1. #1
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    Default Override of Ext.data.Model

    Override of Ext.data.Model


    Hi community,

    I'm using Ext 4.0.7 and want to dynamically add columns to a grid view. Therefore, I also have to modify the connected store and model definitions. While fighting with the code I thougth it might work if I simply override the existing model and add some new fields.

    Consider the following model:
    Code:
    Ext.define('myModel', {
      extend: 'Ext.data.Model',
      fields: [
        { name: 'title', type: 'string', defaultValue: '' }
      ]
    });
    Now let's override the model:
    Code:
    Ext.override(myModel, {
      fields: [
        { name: 'title', type: 'string', defaultValue: '' },
        { name: 'subtitle', type: 'string', defaultValue: '' }
      ]
    });
    This did work, but if I then want to create a new model instance by
    Ext.create('myModel');
    I get the following error:

    fields is undefined
    [Break On This Error]
    length = fields.length;


    However, I solved that issue by redefining the model and extending from itself:
    Code:
    Ext.define('myModel', {
      extend: 'myModel',
      fields: [
        { name: 'title', type: 'string', defaultValue: '' },
        { name: 'subtitle', type: 'string', defaultValue: '' }
      ]
    });
    Can someone please tell me, why the override did not work or where I did a mistake?

  2. #2
    Sencha - Senior Forum Manager mitchellsimoens's Avatar
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    Default


    The fields are used in the onClassExtended method of Ext.data.Model so they are only used when they are extended.
    Mitchell Simoens @SenchaMitch
    Sencha Inc, Senior Forum Manager
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