ExtJS 4 - Json Writer does not have Record config like Json Reader does

Question

Ok guys, working ExtJS4 and I have pretty much the exact opposite problem this guy did:
How do I get an ExtJS JsonStore to put the JSON data directly into the request body?

In my application I have a nested data structure being loaded with associated models.

CakePHP in the backend expects (in pseudocode) the following format in saves:

[
  {
    [Model]
      [Field1]: [Value1],
      [Field2]: [Value2],
      [Field3]: [Value3]
  },
  {
    [Model]
      [Field1]: [Value1],
      [Field2]: [Value2],
      [Field3]: [Value3]
  }
]

This is what ExtJS is currently sending to the server:

[
  {
    [Field1]: [Value1],
    [Field2]: [Value2],
    [Field3]: [Value3],
    [Model] : null
  }
]

So, for some reason it's including the model as a null value and putting the parameters in the root node of the Json object.

The server sends the data to the client in a similar fashion but the Json Reader for the Json Proxy has a record parameter (See here). Unfortunately the Json Writer has no such property (not even undocumented as I have tried setting it).

Currently my workaround on the back end is:
$json = Set::insert($json, 'Model', $json);
But it would be good if there was a better way to accomplish this.

Update: To further expand, I am loading one store which loads nested Json data that automatically populates associated models in the client. (This is all done with Extjs methods without any custom code).

I have tried the root property in the Json writer but unforunatly with batch records it formats the request like this:

{
  [Root] : [
    {
      [Field1]: [Value1],
      [Field2]: [Value2],
      [Field3]: [Value3],
      [Model] : null
    },
    {
      [Field1]: [Value1],
      [Field2]: [Value2],
      [Field3]: [Value3],
      [Model] : null
    }
  ]
}

I have also tried Bancha (http://banchaproject.org) but I was unable to get that to work with Sencha Architect (which is being used for this project) and the solution they have provided at the moment was a "workaround" (which I was unable to get working).

Thank you, -T6

Roland Schütz Roland Schütz · Accepted Answer · 2013-01-06T02:23:27

The thing with the modelName:null looks like you have some custom code already here. To just get the data in a named object, the Writer has a property 'root' in ExtJS and 'rootProperty' in Sencha Touch, this could help.

There's also a framework which does all of this marshaling for you, see banchaproject.org It costs a bit, similar to ExtJS, but it will do a lot of this work for you.

ExtJS 4 - Json Writer does not have Record config like Json Reader does

2 Answers