在环回中保存多个模型 [英] Save multiple models in loopback

问题描述

我正在研究回送，想知道是否可以从一个请求中保存到多个模型.说..一个帖子有很多带有很多图像的标签.用户表单将具有以下内容:

I'm doing research on loopback and was wondering if it's possible to save to multiple models from one request. Say.. an Post has many Tags with many Images. A user form would have the following:

• 帖子标题
• 帖子说明
• 标签名称(一个多字段.例如:['Sci-Fi'，'Fiction'，'BestSeller']
• 图像文件(希望处理上传到AWS的文件，也许使用skipper-s3吗?)

我如何能够在这样的多个模型上坚持下去?这是您用钩子做的事吗?

How would I be able to persist on multiple models like this? Is this something you do with a hook?

推荐答案

您可以创建 RemoteMethods 在模型中，它可以定义参数，因此在您的示例中，您可以在Post模型中创建以下内容:

You can create RemoteMethods in a Model, which can define parameters, so in your example you could create something like this in your Post model:

// remote method, defined below
Post.SaveFull = function(title, 
        description,
        tags,
        imageUrl,
        cb) {

    var models = Post.app.Models; // provides access to your other models, like 'Tags'

    Post.create({"title": title, "description": description}, function(createdPost) {
         foreach(tag in tags) {
             // do something with models.Tags

         }
         // do something with the image

         // callback at the end
         cb(null, {}); // whatever you want to return
    })

}

Post.remoteMethod(
    'SaveFull', 
    {
      accepts: [
          {arg: 'title', type: 'string'},
          {arg: 'description', type: 'string'},
          {arg: 'tags', type: 'object'},
          {arg: 'imageUrl', type: 'string'}
        ],
      returns: {arg: 'Post', type: 'object'}
    }
);

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