required=“true” throws validation error even multiselect picklist has values in Visualforce page

Question

I have used following code in my VF

<apex:pageBlockSectionItem > 
<apex:outputLabel value="!$ObjectType.C_FormObject__c.fields.C_Item_SL_JapaneseVisaApply__c.label}" />
<apex:inputField value="{!oFormobject.C_Item_SL_JapaneseVisaApply__c}" required="true" > </apex:inputField> 
</apex:pageBlockSectionItem>

But when i submit my form it throws validation error even it has value.

Answer 1

I know this is a bit stale. I just ran into the same issue and found that if I removed docType="html-5.0" I was able to successfully submit it.

Two examples - this one fails:

<apex:page standardController="Case" docType="html-5.0">
    <apex:form>
        <apex:pageBlock>
            <apex:actionRegion>
                <apex:inputField value="{!case.multiselect__c}" required="true">
                    <apex:actionSupport event="onchange" rerender="fields" immediate="true"/>
                </apex:inputField>
            </apex:actionRegion>
        </apex:pageBlock>
        <apex:commandButton action="{!save}" value="Save"/>
    </apex:form>
</apex:page>

This one passes:

<apex:page standardController="Case">
    <apex:form>
        <apex:pageBlock>
            <apex:actionRegion>
                <apex:inputField value="{!case.multiselect__c}" required="true">
                    <apex:actionSupport event="onchange" rerender="fields" immediate="true"/>
                </apex:inputField>
            </apex:actionRegion>
        </apex:pageBlock>
        <apex:commandButton action="{!save}" value="Save"/>
    </apex:form>
</apex:page>