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Posts tagged Model
ExtJS 4: Querying Records in a Data Store
Feb 19th
As you come to use data stores regularly within ExtJS applications, you’ll quickly come to realize just how powerful they are. With very little code, you can create robust data repositories that can not only store complex data, but can (perhaps more importantly) drive components within your applications.
At some point, however, you’ll need to retrieve data from your Store in a query-like manner. That is, instead of looking up a record by a known ID or position within the store, you may need to find one or more records based on a search term, a category, or whatever else is required by your app.
Of course, as with everything else, ExtJS makes this pretty simple. Let’s suppose that we have the following Model:
Ext.define("MyApp.model.Bookmark", {
extend: "Ext.data.Model",
idProperty: "id",
fields: [
{name: "id", type: "int"},
{name: "target", type: "string"},
{name: "title", type: "string"},
{name: "category", type: "string"},
{name: "created", type: "date"}
]
});
Nothing to crazy here. Just a simple model with some standard kinds of fields for storing data, in this case, “bookmarks.” Now, let’s More >
ColdFusion Queries to ExtJS Data Models
Jan 8th
I love data Models in ExtJS. They are extremely simple to use, but are amazingly powerful for driving robust JavaScript applications. In fact, I’ve gotten to the point where I use them in just about everything I do, and they are fast becoming an indispensible part of my JavaScript development approach.
A big part of the appeal of ExtJS data Models is their flexibility. While some data “plugins” in other JS frameworks certainly allow you mimic some of the behaviors of a data model, ExtJS’ data Model wins hands down because of its extreme flexibility. With a ExtJS Model, you can quickly and easily create powerful definitions of data objects (fields, data types, associations, validations, etc.) in your application. These models can then in turn be used to craft a data Store, which can themselves be plugged into many of ExtJS’ data components (DataView, Grid, Chart). What you end up with is a super-powerful, deeply-data-driven application in a ridiculously small number of lines of code.
Of course, the perfect complement to the simplicity and grace of ExtJS’s data Model is to “feed” it using ColdFusion. Below, I’ll outline how to retrieve data from CF, as well an extremely easy way (there are More >
