@sqb/connect/orm/model/link-chain.js

Multi-dialect database connection framework written with TypeScript

import { AssociationNode } from './association-node.js';
export class LinkChain {
    target;
    first;
    current;
    constructor(target, targetKey, sourceKey, many) {
        this.target = target;
        this.first = this.current = new AssociationNode('', {
            many,
            target,
            source: null,
            sourceKey,
            targetKey: targetKey,
        });
    }
    where(conditions) {
        this.current.conditions = this.current.conditions || [];
        if (Array.isArray(conditions))
            this.current.conditions.push(...conditions);
        else
            this.current.conditions.push(conditions);
        return this;
    }
    linkToOne(target, targetColumn, parentColumn) {
        return this._newNode(target, targetColumn, parentColumn);
    }
    linkToMany(target, targetColumn, parentColumn) {
        return this._newNode(target, targetColumn, parentColumn, true);
    }
    _newNode(target, targetKey, parentKey, many = false) {
        const child = new AssociationNode(this.current.name, {
            many,
            source: this.current.target,
            target,
            sourceKey: parentKey,
            targetKey: targetKey,
        });
        child.prior = this.current;
        this.current.next = child;
        this.current = child;
        return this;
    }
}