Expected behavior

No alerts for arrays.

Actual behavior

Rails/PluckId raises an alert when using pluck(:id) with array collections.
Arrays does not support .ids, that only works for ActiveRecord::Relation collections.

Steps to reproduce the problem

I have this code:

array = [{ id: 1 }, { id: 2 }]
extracted_ids = array.pluck(:id)

Rubocop suggestion:

Rails/PluckId: Use ids instead of pluck(:id).
    extracted_ids = array.pluck(:id)
                          ^^^^^^^^^^

Updated code:

array = [{ id: 1 }, { id: 2 }]
extracted_ids = array.ids

Then it produces the following error:

NoMethodError: undefined method `ids' for [{:id=>1}, {:id=>2}]:Array

RuboCop version

bundle exec rubocop -V
0.88.0 (using Parser 2.7.1.4, rubocop-ast 0.2.0, running on ruby 2.7.1 x86_64-linux)