How do I access a Rails model in a rake file outside of rake tasks?

To access Rails models in a rake task, you specify :environment

as a dependency. But what if you want to have a dynamic description of your task and they depend on some database date. For example:

end_date = Foo.end_date # the model foo provides some end date

desc "Do something after #{end_date}"
task bar: :environment do
  ...
end

      

        
        
        
      

    

I tried Rake::Task[:environment].invoke

but get it Don't know how to build task 'environment'

.