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  1. #1
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    Question LocalStorage for Application Settings, and remove

    LocalStorage for Application Settings, and remove


    Hi,

    I'm trying to store application settings in a the browser (HTML5 local storage) and I have difficulties to figure out a way to load and save settings without getting more than Store item. What I'm really trying to achieve is to have a single "Account" object, that gets updated with a settings FormPanel (and when the application launches the first time, the user is automatically prompted for settings). I haven't been able to find a way to reuse a Model, so I decided to go with a non-reusable Model: when the user save settings, the app delete the old Model and create a new one. But, for a strange reason, the Model never gets deleted...

    Here is an example. The account object is still in the Local Storage at the end.

    Code:
    Ext.setup({
        icon: 'icon.png',
        tabletStartupScreen: 'tablet_startup.png',
        phoneStartupScreen: 'phone_startup.png',
        glossOnIcon: false,
    
        onReady: function() {
            Ext.regModel('Account', {
                fields: [
                    {name: 'username', type: 'string'},
                    {name: 'password', type: 'password'}
                ],
    
                proxy: {
                    type: 'localstorage',
                    id  : 'testapp-account'
                }
            });
           
            var store = new Ext.data.Store({
                model: "Account"
            });
            store.load();
    
            var account = store.first();
            if (!account) {
              store.add({username: 'test', password: '12345'});
              store.sync();
    
              account = store.first();
            }
    
            store.remove(account);
            store.sync();
       }
    });
    Thanks for your help.

  2. #2
    Sencha - Training Team mrsunshine's Avatar
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    Default


    I did a user setting saving in localstorage in my chat example application. it also shows the settings dialogbif no data is stored.

    me it help you to look n the code of my app

    https://github.com/mrsunshine/Mobile...s---socket.io-

  3. #3
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    Thanks for this. I try, but it looks like you have the same problem I have. Removing configuration doesn't work, it looks like a Sencha Touch bug.

    Steps to reproduce with your App:
    1. Clean localstorage, launch app
    2. Save settings
    3. Reload app
    4. Go to settings, change something, save
    5. The localstorage now contains 2 items...

    Code:
    chat-settings-counter: 2
    chat-settings-2: {"server":"localhost","nickname":"test125","email":"me@example.com","gravatar":"..."}
    chat-settings-1: {"server":"localhost","nickname":"test123","email":"me@example.com","gravatar":"..."}
    chat-settings: 1,2

  4. #4
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    It seems you have to add a field with name "id" and type "int" to your model. This field gets populated by sencha touch and from a quick look at the code it seems that the remove function uses this field to identify the model instance to remove.

    Hope it helps.

    Chummy

  5. #5
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    Yes, it work, thanks

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    Default Still have problem when update then delete. The data in localstorage can't be load

    Still have problem when update then delete. The data in localstorage can't be load


    1. The localstorage is empty:
    2. Insert 3 records into localstorage:
    3.Update a record, then the "clients" going wrong:
    4.Delete the record updated:
    5.The data in localstorage can't be load automatically.
    l1.jpgl2.jpgl3.jpgl4.jpg
    Last edited by jianbinjblin; 2 Jun 2012 at 3:25 PM. Reason: Images pasted are losted.

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