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  1. #1
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    Default Answered: Prevent Proxy from sending extra fields

    Answered: Prevent Proxy from sending extra fields


    Here is my model:




    Code:
    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
            }
        }
    });
    The model is being used in a Tree via a TreeStoreThe 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:




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

  2. I don't see a pleasant way to do this. I haven't tested it but I'd imagine something like this might work:

    Code:
    Ext.define('A.model.Group', {
        extend: 'Ext.data.Model',
        fields:['id', 'name'],
        ...
    });
    
    // Looks odd but this will cause the model's prototype to have the node fields added
    Ext.data.NodeInterface.decorate(Ext.create('A.model.Group'));
    
    A.model.Group.prototype.fields.each(function(field) {
        if (field.name !== 'id' && field.name !== 'name') {
            field.persist = false;
        }
    });

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