I would like to create a VF page and call a custom component inside it.

<apex:page controller="MyController">
<c:mycomponent id="myId" attributeName="{attributevalue}"/>

But this returns me: 'c:mycomponent' component cannot be nested within form tags'

I have tried to without the and call this page from another one using the tag, but it doesn't work either.

I read somewhere that is not possible to do what I need, but in the past I was allowed because I have some examples in my old code.

Is there a workaround now?

Thanks in advance

  • What API version is your page? – bigassforce May 17 '13 at 11:10

I think you need to check if c:mycomponent contains an apex:form tag and remove it.

Forms cannot be nested, and you can't cheat by wrapping it in a component ;-)

  • Possible workaround 1: mock out the apex:form with a plain vanilla form tag

  • Possible workaround 2: put component on a page in an apex:iframe to get the visual equivalent

| improve this answer | |
  • Yes, I have inside a form. I have added the code. And you are right, now it's not able to do it. But I have some old code with API 20.0 that allowed to me to do it. I was wondering if there was a workaround. – Agustina García May 17 '13 at 11:16
  • @AgustinaGarcía Can you replace the apex:form with just form? How about using an apex:iframe to give you the cosmetic equivalent without the nesting? – bigassforce May 17 '13 at 11:26
  • Thanks a lot, your answer helped me to solve some of my issues. But actually my error was that my component had a <apex:form> inside so, I was not able to call it from another <apex:form>. – Agustina García Jun 3 '13 at 7:16
  • N.B. while swapping the <apex:form> with <form> gets around the compile time error, you'll get a run time error such as Content cannot be displayed: <apex:selectList> (under <c:myComponent>) must occur between <apex:form></apex:form> tags. – cropredy Aug 12 '19 at 19:01
  • N.B. 2 - wrapping the custom component (if it has an apex:form therein) within an apex:iframe will not eliminate the compile time error in the OP – cropredy Aug 12 '19 at 19:08

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