{
  "version": 3,
  "sources": ["../../src/associations/has-one.js"],
  "sourcesContent": ["'use strict';\n\nconst Utils = require('./../utils');\nconst Helpers = require('./helpers');\nconst _ = require('lodash');\nconst Association = require('./base');\nconst Op = require('../operators');\n\n/**\n * One-to-one association\n *\n * In the API reference below, add the name of the association to the method, e.g. for `User.hasOne(Project)` the getter will be `user.getProject()`.\n * This is almost the same as `belongsTo` with one exception - The foreign key will be defined on the target model.\n *\n * @see {@link Model.hasOne}\n */\nclass HasOne extends Association {\n  constructor(source, target, options) {\n    super(source, target, options);\n\n    this.associationType = 'HasOne';\n    this.isSingleAssociation = true;\n    this.foreignKeyAttribute = {};\n\n    if (this.as) {\n      this.isAliased = true;\n      this.options.name = {\n        singular: this.as\n      };\n    } else {\n      this.as = this.target.options.name.singular;\n      this.options.name = this.target.options.name;\n    }\n\n    if (_.isObject(this.options.foreignKey)) {\n      this.foreignKeyAttribute = this.options.foreignKey;\n      this.foreignKey = this.foreignKeyAttribute.name || this.foreignKeyAttribute.fieldName;\n    } else if (this.options.foreignKey) {\n      this.foreignKey = this.options.foreignKey;\n    }\n\n    if (!this.foreignKey) {\n      this.foreignKey = Utils.camelize(\n        [\n          Utils.singularize(this.options.as || this.source.name),\n          this.source.primaryKeyAttribute\n        ].join('_')\n      );\n    }\n\n    if (\n      this.options.sourceKey\n      && !this.source.rawAttributes[this.options.sourceKey]\n    ) {\n      throw new Error(`Unknown attribute \"${this.options.sourceKey}\" passed as sourceKey, define this attribute on model \"${this.source.name}\" first`);\n    }\n\n    this.sourceKey = this.sourceKeyAttribute = this.options.sourceKey || this.source.primaryKeyAttribute;\n    this.sourceKeyField = this.source.rawAttributes[this.sourceKey].field || this.sourceKey;\n    this.sourceKeyIsPrimary = this.sourceKey === this.source.primaryKeyAttribute;\n\n    this.associationAccessor = this.as;\n    this.options.useHooks = options.useHooks;\n\n    if (this.target.rawAttributes[this.foreignKey]) {\n      this.identifierField = this.target.rawAttributes[this.foreignKey].field || this.foreignKey;\n    }\n\n    // Get singular name, trying to uppercase the first letter, unless the model forbids it\n    const singular = _.upperFirst(this.options.name.singular);\n\n    this.accessors = {\n      get: `get${singular}`,\n      set: `set${singular}`,\n      create: `create${singular}`\n    };\n  }\n\n  // the id is in the target table\n  _injectAttributes() {\n    const newAttributes = {\n      [this.foreignKey]: {\n        type: this.options.keyType || this.source.rawAttributes[this.sourceKey].type,\n        allowNull: true,\n        ...this.foreignKeyAttribute\n      }\n    };\n\n    if (this.options.constraints !== false) {\n      const target = this.target.rawAttributes[this.foreignKey] || newAttributes[this.foreignKey];\n      this.options.onDelete = this.options.onDelete || (target.allowNull ? 'SET NULL' : 'CASCADE');\n      this.options.onUpdate = this.options.onUpdate || 'CASCADE';\n    }\n\n    Helpers.addForeignKeyConstraints(newAttributes[this.foreignKey], this.source, this.target, this.options, this.sourceKeyField);\n    Utils.mergeDefaults(this.target.rawAttributes, newAttributes);\n\n    this.target.refreshAttributes();\n\n    this.identifierField = this.target.rawAttributes[this.foreignKey].field || this.foreignKey;\n\n    Helpers.checkNamingCollision(this);\n\n    return this;\n  }\n\n  mixin(obj) {\n    const methods = ['get', 'set', 'create'];\n\n    Helpers.mixinMethods(this, obj, methods);\n  }\n\n  /**\n   * Get the associated instance.\n   *\n   * @param {Model|Array<Model>} instances source instances\n   * @param {object}         [options] find options\n   * @param {string|boolean} [options.scope] Apply a scope on the related model, or remove its default scope by passing false\n   * @param {string} [options.schema] Apply a schema on the related model\n   *\n   * @see\n   * {@link Model.findOne} for a full explanation of options\n   *\n   * @returns {Promise<Model>}\n   */\n  async get(instances, options) {\n    const where = {};\n\n    let Target = this.target;\n    let instance;\n\n    options = Utils.cloneDeep(options);\n\n    if (Object.prototype.hasOwnProperty.call(options, 'scope')) {\n      if (!options.scope) {\n        Target = Target.unscoped();\n      } else {\n        Target = Target.scope(options.scope);\n      }\n    }\n\n    if (Object.prototype.hasOwnProperty.call(options, 'schema')) {\n      Target = Target.schema(options.schema, options.schemaDelimiter);\n    }\n\n    if (!Array.isArray(instances)) {\n      instance = instances;\n      instances = undefined;\n    }\n\n    if (instances) {\n      where[this.foreignKey] = {\n        [Op.in]: instances.map(_instance => _instance.get(this.sourceKey))\n      };\n    } else {\n      where[this.foreignKey] = instance.get(this.sourceKey);\n    }\n\n    if (this.scope) {\n      Object.assign(where, this.scope);\n    }\n\n    options.where = options.where ?\n      { [Op.and]: [where, options.where] } :\n      where;\n\n    if (instances) {\n      const results = await Target.findAll(options);\n      const result = {};\n      for (const _instance of instances) {\n        result[_instance.get(this.sourceKey, { raw: true })] = null;\n      }\n\n      for (const _instance of results) {\n        result[_instance.get(this.foreignKey, { raw: true })] = _instance;\n      }\n\n      return result;\n    }\n\n    return Target.findOne(options);\n  }\n\n  /**\n   * Set the associated model.\n   *\n   * @param {Model} sourceInstance the source instance\n   * @param {?Model|string|number} [associatedInstance] An persisted instance or the primary key of an instance to associate with this. Pass `null` or `undefined` to remove the association.\n   * @param {object} [options] Options passed to getAssociation and `target.save`\n   *\n   * @returns {Promise}\n   */\n  async set(sourceInstance, associatedInstance, options) {\n    options = { ...options, scope: false };\n\n    const oldInstance = await sourceInstance[this.accessors.get](options);\n    // TODO Use equals method once #5605 is resolved\n    const alreadyAssociated = oldInstance && associatedInstance && this.target.primaryKeyAttributes.every(attribute =>\n      oldInstance.get(attribute, { raw: true }) === (associatedInstance.get ? associatedInstance.get(attribute, { raw: true }) : associatedInstance)\n    );\n\n    if (oldInstance && !alreadyAssociated) {\n      oldInstance[this.foreignKey] = null;\n\n      await oldInstance.save({\n        ...options,\n        fields: [this.foreignKey],\n        allowNull: [this.foreignKey],\n        association: true\n      });\n    }\n    if (associatedInstance && !alreadyAssociated) {\n      if (!(associatedInstance instanceof this.target)) {\n        const tmpInstance = {};\n        tmpInstance[this.target.primaryKeyAttribute] = associatedInstance;\n        associatedInstance = this.target.build(tmpInstance, {\n          isNewRecord: false\n        });\n      }\n\n      Object.assign(associatedInstance, this.scope);\n      associatedInstance.set(this.foreignKey, sourceInstance.get(this.sourceKeyAttribute));\n\n      return associatedInstance.save(options);\n    }\n\n    return null;\n  }\n\n  /**\n   * Create a new instance of the associated model and associate it with this.\n   *\n   * @param {Model} sourceInstance the source instance\n   * @param {object} [values={}] values to create associated model instance with\n   * @param {object} [options] Options passed to `target.create` and setAssociation.\n   *\n   * @see\n   * {@link Model#create} for a full explanation of options\n   *\n   * @returns {Promise<Model>} The created target model\n   */\n  async create(sourceInstance, values, options) {\n    values = values || {};\n    options = options || {};\n\n    if (this.scope) {\n      for (const attribute of Object.keys(this.scope)) {\n        values[attribute] = this.scope[attribute];\n        if (options.fields) {\n          options.fields.push(attribute);\n        }\n      }\n    }\n\n    values[this.foreignKey] = sourceInstance.get(this.sourceKeyAttribute);\n    if (options.fields) {\n      options.fields.push(this.foreignKey);\n    }\n\n    return await this.target.create(values, options);\n  }\n\n  verifyAssociationAlias(alias) {\n    if (typeof alias === 'string') {\n      return this.as === alias;\n    }\n\n    if (alias && alias.singular) {\n      return this.as === alias.singular;\n    }\n\n    return !this.isAliased;\n  }\n}\n\nmodule.exports = HasOne;\n"],
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