sequelize/lib/associations/belongs-to.js

Sequelize is a promise-based Node.js ORM tool for Postgres, MySQL, MariaDB, SQLite, Microsoft SQL Server, Amazon Redshift and Snowflake’s Data Cloud. It features solid transaction support, relations, eager and lazy loading, read replication and more.

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropSymbols = Object.getOwnPropertySymbols;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __propIsEnum = Object.prototype.propertyIsEnumerable;
var __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, { enumerable: true, configurable: true, writable: true, value }) : obj[key] = value;
var __spreadValues = (a, b) => {
  for (var prop in b || (b = {}))
    if (__hasOwnProp.call(b, prop))
      __defNormalProp(a, prop, b[prop]);
  if (__getOwnPropSymbols)
    for (var prop of __getOwnPropSymbols(b)) {
      if (__propIsEnum.call(b, prop))
        __defNormalProp(a, prop, b[prop]);
    }
  return a;
};
const Utils = require("./../utils");
const Helpers = require("./helpers");
const _ = require("lodash");
const Association = require("./base");
const { Op } = require("../operators");
class BelongsTo extends Association {
  constructor(source, target, options) {
    super(source, target, options);
    this.associationType = "BelongsTo";
    this.isSingleAssociation = true;
    this.foreignKeyAttribute = {};
    if (this.as) {
      this.isAliased = true;
      this.options.name = {
        singular: this.as
      };
    } else {
      this.as = this.target.options.name.singular;
      this.options.name = this.target.options.name;
    }
    if (_.isObject(this.options.foreignKey)) {
      this.foreignKeyAttribute = this.options.foreignKey;
      this.foreignKey = this.foreignKeyAttribute.name || this.foreignKeyAttribute.fieldName;
    } else if (this.options.foreignKey) {
      this.foreignKey = this.options.foreignKey;
    }
    if (!this.foreignKey) {
      this.foreignKey = Utils.camelize([
        this.as,
        this.target.primaryKeyAttribute
      ].join("_"));
    }
    this.identifier = this.foreignKey;
    if (this.source.rawAttributes[this.identifier]) {
      this.identifierField = this.source.rawAttributes[this.identifier].field || this.identifier;
    }
    if (this.options.targetKey && !this.target.rawAttributes[this.options.targetKey]) {
      throw new Error(`Unknown attribute "${this.options.targetKey}" passed as targetKey, define this attribute on model "${this.target.name}" first`);
    }
    this.targetKey = this.options.targetKey || this.target.primaryKeyAttribute;
    this.targetKeyField = this.target.rawAttributes[this.targetKey].field || this.targetKey;
    this.targetKeyIsPrimary = this.targetKey === this.target.primaryKeyAttribute;
    this.targetIdentifier = this.targetKey;
    this.associationAccessor = this.as;
    this.options.useHooks = options.useHooks;
    const singular = _.upperFirst(this.options.name.singular);
    this.accessors = {
      get: `get${singular}`,
      set: `set${singular}`,
      create: `create${singular}`
    };
  }
  _injectAttributes() {
    const newAttributes = {
      [this.foreignKey]: __spreadValues({
        type: this.options.keyType || this.target.rawAttributes[this.targetKey].type,
        allowNull: true
      }, this.foreignKeyAttribute)
    };
    if (this.options.constraints !== false) {
      const source = this.source.rawAttributes[this.foreignKey] || newAttributes[this.foreignKey];
      this.options.onDelete = this.options.onDelete || (source.allowNull ? "SET NULL" : "NO ACTION");
      this.options.onUpdate = this.options.onUpdate || "CASCADE";
    }
    Helpers.addForeignKeyConstraints(newAttributes[this.foreignKey], this.target, this.source, this.options, this.targetKeyField);
    Utils.mergeDefaults(this.source.rawAttributes, newAttributes);
    this.source.refreshAttributes();
    this.identifierField = this.source.rawAttributes[this.foreignKey].field || this.foreignKey;
    Helpers.checkNamingCollision(this);
    return this;
  }
  mixin(obj) {
    const methods = ["get", "set", "create"];
    Helpers.mixinMethods(this, obj, methods);
  }
  async get(instances, options) {
    const where = {};
    let Target = this.target;
    let instance;
    options = Utils.cloneDeep(options);
    if (Object.prototype.hasOwnProperty.call(options, "scope")) {
      if (!options.scope) {
        Target = Target.unscoped();
      } else {
        Target = Target.scope(options.scope);
      }
    }
    if (Object.prototype.hasOwnProperty.call(options, "schema")) {
      Target = Target.schema(options.schema, options.schemaDelimiter);
    }
    if (!Array.isArray(instances)) {
      instance = instances;
      instances = void 0;
    }
    if (instances) {
      where[this.targetKey] = {
        [Op.in]: instances.map((_instance) => _instance.get(this.foreignKey))
      };
    } else {
      if (this.targetKeyIsPrimary && !options.where) {
        return Target.findByPk(instance.get(this.foreignKey), options);
      }
      where[this.targetKey] = instance.get(this.foreignKey);
      options.limit = null;
    }
    options.where = options.where ? { [Op.and]: [where, options.where] } : where;
    if (instances) {
      const results = await Target.findAll(options);
      const result = {};
      for (const _instance of instances) {
        result[_instance.get(this.foreignKey, { raw: true })] = null;
      }
      for (const _instance of results) {
        result[_instance.get(this.targetKey, { raw: true })] = _instance;
      }
      return result;
    }
    return Target.findOne(options);
  }
  async set(sourceInstance, associatedInstance, options = {}) {
    let value = associatedInstance;
    if (associatedInstance instanceof this.target) {
      value = associatedInstance[this.targetKey];
    }
    sourceInstance.set(this.foreignKey, value);
    if (options.save === false) {
      return;
    }
    options = __spreadValues({
      fields: [this.foreignKey],
      allowNull: [this.foreignKey],
      association: true
    }, options);
    return await sourceInstance.save(options);
  }
  async create(sourceInstance, values, options) {
    values = values || {};
    options = options || {};
    const newAssociatedObject = await this.target.create(values, options);
    await sourceInstance[this.accessors.set](newAssociatedObject, options);
    return newAssociatedObject;
  }
  verifyAssociationAlias(alias) {
    if (typeof alias === "string") {
      return this.as === alias;
    }
    if (alias && alias.singular) {
      return this.as === alias.singular;
    }
    return !this.isAliased;
  }
}
module.exports = BelongsTo;
module.exports.BelongsTo = BelongsTo;
module.exports.default = BelongsTo;
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