Fix a false positive for RedundantActiveRecordAllMethod

Resolves rubocop#1114 (comment)

This PR fixes a false positive for `RedundantActiveRecordAllMethod`
when using `find` with block argument.

`Enumerable#find` and `ActiveRecord::Base#find` have different arguments,
So false positives can be prevented.

changelog/fix_a_false_positive_for_rails_redundant_active_record_all_method.md

@@ -0,0 +1 @@
+* [#1126](https://github.com/rubocop/rubocop-rails/pull/1126): Fix a false positive for `RedundantActiveRecordAllMethod` when using `find` with block argument. ([@koic][])

lib/rubocop/cop/rails/redundant_active_record_all_method.rb

@@ -134,6 +134,7 @@ class RedundantActiveRecordAllMethod < Base
         def on_send(node)
           return unless followed_by_query_method?(node.parent)
           return if node.receiver.nil? && !inherit_active_record_base?(node)
+          return if use_find_method_with_block?(node)
 
           range_of_all_method = offense_range(node)
           add_offense(range_of_all_method) do |collector|
@@ -144,6 +145,13 @@ def on_send(node)
 
         private
 
+        def use_find_method_with_block?(node)
+          parent = node.parent
+          return false unless parent.method?(:find)
+
+          parent.parent&.block_type? || parent.parent&.numblock_type? || parent.first_argument&.block_pass_type?
+        end
+
         def offense_range(node)
           range_between(node.loc.selector.begin_pos, node.source_range.end_pos)
         end

spec/rubocop/cop/rails/redundant_active_record_all_method_spec.rb

@@ -387,5 +387,23 @@ class User < ::ActiveRecord::Base
         end
       RUBY
     end
+
+    it 'does not register an offense when using `find` with block' do
+      expect_no_offenses(<<~RUBY)
+        User.all.find { |item| item.do_something }
+      RUBY
+    end
+
+    it 'does not register an offense when using `find` with numbered block' do
+      expect_no_offenses(<<~RUBY)
+        User.all.find { _1.do_something }
+      RUBY
+    end
+
+    it 'does not register an offense when using `find` with symbol block' do
+      expect_no_offenses(<<~RUBY)
+        User.all.find(&:do_something)
+      RUBY
+    end
   end
 end