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Thread: Correct Way To Bind a Record to a Form?

  1. #1
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    Default Answered: Correct Way To Bind a Record to a Form?

    All,

    How do you bind a record to a form such that changes to the form fields modify the model?

    I see how you can call
    Code:
    form.setRecord(myRecord);
    , but that only manages getting the data out of the record into the form. Form -> record seems trickier, or at leas I see no automagical way to do it.

    The form documentation indicates that you can easily bind listeners to your form fields to auto-update on change, but it doesn't seem to be working. The part that isn't working is here:

    Code:
    var form = Ext.create('Ext.form.Panel', {
        listeners: {
            '> field': {
                change: function(field, newValue, oldValue) {
                    ed.set(field.getName(), newValue);
                }
            }
        },
        items: //as before
    });
    am i doing something weird, or does the above work for everyone? In the meantime, I've written this function in the form's initializer that does the same thing, but not nearly so elegantly.

    Code:
        initialize: function()    {
            Ext.each(this.query('> fieldset field'), function(field)
            {
                field.on('change', function(field, newValue, oldValue)
                {
                    this.getRecord().set(field.getName(), newValue);
                }, this);
            }, this);
        }
    Is there a better way?

    Thanks!

  2. You can use the updateRecord method on the form panel. This will go through all your fields and try to set the field value onto the record field. This updateReocrd method for some reason is not documented anymore, it was documented in past releases so I'm going to open a bug for that. Usage would be:

    Code:
    formpanel.updateRecord(formpanel.getRecord());

  3. #2
    Sencha - Sr Software Engineer mitchellsimoens's Avatar
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    Default

    You can use the updateRecord method on the form panel. This will go through all your fields and try to set the field value onto the record field. This updateReocrd method for some reason is not documented anymore, it was documented in past releases so I'm going to open a bug for that. Usage would be:

    Code:
    formpanel.updateRecord(formpanel.getRecord());
    Mitchell Simoens @LikelyMitch
    Sencha Inc, Senior Software Engineer
    ________________
    Learn BBCode and use it! Checkout the CODE tag!

    Check out my GitHub, lots of nice things for Ext JS and Sencha Touch
    https://github.com/mitchellsimoens

  4. #3
    Sencha Touch Premium User
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    Default

    If the documentation for forms':

    Code:
    var form = Ext.create('Ext.form.Panel', {
        listeners: {
            '> field': {
                change: function(field, newValue, oldValue) {
                    ed.set(field.getName(), newValue);
                }
            }
        },
        items: //as before
    });
    is wrong, would you add a bug to fix that also?

    Thanks, Mitchell!

    John

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