Select a value from a variable

Question

In Extjs, I am trying to select a value accrued from a variable Store.

enter image description here

I tried:

var newStore = Store.data.items[0].data.accrued;

The above one is not working. I am getting error:

Uncaught TypeError: Cannot read property 'data' of undefined

Whenever I add items[0], it is making the variable undefined.

When I checked:

var newStore = Store.data.items.length;

output is: 0 //?

But I can see that there are items in Store variable here as shown in the above image. Anyway, I just want to get the value of accrued from the variable Store.

I also checked:

var newStore = Store.data.items;

output is: [ ]

Try for(x in Store.data.items) console.log(x); to make sure the index is indeed 0 ? — techfoobar
@techfoobar It is not showing anything because Store.data.items is [ ] (I don't know how). — Mr_Green
I don't know if this will be helpful but try this Ext.getStore('store_id').data.items[0].data.accrued — cclerv

sra sra · Accepted Answer · 2013-03-13T07:42:53

Hey Mr_Green you should look into the API sometimes, cause this is really straight forward ;) Store load event

Store.on('load', function(store,records){ 
    records[0].data.accrued; 
}, this, {single:true})

Update - a bit more in depth

The tiny word on applies a listener for a event to a component. It will be available for classes that mixin Ext.util.Observable where the last argument I applied identifies that this listener should get removed after it get called once. This is useful for anonymous listeners cause you cannot unregister them otherwise.

load( this, records, successful, eOpts )

Parameters

this : Ext.data.Store
records : Ext.data.Model[] An array of records
successful : Boolean True if the operation was successful.
eOpts : Object The options object passed to Ext.util.Observable.addListener.

So the records argument contains all the records that are returned by the current load operation.

Select a value from a variable

2 Answers