@save"
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'''Target Attribute:''' any save-allowed attributes (except viewModel, validationMessages) | '''Target Attribute:''' any save-allowed attributes (except viewModel, validationMessages) | ||
| − | '''Purpose:''' Restrict binder to save data to ViewModel only, | + | '''Purpose:''' Restrict binder to save data to ViewModel only, no loading. |
You usually use this syntax when you want to save and load data in different conditions, you should write both <tt> @save </tt> and <tt> @load </tt> in an attribute. You have to use it in form binding to save upon a command. | You usually use this syntax when you want to save and load data in different conditions, you should write both <tt> @save </tt> and <tt> @load </tt> in an attribute. You have to use it in form binding to save upon a command. | ||
Revision as of 07:04, 10 February 2012
Syntax
@save( [EL-expression], [conditionKeyword]=[EvaluateOnce EL-expression] )
Description
Target Attribute: any save-allowed attributes (except viewModel, validationMessages)
Purpose: Restrict binder to save data to ViewModel only, no loading.
You usually use this syntax when you want to save and load data in different conditions, you should write both @save and @load in an attribute. You have to use it in form binding to save upon a command.
- [conditionKeyword]=[EvaluateOnce EL-expression]
- This expression is optional unless you want to save or load upon a command.
- [conditionKeyword]
- It could be one of [ before | after ]
- [EvaluateOnce EL-expression]
- The evaluation result must be one or more command name.
- Command name must correspond to the name specified in Java annotation @Command in a ViewModel.
Example
Basic usage
<textbox value="@load(vm.person.name) @save(vm.person.name, before='save')"/>
<textbox value="@load(vm.person.name) @save(vm.person.name, before={'save', 'update'})"/>
Saving and loading form attribute'
<textbox value="@save(vm.number) @load(vm.number, after='cmd')" />
Version History
| Version | Date | Content |
|---|---|---|
| 6.0.0 | February 2012 | The MVVM was introduced. |