From 3ae98181433dda1b5e19910e107494762512a86c Mon Sep 17 00:00:00 2001
From: Yves Senn <yves.senn@gmail.com>
Date: Mon, 5 Jan 2015 10:08:06 +0100
Subject: remove deprecation warning when modifying a Relation with cached
 arel.

This adresses https://github.com/rails/rails/commit/1b7aa62b184c4410c99208f71b59bbac5c5f03be#commitcomment-9147803
---
 .../lib/active_record/relation/query_methods.rb    | 35 +++++++++-------------
 1 file changed, 14 insertions(+), 21 deletions(-)

(limited to 'activerecord/lib')

diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index ef380abfe8..6892cc114c 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -62,15 +62,14 @@ module ActiveRecord
 
     Relation::MULTI_VALUE_METHODS.each do |name|
       class_eval <<-CODE, __FILE__, __LINE__ + 1
-        def #{name}_values                   # def select_values
-          @values[:#{name}] || []            #   @values[:select] || []
-        end                                  # end
-                                             #
-        def #{name}_values=(values)          # def select_values=(values)
-          raise ImmutableRelation if @loaded #   raise ImmutableRelation if @loaded
-          check_cached_relation
-          @values[:#{name}] = values         #   @values[:select] = values
-        end                                  # end
+        def #{name}_values                    # def select_values
+          @values[:#{name}] || []             #   @values[:select] || []
+        end                                   # end
+                                              #
+        def #{name}_values=(values)           # def select_values=(values)
+          assert_mutability!                  #   assert_mutability!
+          @values[:#{name}] = values          #   @values[:select] = values
+        end                                   # end
       CODE
     end
 
@@ -85,23 +84,12 @@ module ActiveRecord
     Relation::SINGLE_VALUE_METHODS.each do |name|
       class_eval <<-CODE, __FILE__, __LINE__ + 1
         def #{name}_value=(value)            # def readonly_value=(value)
-          raise ImmutableRelation if @loaded #   raise ImmutableRelation if @loaded
-          check_cached_relation
+          assert_mutability!                 #   assert_mutability!
           @values[:#{name}] = value          #   @values[:readonly] = value
         end                                  # end
       CODE
     end
 
-    def check_cached_relation # :nodoc:
-      if defined?(@arel) && @arel
-        @arel = nil
-        ActiveSupport::Deprecation.warn(<<-MSG.squish)
-          Modifying already cached Relation. The cache will be reset. Use a
-          cloned Relation to prevent this warning.
-        MSG
-      end
-    end
-
     def create_with_value # :nodoc:
       @values[:create_with] || {}
     end
@@ -857,6 +845,11 @@ module ActiveRecord
 
     private
 
+    def assert_mutability!
+      raise ImmutableRelation if @loaded
+      raise ImmutableRelation if defined?(@arel) && @arel
+    end
+
     def build_arel
       arel = Arel::SelectManager.new(table)
 
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