Custom fields are not getting query from Custom Object after installing a 2GP managed package

Question

I have created a 2GP-managed package that includes an Apex class with SOQL queries. But from one SOQL query, which is on a custom object, I am unable to get the data for custom fields from that custom object. I am able to get standard fields from that same custom object. I am just getting blank fields in the Lightning data table.

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Answer 1

In the Lightning Datatable Columns, you have missed to add your namespace to the API Name of the fields.

For Example, if your namespace is "testingabc". Any custom field added in the package will have api name as testingabc__fieldapiname__c.

Try adding the datatable columns like this:

[
{ 
      label: "Status", 
      fieldName: "namespace__Workbench_Status__c", 
      type: "text", 
      initialWidth: 180 
}, 
{ 
      label: "In Use", 
      fieldName: "namespace__Used__c", 
      type: "boolean", 
      initialWidth: 70 
}
]