Express 将已存在的模型传递到环回中的下一个模型

有

项目

模型

{
  "name": "Project",
  "plural": "Projects",
  "base": "PersistedModel",
  "idInjection": true,
  "options": {
    "validateUpsert": true
  },
  "properties": {
    "title": {
      "type": "string",
      "required": true
    },
    "description": {
      "type": "string"
    },
    "code": {
      "type": "string"
    },
    "startDate": {
      "type": "date",
      "required": true
    },
    "endDate": {
      "type": "date"
    },
    "value": {
      "type": "number"
    },
    "infoEN": {
      "type": "string"
    },
    "infoRU": {
      "type": "string"
    },
    "infoAM": {
      "type": "string"
    },
    "externalLinks": {
      "type": [
        "string"
      ]
    }
  },
  "validations": [],
  "relations": {
    "industry": {
      "type": "belongsTo",
      "model": "Industry",
      "foreignKey": "",
      "options": {
        "nestRemoting": true
      }
    },
    "service": {
      "type": "belongsTo",
      "model": "Service",
      "foreignKey": "",
      "options": {
        "nestRemoting": true
      }
    },
    "tags": {
      "type": "hasAndBelongsToMany",
      "model": "Tag",
      "foreignKey": "",
      "options": {
        "nestRemoting": true
      }
    }
  },
  "acls": [],
  "methods": {}
}

{
  "name": "Tag",
  "plural": "Tags",
  "base": "PersistedModel",
  "idInjection": true,
  "options": {
    "validateUpsert": true
  },
  "properties": {
    "name": {
      "type": "string",
      "required": true
    }
  },
  "validations": [],
  "relations": {},
  "acls": [],
  "methods": {}
}

而且它

具有ANDBELONGOMATANY

标记

这是

标签

型号

{
  "name": "Project",
  "plural": "Projects",
  "base": "PersistedModel",
  "idInjection": true,
  "options": {
    "validateUpsert": true
  },
  "properties": {
    "title": {
      "type": "string",
      "required": true
    },
    "description": {
      "type": "string"
    },
    "code": {
      "type": "string"
    },
    "startDate": {
      "type": "date",
      "required": true
    },
    "endDate": {
      "type": "date"
    },
    "value": {
      "type": "number"
    },
    "infoEN": {
      "type": "string"
    },
    "infoRU": {
      "type": "string"
    },
    "infoAM": {
      "type": "string"
    },
    "externalLinks": {
      "type": [
        "string"
      ]
    }
  },
  "validations": [],
  "relations": {
    "industry": {
      "type": "belongsTo",
      "model": "Industry",
      "foreignKey": "",
      "options": {
        "nestRemoting": true
      }
    },
    "service": {
      "type": "belongsTo",
      "model": "Service",
      "foreignKey": "",
      "options": {
        "nestRemoting": true
      }
    },
    "tags": {
      "type": "hasAndBelongsToMany",
      "model": "Tag",
      "foreignKey": "",
      "options": {
        "nestRemoting": true
      }
    }
  },
  "acls": [],
  "methods": {}
}

{
  "name": "Tag",
  "plural": "Tags",
  "base": "PersistedModel",
  "idInjection": true,
  "options": {
    "validateUpsert": true
  },
  "properties": {
    "name": {
      "type": "string",
      "required": true
    }
  },
  "validations": [],
  "relations": {},
  "acls": [],
  "methods": {}
}

现在，当关系被创建时，环回api给出了这个api端点

POST /Projects/{id}/tags

这将在标记集合中创建一个新标记，并将其添加到项目中。 但是向项目中添加一个已经存在的标记怎么样

所以我想我可能会在保存之前添加

钩子到

标签上

在这里，我将检查标记是否存在，然后将现有标记传递给关系

像这样的

tag.js

'use strict';

module.exports = function(Tag) {
  Tag.observe('before save', function(ctx, next) {
    console.log(ctx.instance);
    Tag.find({name: ctx.instance.name})
    next();
  });
  // Tag.validatesUniquenessOf('name', {message: 'name is not unique'});
};

---

@HaykSafaryan只是演示如何在项目中使用标记

var app = require('../../server/server');
module.exports = function(project) {
 var tag=app.models.tags
 //afterremote it just demo. you can use any method
 project.afterRemote('create', function(ctx, next) { 
 tag.find({name: ctx.instance.name},function(err,result)){
 if(err) throw err; 
  next()
 }    
 });
};

---

这只是一个示例代码，演示如何使用update、create、find、，upsertwithwhere等标记用于验证您必须在此处设置条件它不会接受您在标记模型中定义的验证

两个不同的api您不能合并2个api如果您使用关系，那么您将获得两个api的一些默认关系api，如项目api中的get post。但是，如果您想在项目中使用标记，可以在项目中使用类似于app.models.tag的内容来在内部使用标记模型project@bipin请你举个例子好吗？可能的副本