StrongLoop REST API“hasManyThrough”包含过滤器总是返回空

Question

前提

非常简短。在我的 StrongLoop 测试/学习环境中，我设置了两个模型：CoffeeShop 和 Person。个人可以有很多“雇主”，CoffeeShops 可以有很多“员工”。这种关系由 CofeeShop 和 Person 模型上的“hasMany”/“through”类型关系维护。

问题

通过 REST API 查询任一模型时，包含过滤器始终为关联关系返回一个空数组，即使关系存在。换句话说，API 调用

http://localhost:3000/api/CoffeeShops/67/employees

按预期工作，但是

GET: http://localhost:3000/api/CoffeeShops/67/?filter={"include":["employees"]}

没有。

谁能帮我弄清楚这是为什么？我还附上了图片和 .json 模型定义文件。

// /common/models/coffee-shop.json

{
  "name": "CoffeeShop",
  "base": "PersistedModel",
  "idInjection": true,
  "options": {
    "validateUpsert": true
  },
  "properties": {
    "name": {
      "type": "string",
      "required": true
    },
    "city": {
      "type": "string",
      "required": true
    },
    "numberEmployees": {
      "type": "number"
    },
    "ownerId": {
      "type": "number"
    },
    "isSmallBusiness": {
      "type": "boolean"
    }
  },
  "validations": [],
  "relations": {
    "owner": {
      "type": "belongsTo",
      "model": "Person",
      "foreignKey": ""
    },
    "employees": {
      "type": "hasMany",
      "model": "Person",
      "foreignKey": "employerId",
      "through": "CoffeeShopPersonEmployeeEmployer"
    }
  },
  "acls": [],
  "methods": {}
}

// /omon/models/person.json
{
  "name": "Person",
  "plural": "Persons",
  "base": "PersistedModel",
  "idInjection": true,
  "options": {
    "validateUpsert": true
  },
  "properties": {
    "name": {
      "type": "string",
      "required": true
    },
    "age": {
      "type": "number"
    }
  },
  "validations": [],
  "relations": {
    "shops": {
      "type": "hasMany",
      "model": "CoffeeShop",
      "foreignKey": "ownerId"
    },
    "employers": {
      "type": "hasMany",
      "model": "CoffeeShop",
      "foreignKey": "employeeId",
      "through": "CoffeeShopPersonEmployeeEmployer"
    }
  },
  "acls": [],
  "methods": {}
}

// /common/models/coffee-shop-person-employee-employer.json
{
  "name": "CoffeeShopPersonEmployeeEmployer",
  "base": "PersistedModel",
  "idInjection": true,
  "options": {
    "validateUpsert": true
  },
  "properties": {},
  "validations": [],
  "relations": {
    "person": {
      "type": "belongsTo",
      "model": "Person",
      "foreignKey": "employeeId"
    },
    "coffeeShop": {
      "type": "belongsTo",
      "model": "CoffeeShop",
      "foreignKey": "employerId"
    }
  },
  "acls": [],
  "methods": {}
}

Images of REST requests

Answer 1

在您的 CoffeeShopPersonEmployeeEmployer 模型中：

添加外键属性：

"properties": {
    "CoffeeShopId": {
      "type": "number",
      "required": true
    },
    "PersonId": {
      "type": "number",
      "required": true
    }
}

并调整关系：

"relations": {
    "person": {
      "type": "belongsTo",
      "model": "Person",
      "foreignKey": "PersonId"
    },
    "coffeeShop": {
      "type": "belongsTo",
      "model": "CoffeeShop",
      "foreignKey": "CoffeeShopId"
    }
}