续集帮助协会

Question

所有，下面附上一个 SQL 查询，我在 sequelize 中用作原始查询，它运行良好。现在我正在尝试在 sequelize 中使用 mixin 关联来设置它，但无法这样做。确实浏览了帮助文档，但无法完全掌握细节。也许它只是我。无论如何，下面附上我正在尝试修改的查询。如果有人可以提出一些指示或有一些样本来帮助我重做这个，我将不胜感激？提前致谢。

select cust.*, cust_role.id, cust_role.rolename, role.roletype
from
customer cust, customer_roles cust_role, roles role
where
cust.id = cust_role.user and
cust_role.role = role.id and
cust.id like '0123456' //customerId

表关系

customer_roles has a foreign key to both roles and customer tables
customer to customer_roles (1 to many), 
customer_roles to roles (many to 1)

我正在导入模型

var custModel = sequelize.import('../models/customer.js');
var custRolesModel = sequelize.import('../models/customer_roles.js');
var roleModel = sequelize.import('../models/roles.js');

试图建立关系

custModel.hasMany(custRolesModel);
custRolesModel.belongsTo(custModel);

roleModel.hasMany(custRolesModel);
custRolesModel.belongsTo(roleModel);

最后试图吸引客户..

custModel.findAll({
  include:[{
    model:custRolesModel,
    include:[{
      model:roleModel,
      where: {
        username:req.body.username
      },
      required:false
    }]
  }]
}).then(function (result) {
......

Answer 1

根据上面的建议和 SO 中的另一个建议，我能够解决它。这就是我所做的，以防有人需要知道。

https://stackoverflow.com/a/36006808/1657861

修改后的关系

custModel.belongsToMany(custRolesModel, {
  through:'customer_roles', //Used table name
  foreignKey: 'user',
  otherKey:'id'
});

custRolesModel.belongsToMany(roleModel, {
  through: 'customer_roles', //Used table name
  foreignKey: 'role',
  otherKey: 'id'
});

usersModel.findAll({
  where : {
    username:req.body.username
  },
  include:[{
    model:userRolesMembershipModel,
    include:[{
      model:roleModel
    }]
  }]
})

Answer 2

这可能有效：

custModel.findAll({
  where : {
    id:req.body.userId
  },
  include:[{
    model:custRolesModel,
    include:[{
      model:roleModel
    }]
  }]
}).then(function (result) {
......

注意 where 子句属于客户模型而不是角色模型。