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  • Ext.data.DataWriter Example

    Ext.data.DataWriter Example

    This example shows how to implement a Writer for your Store. A Writer-enabled Store frees you from having to manually compose Ajax requests to perform CRUD actions on a Store.

    Note that the js is not minified so it is readable. See writer.js, UserForm.js and UserGrid.js.

    The HttpProxy plugged into the store in this example uses the new api configuration instead of an url. A simple MVC-like php backend has been created for this example which simulates a database by storing records in $_SESSION. See the file /remote/app/controllers/users.php. You may have to configure your web-server to allow scripts to be executed in the /examples directory.

    var proxy = new Ext.data.HttpProxy({    api: {        read    : 'app.php/users/read',        create  : 'app.php/users/create',        update  : 'app.php/users/update',        destroy : 'app.php/users/destroy'    }});

    Take note of the requests being generated in Firebug as you interact with the Grid and Form.

    An Error has been simulated on the server-side: Attempting to update a record having ODD-numbered id will generate this errror. Responses from the update action will have successProperty === false along with a message. This error can be handled by listening to the "exception" event upon your Store.

    exception : function(proxy, type, action, options, res, arg) {    if (type === 'remote') {        Ext.Msg.show({            title: 'REMOTE EXCEPTION',            msg: res.message,            icon: Ext.MessageBox.ERROR        });    }}

    Note: This new "exception" event supercedes the old loadexception event which is now deprecated.

    User -- All fields are required
    Users
       
       
       
     
       
       
       
     
    ID
    Email
    First
    Last
    1
    fred@flintstone.com
    Fred
    Flintstone
    2
    wilma@flintstone.com
    Wilma
    Flintstone
    3
    pebbles@flintstone.com
    Pebbles
    Flintstone
    4
    barney@rubble.com
    Barney
    Rubble
    5
    betty@rubble.com
    Betty
    Rubble
    6
    bambam@rubble.com
    BamBam
    Rubble
     
     
    @cfg:
     
       
       
       
     
       
       
       
     
       
       
       
     

    http://dev.sencha.com/deploy/dev/examples/writer/writer.html

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  • 原文地址:https://www.cnblogs.com/Leo_wl/p/1818703.html
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