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Here is part of my code which fails :

<aura:iteration items="{!v.layout}" var="item">
        <aura:if istrue="{!(item.elementType == 'HEADER') ? true : false}">

I tried rewriting this like this also :

 <aura:iteration items="{!v.layout}" var="item">
        <aura:if istrue="{!item.elementType == 'HEADER'}">

But i'm obtaining the same error. Seems like it don't like the item.elementType, where elementType is an attribute of the item instance.

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    Did you try this: <aura:if istrue="{!item.elementType == 'HEADER' ? 'true' : 'false'}">
    – Ashwani
    Commented Aug 2, 2016 at 8:16

2 Answers 2

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Why don´t you add directly a boolean variable to your attribute?

<aura:iteration items="{!v.layout}" var="item">
        <aura:if isTrue="{!item.isHeader}">}

Anyway the code your provided should work, I have some similar logic working in my org.

An other comment I want to add is that you should not add an aura:if as an immediate child of aura:iteration, because doing this will cause you unexpected issues due to a known bug in components.

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<aura:iteration items="{!v.layout}" var="item">
         <aura:if istrue="{!item.elementType == 'HEADER' ? 'true' : 'false'}">

Hope this would work.

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  • no it doesn't work. I think that it cannot get access to the elementType attribute , because layout is not defined initially as an array of which type of object. <aura:attribute name="layout" type="list" default="[]" description="The json template in the form of a map to generate the layout" />
    – vanessen
    Commented Aug 2, 2016 at 10:35
  • Please provide some description also.
    – Mr.Frodo
    Commented Aug 2, 2016 at 15:04

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