How to validate the model, whether it is having particular column or not?

class Project
  include Listable
       
  listtable(data_attribute: :verified_at)
end

Concern

module Listable
  class_methods do
    def listable(data_attribute: :verified_at)
      raise ActiveModel::MissingAttributeError, 
        "Must have a verified_at attribute"  unless respond_to?(:verified_at)
    end
  end
end

In my project model i am having column verified_at. if i am not having verified_at column in my table it should raise the error.

But here it is not responding properly. always raising the error(even the verified_at is present also)

Expected

Wherever i am including this concern in my model, it should check the verified_at column is present or not. If it is not present, should raise the error.

It is not happening for me, Please suggest me any solution, Thanks in advance

The problem is that the model doesn't respond_to? in the way you expected it to do.

Project.respond_to?(:id)
# false

why? because you are asking the class itself if it has the id attribute, that only works on an instance.

Project.first.respond_to?(:id)
# true

To work around this you can take advantage of the Project.column_names method, like this.

raise ActiveModel::MissingAttributeError, 
    "Must have a verified_at attribute" unless column_names.include?('verified_at')