问题
I asked my question here but I think it lacks some obvious information. Hence I'm posting my question again.
I have a JSF form which has some required validation on h:inputText fields. When submitting the form I want to skip(or ignore) the required validation check and still invoke the application. I do want to do the form data validation and show the errors based on some condition.
Basically I want to skip the validations and invoke the application when the form is submitted using an ajax call and do the validation when the form is submitted via clicking a submit button.
回答1:
Just put that condition straight in the required attribute.
<h:inputText ... required="#{someCondition}" />
It namely just accepts any EL expression like as many other attributes. Many starters think that you can only hardcode a "true" or "false" string in it. This is untrue.
For example, when you want to let it evaluate true only when the save button is actually pressed:
<h:inputText ... required="#{not empty param[save.clientId]}" />
...
<h:commandButton value="Cancel" ... />
<h:commandButton binding="#{save}" value="Save" ... />
(note: code is complete as-is, you do not need to bind it to a bean property)
This way the required attribute only evaluates true when the save button is pressed and it evaluates false for any other button or ajax event listener.
来源：https://stackoverflow.com/questions/19712743/skip-required-validation-and-invoke-the-application