Models unit; session model; generalize session classes/interfaces

orm/src/ModelsUnit.ts

@@ -0,0 +1,20 @@
+import {CanonicalDefinition} from '../../lib/src/unit/Canonical.ts'
+import {Model} from './model/Model.ts'
+import {Unit} from '../../lib/src/lifecycle/decorators.ts'
+import {StaticCanonical} from '../../lib/src/unit/StaticCanonical.ts'
+
+@Unit()
+export default class ModelsUnit extends StaticCanonical<Model<any>, typeof Model> {
+    protected base_path = './app/models'
+    protected canonical_item = 'model'
+    protected suffix = '.model.ts'
+
+    public async init_canonical_item(def: CanonicalDefinition) {
+        const item = await super.init_canonical_item(def)
+        if ( !(item.prototype instanceof Model) ) {
+            throw new TypeError(`Invalid model definition: ${def.original_name}. Models must extend from Daton ORM's base Model class.`)
+        }
+
+        return item
+    }
+}

orm/src/builder/type/ConnectionExecutable.ts

@@ -82,6 +82,10 @@ export default abstract class ConnectionExecutable<T> {
         return 0
     }
 
+    async exists(): Promise<boolean> {
+        return (await this.count()) > 0
+    }
+
     async execute_in_connection(connection: string | Connection): Promise<QueryResult> {
         const conn = typeof connection === 'string' ? make(Database).connection(connection) : connection
 

orm/src/db/PostgresConnection.ts

@@ -19,7 +19,7 @@ export default class PostgresConnection extends Connection {
         const result = await this._client.query(query)
 
         let base_i = 0
-        const cols = collect(result?.rowDescription?.columns || []).sortBy('index').map(col => {
+        const cols = collect(result?.rowDescription?.columns || []).map(col => {
             col.index = base_i
             base_i += 1
             return col

orm/src/model/Model.ts

@@ -24,7 +24,7 @@ export abstract class Model<T extends Model<T>> extends Builder<T> {
      * The name of the connection this model should run through.
      * @type string
      */
-    protected static connection: string
+    protected static connection: string = 'default'
 
     /**
      * The name of the table this model is stored in.
@@ -42,13 +42,13 @@ export abstract class Model<T extends Model<T>> extends Builder<T> {
      * Optionally, the timestamp field set on creation.
      * @type string
      */
-    protected static readonly CREATED_AT = 'created_at'
+    protected static readonly CREATED_AT: string | null = 'created_at'
 
     /**
      * Optionally, the timestamp field set op update.
      * @type string
      */
-    protected static readonly UPDATED_AT = 'updated_at'
+    protected static readonly UPDATED_AT: string | null = 'updated_at'
 
     /**
      * If true, the CREATED_AT and UPDATED_AT columns will be automatically set.
@@ -569,7 +569,7 @@ export abstract class Model<T extends Model<T>> extends Builder<T> {
      * @param without_timestamps - if true, the UPDATED_AT/CREATED_AT timestamps will not be touched
      * @return Promise<Model>
      */
-    public async save({ without_timestamps = false }): Promise<Model<T>> {
+    public async save({ without_timestamps = false } = {}): Promise<Model<T>> {
         await this.saving$.next(this)
         const constructor = (this.constructor as typeof Model)