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-rw-r--r--activerecord/lib/active_record/core.rb2
-rw-r--r--activerecord/test/cases/base_test.rb4
2 files changed, 5 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/core.rb b/activerecord/lib/active_record/core.rb
index f936e865e4..d45ca9b24b 100644
--- a/activerecord/lib/active_record/core.rb
+++ b/activerecord/lib/active_record/core.rb
@@ -432,7 +432,7 @@ module ActiveRecord
# [ Person.find(1), Person.find(2), Person.find(3) ] & [ Person.find(1), Person.find(4) ] # => [ Person.find(1) ]
def hash
if id
- id.hash
+ [self.class, id].hash
else
super
end
diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb
index 3191393a41..80dcba1cf4 100644
--- a/activerecord/test/cases/base_test.rb
+++ b/activerecord/test/cases/base_test.rb
@@ -1504,6 +1504,10 @@ class BasicsTest < ActiveRecord::TestCase
assert_not_equal Post.new.hash, Post.new.hash
end
+ test "records of different classes have different hashes" do
+ assert_not_equal Post.new(id: 1).hash, Developer.new(id: 1).hash
+ end
+
test "resetting column information doesn't remove attribute methods" do
topic = topics(:first)