ExtJS Search Datastore for value

Question

How do I search a datastore for a specific record? I've tried find() and findBy(), but both return -1.

var index = clientStore.find('ClientID', '37');

I have a combo box with a list of clients. What I want is to be able to set a default value on that combo. I have the value setting correctly using setValue and I can even set the display value using setRawValue, but I can't seem to query the datastore based on the clientID and get the company name to use in setRawValue.

Does that make sense?

Here's the datastore code in response to the questions below (sorry it wouldn't let me paste it there)

var frmClientStore = new Ext.data.Store({
    id: 'frmClientStore',
    proxy: new Ext.data.HttpProxy({
        url: 'url here', 
        method: 'POST'
    }),
    reader: new Ext.data.JsonReader({
        root: 'rows',
        id: 'recordID'
    },[
        {name: 'recordID', type: 'int', mapping: 'recordID'},
        {name: 'ClientID', type: 'int', mapping: 'clientID'},
        {name: 'CompanyName', type: 'string', mapping: 'companyName'}
      ])
});

Answer 1

There are several problems with your configuration. First of all the id-property of the read should be the idProperty-property. The the id-property of the store should be the storeId-property (id is deprecated). And then your variable is called frmClientStore while you're referencing clientStore in your code (might be a typo).

var frmClientStore = new Ext.data.Store({
    storeId: 'frmClientStore',
    proxy: new Ext.data.HttpProxy({
        url: 'url here', 
        method: 'POST'
    }),
    reader: new Ext.data.JsonReader({
        root: 'rows',
        idProperty: 'recordID'
    },[
        {name: 'recordID', type: 'int', mapping: 'recordID'},
        {name: 'ClientID', type: 'int', mapping: 'clientID'},
        {name: 'CompanyName', type: 'string', mapping: 'companyName'}
      ])
});

And finally: are you sure, your store has been loaded when you try to retrieve records from it?

Try

frmClientStore.load({
    callback: function(rs) {
        console.log(rs);
        console.log(this.find('ClientID', '37'));
    }
});