Node Js 和 Sequelize 模型从两个表中获取数据

Question

我有一个模型可以 return 人们使用 node 和 sequalize。模型看起来像这样

class DbModel implements IModelMaker {

  static _model: IDatabaseModel = null;

  getModel(db: ISequelize): IDatabaseModel {
    if (DbModel._model)
      return DbModel._model;
    const options = helper.getDatabaseDefaultOptions('people');
    const entity: any = {};
    entity['people_id'] = {type: Sequelize.UUID, primaryKey: true, 'defaultValue': Sequelize.UUIDV4};
    entity['sexes_id'] = helper.getForeignKey('sexes_id', sexes.getModel(db));
    entity['marital_states_id'] = helper.getForeignKey('marital_states_id', marital_states.getModel(db));
    entity['employment_states_id'] = helper.getForeignKey('employment_states_id', employment_states.getModel(db));
    entity['linkedins_id'] = helper.getForeignKey('linkedins_id', linkedins.getModel(db));
    entity['facebooks_id'] = helper.getForeignKey('facebooks_id', facebooks.getModel(db));
    entity['first_names'] = Sequelize.TEXT;
    entity['surnames'] = Sequelize.TEXT;
    entity['name_to_call_user'] = Sequelize.TEXT;
    entity['id_number'] = Sequelize.TEXT;
    entity['passport_number'] = Sequelize.TEXT;
    entity['birth_date'] = Sequelize.DATEONLY;
    entity['tax_number'] = Sequelize.TEXT;
    entity['vat_number'] = Sequelize.TEXT;
    entity['message_to_show_on_user_invoice'] = Sequelize.TEXT;
    entity['workplace_name'] = Sequelize.TEXT;
    entity['is_verified'] = Sequelize.BOOLEAN;
    entity['has_private_profile_enabled'] = Sequelize.BOOLEAN;
    entity['mobile_phone'] = Sequelize.TEXT;
    entity['occupations_id'] = Sequelize.UUID;
    entity['profile_photo_url'] = Sequelize.TEXT;
    entity['private_profile_url'] = Sequelize.TEXT;
    entity['public_profile_url'] = Sequelize.TEXT;
    entity['description'] = Sequelize.TEXT;
    entity['created_at'] = Sequelize.DATE;
    const result = db.define('dbo.people', entity, options);
    result.belongsTo(sexes.getModel(db), {foreignKey: 'sexes_id'});
    result.belongsTo(marital_states.getModel(db), {foreignKey: 'marital_states_id'});
    result.belongsTo(employment_states.getModel(db), {foreignKey: 'employment_states_id'});
    result.belongsTo(linkedins.getModel(db), {foreignKey: 'linkedins_id'});
    result.belongsTo(facebooks.getModel(db), {foreignKey: 'facebooks_id'});
    DbModel._model = result;
    return result;
  }

这让我得到了存储在 dbo.people table 中的结果，这很棒，因为这就是我想要的，而且这个模型非常适合它。现在我要做的是添加到这个模型并从另一个 table 调用数据。所以我想从 dbo.users_references 获取数据以使用此模型调用。

我的问题是，有没有办法向像上面那样创建的模型添加连接语句，或者我是否需要创建一个新模型并将其作为单独的函数调用。第二种方法适用于我的情况，但我想保持简单，所以如果我能在一个模型中得到所有的东西，那么我会很高兴，否则我必须对另一个选项感到有点满意

Answer 1

您需要 define 一个 users_references 的模型，并以与 sexes、marital_states 等相同的方式关联它。加入当指定 include.

的内容时，实际上会在查询时发生

用法示例：

DbModel.findAll({
  where: ...,
  include: [
    { model: employment_states.getModel(db) },
    { model: users_references.getModel(db) }
  ]
});

如果这看起来有点曲折，我深表歉意 - 确实如此，因为我收集到你的项目中有很多 post 中没有的辅助逻辑。您可能想查看 the docs，但不可否认，他们对如何从查询中的相关表中实际获取数据有点模糊，但它们应该足以涵盖您所描述的内容。

Node Js 和 Sequelize 模型从两个表中获取数据

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