Hello,
This is related to trailhead Lightning components: Attributes and Expressions. While saving below code for the lightening component for the challenge in devloper console. I am getting error: FIELD_INTEGRITY_EXCEPTION: "Failed to save undefined: null: Source". If I replace the outputCurrency and ouptutNumber tag with outputText then it get saved. But that does not meet the challenge. Can someone please advise?

<aura:component >
    <aura:attribute name="item" type="Camping_Item__c" required="true"/>
    <p>Name:
    <ui:outputText value="{v.item.Name}"/> 
    </p>
    <p>
    Price:
    <ui:outputCurrency value="{v.item.Price__c}"/> 
    </p>
    <p>
    Quantity:
    <ui:outputNumber value="{v.item.Quantity__c}"/>
    </p>
    <p>
    Packed:
    <ui:outputCheckbox value="{v.item.Packed__c}"/>
    </p>
</aura:component>

Thanks,
Kuldeep

I have done everything but I still get this error that is not helpful becauseI have done what it asks.

Challenge Not yet complete... here's what's wrong:
Either the contact object does not have a compact layout named 'Phone and Email', or it is not set as the primary compact layout

1. I created a custom object 'Contact'
2. I created custom fields of name (text), phone (phone type), mobile (phone type), and email (text type).
3. Then I made a new custom compact layout called 'Phone and Email'
4. I make 'Phone and Email' my primary compact layout

What did I do wrong?? Am I missing a step?? Please help.

Hi, I am having trouble with the "Attributes and Expressions" module from trailhead.

Here is the challenge:
Create a Lightning Component to display a single item for your packing list.

• Create a component called campingListItem that displays the name (ui:outputText) and the three custom fields using the appropriate output components.
• Add an attribute named 'item' for type Camping_Item__c.

I created an component named campingListItem and this is the code:

<aura:component >
    <aura:attribute name="item" type="<my_domain>__Camping_Item__c"/>
    
    <ui:outputText value="{!v.item.Name}"/>
    <ui:outputCheckbox value="{!v.item.<my_domain>__Packed__c}"/>
    <ui:outputCurrency  value="{!v.item.<my_domain>__Price__c}"/>
    <ui:outputNumber value="{!v.item.<my_domain>__Quantity__c}"/>
</aura:component>

The error that I am getting is: "Challenge Not yet complete... here's what's wrong: 
The packingListItem Lightning Component's attribute tag doesn't exist or its attributes are not set correctly."

With this, I tried to create another component, with the name "packingListItem", but It didn't work.

Can anyone help me?

Thanks,

The challenge is:

You've been given a requirement to keep Contact addresses in sync with the Account they belong to. Use Process Builder to create a new process that updates all child Contact addresses when the address of the Account record is updated. This process:Can have any name.
Must be activated.
Must update Contact mailing address fields (Street, City, State, Post Code, Country) when the parent Account shipping address field values are updated.

I start with Accounts when records is created or edited.
Filter criteria where accounts shipping address (street, city, state, zip code) is changed (used "or" logic).

I am stuck on the next step "add action".  I started with action type "Update Records".
On objects, I can't seem to change Accounts to Contacts.  Why?

I'm doing the simple lightning components challenge and have hit this problem in my existing trailhead org and a brand new dev org that I've just created:

Challenge not yet complete... here's what's wrong: 
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: QVWBQHAG