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48 lines
1.3 KiB
48 lines
1.3 KiB
2 years ago
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import {Model} from '../Model'
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import {HasOneOrMany} from './HasOneOrMany'
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import {Collection} from '../../../util'
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import {RelationNotLoadedError} from './Relation'
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/**
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* One-to-many relation implementation.
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*/
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export class HasMany<T extends Model<T>, T2 extends Model<T2>> extends HasOneOrMany<T, T2, Collection<T2>> {
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protected cachedValue?: Collection<T2>
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protected cachedLoaded = false
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constructor(
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parent: T,
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related: T2,
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foreignKeyOverride?: keyof T & string,
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localKeyOverride?: keyof T2 & string,
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) {
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super(parent, related, foreignKeyOverride, localKeyOverride)
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}
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/** Resolve the result of this relation. */
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public get(): Promise<Collection<T2>> {
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return this.fetch().collect()
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}
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/** Set the value of this relation. */
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public setValue(related: Collection<T2>): void {
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this.cachedValue = related.clone()
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this.cachedLoaded = true
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}
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/** Get the value of this relation. */
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public getValue(): Collection<T2> {
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if ( !this.cachedValue ) {
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throw new RelationNotLoadedError()
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}
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return this.cachedValue
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}
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/** Returns true if the relation has been loaded. */
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public isLoaded(): boolean {
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return this.cachedLoaded
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}
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}
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