Ext.JS防止代理发送额外的字段 [英] Ext.JS Prevent Proxy from sending extra fields

问题描述

这是我的模型：

Ext.define('A.model.Group', {
    extend: 'Ext.data.Model',
    fields:['id', 'name'],
    proxy: {
        type: 'rest',
        url: '/group',
        reader: {
            type: 'json',
            root: 'data'
        },
        writer: {
            type: 'json',
            writeAllFields: false
        }
    }
});

模型正在树中通过TreeStore使用

The model is being used in a Tree via a TreeStore

问题是当一个 PUT ， POST 或 DELETE 方法是完成的，而不是仅从JSON有效载荷中的模型中发送字段，还会发送来自 Ext.data.NodeInterface 的字段。以下是一个示例负载：

The problem is that when a PUT, POST or DELETE method is done, instead of sending only fields from the model in the JSON payload, fields from Ext.data.NodeInterface are also sent. Here is an example payload:

{"id":"","name":"TestGroup","parentId":"8","index":0,"depth":3,"checked":null}

< >我不想要额外的字段 parentId ， index ， depth 和选中发送。什么是最好的方法呢？我不想在服务器上忽略它们。

I don't want the extra fields parentId, index, depth, and checked to be sent. What is the best way to do this? I don't want to have to ignore them on the server.

推荐答案

如果您不想只发送具体数据服务器，writeAllFields不是解决方案，就好像设置为false，它只发送修改的字段。
您的问题的解决方案是定义您自己的作者并覆盖方法 getRecordData 这里是一个可行的示例：

If you wan't to send only specific data to server, writeAllFields is not the solution as if is set to false it only sends the modified fields. The solution for your problem is defining your own writer and overriding the method getRecordData here is a posible example:

var newWriter = Ext.create('Ext.data.writer.Json',{
  getRecordData: function(record){
       return {'id':record.data.id,'name':record.data.name};
  }
})

Ext.define('A.model.Group', {
    extend: 'Ext.data.Model',
    fields:['id', 'name'],
    proxy: {
        type: 'rest',
        url: '/group',
        reader: {
            type: 'json',
            root: 'data'
        },
        writer: newWriter
    }
});

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