[Fix #504] Rails/FindBy being wrongly triggered on non Active Record methods

lib/rubocop/cop/rails/find_by.rb

@@ -32,8 +32,9 @@ class FindBy < Base
         RESTRICT_ON_SEND = %i[first take].freeze
 
         def on_send(node)
-          return unless (receiver = node.receiver)
-          return if receiver.block_type? || ignore_where_first? && node.method?(:first)
+          receiver = node.receiver
+          return unless receiver&.method?(:where)
+          return if ignore_where_first? && node.method?(:first)
 
           range = range_between(node.receiver.loc.selector.begin_pos, node.loc.selector.end_pos)
 

spec/rubocop/cop/rails/find_by_spec.rb

@@ -67,4 +67,24 @@
       expect_no_corrections
     end
   end
+
+  context 'when receiver is not an Active Record' do
+    context 'when method is Array#take' do
+      it 'does not register an offence' do
+        expect_no_offenses(<<~RUBY)
+          array = Array.new(1) { rand }
+          array.compact.take
+        RUBY
+      end
+    end
+
+    context 'when method is Array#first' do
+      it 'does not register an offence' do
+        expect_no_offenses(<<~RUBY)
+          array = Array.new(1) { rand }
+          array.compact.first
+        RUBY
+      end
+    end
+  end
 end