Function singleLinked

lib/associations/mixin.js:88–117

(Type)

// The logic for hasOne and belongsTo is exactly the same
function singleLinked(Type) {
  return function(target, options = {}) {
    // eslint-disable-next-line no-invalid-this
    const source = this;
    if (!isModel(target, source.sequelize)) {
      throw new Error(`${source.name}.${_.lowerFirst(Type.name)} called with something that's not a subclass of Sequelize.Model`);
    }


    // Since this is a mixin, we'll need a unique letiable name for hooks (since Model will override our hooks option)
    options.hooks = options.hooks === undefined ? false : Boolean(options.hooks);
    options.useHooks = options.hooks;

    if (options.useHooks) {
      source.runHooks('beforeAssociate', { source, target, type: Type }, options);
    }
    // the id is in the foreign table
    const association = new Type(source, target, Object.assign(options, source.options));
    source.associations[association.associationAccessor] = association;

    association._injectAttributes();
    association.mixin(source.prototype);

    if (options.useHooks) {
      source.runHooks('afterAssociate', { source, target, type: Type, association }, options);
    }

    return association;
  };
}

Mixin.hasOne = singleLinked(HasOne);
Mixin.belongsTo = singleLinked(BelongsTo);