@warp-works/warpjs-utils/lib/doc-level/models/relationship.js

Utility functions for WarpJS and plugins

// const debug = require('debug')('W2:warpjs-utils:lib/doc-level/models/relationship');
const Promise = require('bluebird');

const constants = require('./../constants');
const firstLevel = require('./../first-level');
const WarpJSError = require('./../../error');

module.exports = {
    getData(persistence, relationship, instance, docLevel) {
        // debug(`getData(): relationship=${relationship.name}`);
        // debug(`getData(): instance=`, instance);
        // debug(`getData(): docLevel=`, docLevel);
        const { type, value } = firstLevel(docLevel);

        switch (type) {
            case constants.TYPES.ENTITY: {
                // Avoid cyclic
                const docLevelEntity = require('./entity');
                const targetEntity = relationship.getTargetEntity();

                switch (targetEntity.entityType) {
                    case 'Embedded': {
                        return Promise.resolve()
                            .then(() => relationship.getTargetReferences(instance))
                            .then((relationships) => relationships.find((reference) => reference._id === value))
                            .then((reference) => docLevelEntity.getData(persistence, targetEntity, reference, docLevel.slice(1)))
                        ;
                    }

                    default: {
                        throw new WarpJSError(`Unknown entityType=${targetEntity.entityType}`);
                    }
                }
            }

            default: {
                throw new WarpJSError(`TODO: implement relationship for ${constants.dataKey}=${type}.`);
            }
        }
    }
};