双多对多关系

Question

在环回中，我定义了两个具有一对多关系的模型，如下所示：

action.json：

    {
      "name": "Action",
      "base": "PersistedModel",
      "idInjection": true,
      "options": {
        "validateUpsert": true
      },
      "properties": {
        "text": {
          "type": "string",
          "required": true
        }
      },
      "validations": [],
      "relations": {
        "benchmark": {
          "type": "hasAndBelongsToMany",
          "model": "Course",
          "foreignKey": "benchmark"
        },
        "main": {
          "type": "hasAndBelongsToMany",
          "model": "Course",
          "foreignKey": "main"
        }
      },
      "acls": [],
      "methods": {}
    }

course.json：

    {
      "name": "Course",
      "base": "TrashModel",
      "idInjection": true,
      "options": {
        "validateUpsert": true
      },
      "properties": {
        "name": {
          "type": "string",
          "required": true
        }
      },
      "validations": [],
      "relations": {
        "benchmark": {
          "type": "hasAndBelongsToMany",
          "model": "Action",
          "foreignKey": "benchmark"
        },
        "main": {
          "type": "hasAndBelongsToMany",
          "model": "Action",
          "foreignKey": "main"
        }
      },
      "acls": [],
      "methods": {}
    }

现在，当我尝试使用以下PUT请求在动作模型和课程模型之间创建关系时：

http：// localhost：3000 / api / courses / 57331a4eeff440cb02c886ae / benchmark / rel / 5731d60da2c6d238e3c3d9b3

然后，当我请求课程模型以及以下GET请求中包含的相关动作模型时：

http：// localhost：3000 / api / courses / 57331a4eeff440cb02c886ae？filter =％7B％22include％22％3A％5B％22benchmark％22％2C％22main％22％5D％7D

我得到：

    {
      "name": "Introduction Lessons",
      "id": "57331a4eeff440cb02c886ae",
      "benchmark": [{
        "text": "text here",
        "id": "5731d60da2c6d238e3c3d9b3"
      }],
      "main": [{
        "text": "text here",
        "id": "5731d60da2c6d238e3c3d9b3"
      }]
    }

因此，显然现在通过基准作为主要关系附加了动作。 这怎么发生的？ 我的模型设置是否错误？

Answer 1

据我了解，当您使用hasAndBelongsToMany冲突时，环回会使用一个穿透表，该表会自动为您管理。

我相信默认情况下它自称为From_modelTo_model。 为了产生两个这样的冲突，您需要告诉回送以不同的方式进行管理，否则它们将使用相同的穿透表。

尝试通过选项，例如

行动

"benchmark": {
  "type": "hasAndBelongsToMany",
  "model": "Course",
  "foreignKey": "benchmark",
  "through":"ActionCourseBenchmark"
},
"main": {
  "type": "hasAndBelongsToMany",
  "model": "Course",
  "foreignKey": "main",
  "through":"ActionCourseMain"
}

课程

"benchmark": {
  "type": "hasAndBelongsToMany",
  "model": "Action",
  "foreignKey": "benchmark",
  "through":"ActionCourseBenchmark"
},
"main": {
  "type": "hasAndBelongsToMany",
  "model": "Action",
  "foreignKey": "main",
  "through":"ActionCourseMain"
}

请参阅此github问题以获取更多详细信息