VisualForce Field Level Error Message

Question

I have a few validation rules which display errors on fields. This is working fine for Standard Pages. But when these validations fail on a VisualForce page, the error messages show on the top of the page in "apex:messages". Is there a way to show these messages on the fields, without re-creating the validation checks in Apex or VisualForce page.

UPDATE: For example:

APEX:

public PageReference save() {
    try
    {
        //controller.save();
        update application;
    }
    catch(DmlException e)
    {
        application.addError(e);
        //ApexPages.addMessages(e);
        return null;
    }
    catch (Exception e)
    {
        //application.addError(e);
        ApexPages.addMessages(e);
        return null;
    }

    return null;
}

VISUALFORCE

<apex:outputpanel id="Messages">
    <strong><apex:messages style="color:red;"/></strong>
</apex:outputpanel>
<apex:inputField value="{!application.Field_Having_Validation_Rule__c}" />

Answer 1

You need to reference the id of the inputField element. You will have to create one apex:message for each field I think, not too sure can't remember.

<apex:inputField value="{!application.Field_Having_Validation_Rule__c}" id="Field_Having_Validation_Rule"/> 
...
<apex:message for="Field_Having_Validation_Rule" styleClass="errorMessage" />

Answer 2

You can find your solution here :

Field level error message

Check this one also VF field level error message

Answer 3

After a bit of trial and error of the Salesforce example:

Salesforce Field Validation Example

I figured out the following:

1. Anything in reRender attribute will cause the validation errors to NOT show.
2. The duplication of error message is a known issue with Salesforce apex:messages (Known Issue)

For the time being I will consider this as the best solution without any extra coding.

Please let me know if there is any other way of doing it.

Cheers