ExtJS Ext.data.JsonStore loadData

extjs jsonstore loaddata

17,788

Solution 1

Thanks for your replies, they were useful in sending me down the right path. I was able to get my original example to work by removing the 'data' field. I'm guessing it was causing conflicts when I tried to call loadData. Solution listed beflow

    function example() {
        var exampleData = {'exampleJSON' : {'exampleArray':[{'exampleID':1,'name':'Fred','description':'a guy'},{'exampleID':2,'name':'sue','description':'a girl'}]}};

        var exampleStore = new Ext.data.JsonStore({
            autoLoad: false,
            root: "exampleJSON.exampleArray",
    fields: [
          {mapping: "exampleID", name:"exampleID"},
          {mapping: "name", name:"name"},
          {mapping: "description", name:"description"}
    ],
            listeners: {
                 load: function (oStore, ayRecords, oOptions ) 
         {
             alert('loaded successfully: ' + ayRecords.length);
         }
            }
        });

        exampleStore.loadData(exampleData);  
    }

Solution 2

Your code is wrong in a number of places:

Ext.define('MyModel', {
    extend: 'Ext.data.Model',
    fields: ['exampleID', 'name', 'description']
});

function example() {
    var exampleData = [{
        exampleID: 1,
        name: 'Fred',
        description: 'a guy'
    }, {
        exampleID: 2,
        name: 'sue',
        description: 'a girl'
    }];

    var exampleStore = new Ext.data.Store({
        model: 'MyModel',
        data: exampleData
    });
}

Also, there's no ext-base file for Ext 4, so it's a redundant include.

17,788

Author by

abeauchamp

Developer in the following platforms: Android, C#, Java, Unity, PHP

Updated on June 04, 2022

Comments

abeauchamp almost 2 years

Can you help me solve the issue I'm running into with the loadData function as part of the Ext.data.JsonStore? I've created a basic example of the problem I'm running into:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
    <title>Ext JSON example</title>
     <script type="text/javascript" src="lib/ext-base.js"></script>
    <script type="text/javascript" src="lib/ext-all.js"></script>
<script>
    function example() {
        var exampleData = "{'exampleJSON' : {'exampleArray':[{'exampleID':1,'name':'Fred','description':'a guy'},{'exampleID':2,'name':'sue','description':'a girl'}]}}";

        var exampleStore = new Ext.data.JsonStore({
            data: new Ext.data.MemoryProxy(exampleData),
            autoLoad: false,
            root: 'exampleJSON.exampleArray',
    fields: [
          {mapping: "exampleID", name: 'exampleID'},
          {mapping: "name", name: 'name'},
          {mapping: "description", name: 'description'}
    ],
            listener: {
                 load: function (oStore, ayRecords, oOptions ) 
         {
            alert('loaded successfully');
         }
            }
        });

        exampleStore.loadData(exampleData);  
    }

</script>
</head>
<body>
<center><button onclick="example();">Click for Example</button></center>
</body>
</html>

The problem I'm running into is I'm getting this error reported by Firebug: obj.exampleJSON is undefined This is likely being caused when I set the root as 'exampleJSON.exampleArray'. Can someone help point out what I'm doing wrong?

(using ExtJs 4.1.0)

Thanks guys.

EDIT: to set this up, place ext-all.js and ext-base.js in a lib folder.

abeauchamp almost 12 years

Thanks for the response. Do I have to define a model? I was trying to avoid defining a model because the actual json structure I'm using is far more complex filled with nested lists and 60+ fields.
Evan Trimboli almost 12 years

You can specify the fields inline on the store, but under the hood it just creates a model. Even if you do specify the fields on the store, it's not really any shorter to do so.
Eydun about 11 years

You should add the fields in the model, inside the config.