1

I'm getting an error when I supply the list property acc.Contacts to the aura iteration component.

<aura:application>
    <aura:attribute name="acc" type="Account" 
        default="{ 
            'sobjectType': 'Account',
            'Contacts': [{'sobjectType': 'Contact', 'Name': 'test'}]
        }"
   />

    <aura:iteration items="{!v.acc.Contacts}" var="contact">
        <span>
            {!contact.Name}
        </span>
    </aura:iteration>
</aura:application>

Result: "Something has gone wrong. [NoErrorObjectAvailable] Aura.loadComponent(): Failed to initialize application."

Is iterating over a list property not supported?

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3
  • do you want to iterate a nested property (Contacts) in an object?
    – Praveen
    Commented Jul 12, 2016 at 18:03
  • @Praveen yes I want to iterate over acc.Contacts
    – bafuda
    Commented Jul 12, 2016 at 18:10
  • I contacted Salesforce support and they're looking into the issue. Their comment is: "This occurs because It appears that the default attribute on aura:attribute is creating a String value for non-String Collection types. As another test, modifying the code to use a String Collection still including the default="" will work as expected. <aura:attribute name="recentAccounts" type="String[]" default="" /> Works."
    – bafuda
    Commented Jul 27, 2016 at 17:39

2 Answers 2

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1

Not sure what your trying to do, but type='Account' maps to an sObject Account instance, and clearly it does not contains Contacts field/property.So changing the type to Map makes it to work. 

<aura:attribute name="acc" type="Map" 
    default="{ 
    'sobjectType': 'Account',
        'Contacts': [{'sobjectType': 'Contact', 'Name': 'test'}]
    }"
/>
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4
  • Using a map is great workaround thanks. I'm trying to iterate over the Contacts property. This is a valid property of an account object (this is valid Apex): List<Contact> contacts = [select (select Id from Contacts) from account limit 1].Contacts;
    – bafuda
    Commented Jul 12, 2016 at 18:21
  • But it doesn't directly belong to Account object like other fields Name,Email,...so on. For ex: This is valid Account a = new Account(Name = 'test'); not this Account a = new Account(Contacts = new Contact[]{new Contact(LastName='test')});
    – Praveen
    Commented Jul 12, 2016 at 18:33
  • Because Contacts it is an special non-writable property returned by the SOQL query only, as far as i know.
    – Praveen
    Commented Jul 12, 2016 at 18:38
  • I think it is still a property of an account object, it's just not a property that can be modified or set. Maybe it's just not readable in this context. That should be called out in the documentation though I think.
    – bafuda
    Commented Jul 12, 2016 at 18:39
1

The work around I'm currently using is to assign acc.Contacts to a component attribute

<aura:application>
    <aura:attribute name="acc" type="Account" 
        default="{ 
            'sobjectType': 'Account',
            'Contacts': [{'sobjectType': 'Contact', 'Name': 'test'}]
        }"
    />
    <aura:attribute name="contacts" type="Contact[]" 
        default="{!v.acc.Contacts}"
    />

    <aura:iteration items="{!v.contacts}" var="contact">
        <span>
            {!contact.Name}
        </span>
    </aura:iteration>
</aura:application>
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