使用findAll查询复杂连接查询

Question

所以我想为这5个表建立关系并做一个findAll并从每个表中获取一些信息。 抱歉丑陋的桌子显示

产品表

| Field  | Type             | Null | Key | Default | Extra          |  
| id     | int(11) unsigned | NO   | PRI | NULL    | auto_increment |  
| typeId | int(11) unsigned | NO   | MUL | NULL    |                |  
| image  | varchar(255)     | YES  |     | NULL    |                |  
| desc   | text             | YES  |     | NULL    |                |  
| price  | float            | YES  |     | NULL    |                |  
| stock  | int(11)          | YES  |     | NULL    |                |  

类型表

| Field | Type         | Null | Key | Default | Extra          |   
| id    | int(11)      | NO   | PRI | NULL    | auto_increment |  
| name  | varchar(255) | NO   |     | NULL    |                |

规格表

| Field     | Type             | Null | Key | Default | Extra |  
| productId | int(11) unsigned | NO   | PRI | NULL    |       |  
| name      | text             | YES  |     | NULL    |       |

JctProductColors表

| Field     | Type             | Null | Key | Default | Extra |   
| productId | int(11) unsigned | NO   | PRI | NULL    |       |  
| colorId   | int(11) unsigned | NO   | PRI | NULL    |       |

颜色表

| Field | Type             | Null | Key | Default | Extra          |   
| id  | int(11) unsigned | NO   | PRI | NULL    | auto_increment |   
| name  | varchar(255)     | NO   |     | NULL    |                |

这就是我现在的关系

  Product.belongsTo(Spec, { "foreignKey": "id", "through": { model: "ProductSpec", unique: false }, "constraints": false }); Spec.belongsTo(Product, { "foreignKey": "productId", "through": { model: "ProductSpec", unique: false }, "constraints": false }); Type.belongsToMany(Product, { "constraints": false, "foreignKey": "id", "through": { model: "ProductType", unique: false } }); Product.belongsTo(Type, { "constraints": false, "foreignKey": "typeId", "through": { model: jctProductColor, unique: false } }); Product.belongsToMany(Color, { "constraints": false, "foreignKey": "productId", "through": { model: jctProductColor, unique: false } }); Color.belongsToMany(Product, { "constraints": false, "foreignKey": "colorId", "through": { model: jctProductColor, unique: false } }); 

我想创建一个findAll来显示它

 select types.name as Type, products.image, products.desc, products.price, products.stock, specs.name as Specs, colors.name as Color from products join types on types.id = products.typeId join specs on products.id = specs.productId join jctproductcolors on jctproductcolors.productId = products.id join colors on colors.id = jctproductcolors.colorid where products.id = :id 

Answer 1

我知道你在一年前问过这个问题，但我正在寻找同样的事情，并找到了你未回答的问题。

你可以这样做：

models.Product.findAll({
  attributes: ['image', 'desc', 'price', 'stock'],
  include: [{
      model: models.Type,
      attributes: [['name', 'Type']]
    }, {
      model: models.Specs,
      attributes: [['name', 'Specs']]
    }, {
      model: models.JctProductColors,
      include: [{
        model: models.Color,
        attributes: [['name', 'Color']]
      }]
    }
  ],
  where: {
    id: id
  }
});

有关更多信息，请访问：
http://docs.sequelizejs.com/en/latest/docs/querying/