How do I fix the error when adding Custom Settings?

Question

My task is to create an LWC component and then add it to a managed package. I was told that to store the API and the key to it, you should use Custom Settings and Custom Metadata Types. No more specifics. Since I'm new, I assumed that the API should be stored in Custom Settings, and the key in Custom Metadata Types.

I added a new entry in Custom Settings:

Next, I try to add a new field and get an error. I understand that this is not how I write the path to my Custom Metadata Types record? Here is my formula:

"the_api_is_specified_here" + $CustomMetadata.Weather_api_key__mdt.key__c

In here is my Custom Metadata Types record (which I am trying to refer to at the end of the formula):

Maybe I'm wrong and I need to implement it in a different way?

Answer 1

You are mixing CustomSettings and CustomMetadataType in your setup. It looks as if you wish to use CustomMetadataType and I recommend that.

Your formula to retrieve the key__c from Weather_api_key (CustomMetadataType) should be:

$CustomMetadata.Weather_api_key__mdt.First_Key.key__c

Your formula to retrieve the key__c from weatherAPI__c (CustomSetting) should be:

$Setup.weatherAPI__c.key__c