() ) {
|
||||
// The column doesn't exist on the table, but was added to the schema
|
||||
alters.push(` ADD COLUMN ${this.renderColumnDefinition(columnBuilder)}`)
|
||||
} else if ( columnBuilder.isDirty() && columnBuilder.originalFromSchema ) {
|
||||
// The column exists in the table, but was modified in the schema
|
||||
if ( columnBuilder.isDropping() || columnBuilder.isDroppingIfExists() ) {
|
||||
alters.push(` DROP COLUMN "${columnBuilder.name}"`)
|
||||
continue
|
||||
}
|
||||
|
||||
// Change the data type of the column
|
||||
if ( columnBuilder.getType() !== columnBuilder.originalFromSchema.getType() ) {
|
||||
const renderedType = `${columnBuilder.getType()}${columnBuilder.getLength() ? `(${columnBuilder.getLength()})` : ''}`
|
||||
alters.push(` ALTER COLUMN "${columnBuilder.name}" TYPE ${renderedType}`)
|
||||
}
|
||||
|
||||
// Change the default value of the column
|
||||
if ( columnBuilder.getDefaultValue() !== columnBuilder.originalFromSchema.getDefaultValue() ) {
|
||||
alters.push(` ALTER COLUMN "${columnBuilder.name}" SET default ${this.escape(columnBuilder.getDefaultValue())}`)
|
||||
}
|
||||
|
||||
// Change the nullable-status of the column
|
||||
if ( columnBuilder.isNullable() !== columnBuilder.originalFromSchema.isNullable() ) {
|
||||
if ( columnBuilder.isNullable() ) {
|
||||
alters.push(` ALTER COLUMN "${columnBuilder.name}" DROP NOT NULL`)
|
||||
} else {
|
||||
alters.push(` ALTER COLUMN "${columnBuilder.name}" SET NOT NULL`)
|
||||
}
|
||||
}
|
||||
|
||||
// Change the name of the column
|
||||
if ( columnBuilder.getRename() ) {
|
||||
alters.push(` RENAME COLUMN "${columnBuilder.name}" TO "${columnBuilder.getRename()}"`)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
const constraints = builder.getConstraints()
|
||||
for ( const constraintName in constraints ) {
|
||||
if ( !Object.prototype.hasOwnProperty.call(constraints, constraintName) ) {
|
||||
continue
|
||||
}
|
||||
|
||||
const constraintBuilder = constraints[constraintName]
|
||||
|
||||
// Drop the constraint if specified
|
||||
if ( constraintBuilder.isDropping() ) {
|
||||
alters.push(` DROP CONSTRAINT ${constraintBuilder.name}`)
|
||||
continue
|
||||
}
|
||||
|
||||
// Drop the constraint with IF EXISTS if specified
|
||||
if ( constraintBuilder.isDroppingIfExists() ) {
|
||||
alters.push(` DROP CONSTRAINT IF EXISTS ${constraintBuilder.name}`)
|
||||
continue
|
||||
}
|
||||
|
||||
// Otherwise, drop and recreate the constraint if it was modified
|
||||
if ( constraintBuilder.isDirty() ) {
|
||||
if ( constraintBuilder.isExisting() ) {
|
||||
alters.push(` DROP CONSTRAINT IF EXISTS ${constraintBuilder.name}`)
|
||||
}
|
||||
|
||||
const constraintDefinition = this.renderConstraintDefinition(constraintBuilder)
|
||||
if ( constraintDefinition ) {
|
||||
alters.push(` ADD CONSTRAINT ${constraintDefinition}`)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if ( builder.getRename() ) {
|
||||
alters.push(` RENAME TO "${builder.getRename()}"`)
|
||||
}
|
||||
|
||||
return 'ALTER TABLE ' + builder.name + '\n' + alters.join(',\n')
|
||||
}
|
||||
|
||||
public renderDropIndex(builder: IndexBuilder): string {
|
||||
return `DROP INDEX ${builder.isDroppingIfExists() ? 'IF EXISTS ' : ''}${builder.name}`
|
||||
}
|
||||
|
||||
public renderTransaction(queries: string[]): string {
|
||||
return queries.join(';\n\n') // fixme: sqlite3 in node doesn't properly support transactions
|
||||
// const parts = [
|
||||
// 'BEGIN',
|
||||
// ...queries,
|
||||
// 'COMMIT;',
|
||||
// ]
|
||||
//
|
||||
// return parts.join(';\n\n')
|
||||
}
|
||||
|
||||
public renderRenameIndex(builder: IndexBuilder): string {
|
||||
return `ALTER INDEX ${builder.name} RENAME TO ${builder.getRename()}`
|
||||
}
|
||||
|
||||
public renderRecreateIndex(builder: IndexBuilder): string {
|
||||
return `${this.renderDropIndex(builder)};\n\n${this.renderCreateIndex(builder)}`
|
||||
}
|
||||
|
||||
public renderDropColumn(builder: ColumnBuilder): string {
|
||||
const parts = [
|
||||
`ALTER TABLE ${builder.parent.name} ${builder.parent.isSkippedIfExisting() ? 'IF EXISTS ' : ''}`,
|
||||
` DROP COLUMN ${builder.isSkippedIfExisting() ? 'IF EXISTS ' : ''}${builder.name}`,
|
||||
]
|
||||
|
||||
return parts.join('\n')
|
||||
}
|
||||
|
||||
public currentTimestamp(): QuerySafeValue {
|
||||
return raw('CURRENT_TIMESTAMP')
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,94 @@
|
||||
import {Schema} from './Schema'
|
||||
import {SQLiteConnection} from '../connection/SQLiteConnection'
|
||||
import {Awaitable} from '../../util'
|
||||
import {TableBuilder} from './TableBuilder'
|
||||
import {Builder} from '../builder/Builder'
|
||||
import {raw} from '../dialect/SQLDialect'
|
||||
|
||||
export class SQLiteSchema extends Schema {
|
||||
constructor(
|
||||
connection: SQLiteConnection,
|
||||
) {
|
||||
super(connection)
|
||||
}
|
||||
|
||||
hasColumn(table: string, name: string): Awaitable<boolean> {
|
||||
return (new Builder()).connection(this.connection)
|
||||
.select(raw('*'))
|
||||
.from(`pragma_table_info(${this.connection.dialect().escape(table)})`) // FIXME: probably needs to be raw(...)
|
||||
.where('name', '=', name)
|
||||
.exists()
|
||||
}
|
||||
|
||||
hasColumns(table: string, name: string[]): Awaitable<boolean> {
|
||||
return (new Builder()).connection(this.connection)
|
||||
.select(raw('*'))
|
||||
.from(`pragma_table_info(${this.connection.dialect().escape(table)})`) // FIXME: probably needs to be raw(...)
|
||||
.whereIn('name', name)
|
||||
.get()
|
||||
.count()
|
||||
.then(num => num === name.length)
|
||||
}
|
||||
|
||||
hasTable(name: string): Awaitable<boolean> {
|
||||
return (new Builder()).connection(this.connection)
|
||||
.select(raw('*'))
|
||||
.from('sqlite_master')
|
||||
.where('type', '=', 'table')
|
||||
.where('name', '=', name)
|
||||
.exists()
|
||||
}
|
||||
|
||||
table(table: string): Awaitable<TableBuilder> {
|
||||
return this.populateTable(new TableBuilder(table))
|
||||
}
|
||||
|
||||
protected async populateTable(table: TableBuilder): Promise<TableBuilder> {
|
||||
if ( !(await this.hasTable(table.name)) ) {
|
||||
return table
|
||||
}
|
||||
|
||||
// Load the existing columns
|
||||
await (new Builder()).connection(this.connection)
|
||||
.select(raw('*'))
|
||||
.from(raw(`pragma_table_info(${this.connection.dialect().escape(table.name)})`))
|
||||
.get()
|
||||
.each(col => {
|
||||
table.column(col.name)
|
||||
.type(col.type)
|
||||
.pipe(line => {
|
||||
return line.unless(col.notnull, builder => builder.nullable())
|
||||
.when(col.dflt_value, builder => builder.default(raw(col.dflt_value)))
|
||||
.when(col.pk, builder => builder.primary())
|
||||
})
|
||||
.flagAsExistingInSchema()
|
||||
})
|
||||
|
||||
// TODO: Load the existing constraints
|
||||
// TODO: Look up and apply the check constraints
|
||||
|
||||
// Look up table indexes
|
||||
await (new Builder()).connection(this.connection)
|
||||
.select(raw('*'))
|
||||
.from(raw(`pragma_index_list(${this.connection.dialect().escape(table.name)})`))
|
||||
.get()
|
||||
.each(async idx => {
|
||||
const indexBuilder = table.index(idx.name)
|
||||
.pipe(line => line.when(idx.unique, builder => builder.unique()))
|
||||
|
||||
const idxColumns = await (new Builder()).connection(this.connection)
|
||||
.select(raw('*'))
|
||||
.from(raw(`pragma_index_xinfo(${this.connection.dialect().escape(idx.name)})`))
|
||||
.whereNotNull('name')
|
||||
.get()
|
||||
.pluck('name')
|
||||
|
||||
idxColumns.whereDefined()
|
||||
.each(col => indexBuilder.field(col))
|
||||
|
||||
indexBuilder.flagAsExistingInSchema()
|
||||
})
|
||||
|
||||
return table.flagAsExistingInSchema()
|
||||
}
|
||||
}
|
||||
Loading…
Reference in new issue