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Add counter cache test for class_name

Backport test from #14410
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commit e64875ffde5787eee24a96070f3cf51727347304 1 parent 34e54fa
@arthurnn arthurnn authored
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11 activerecord/test/cases/associations/belongs_to_associations_test.rb
@@ -824,6 +824,17 @@ def test_self_referential_belongs_to_with_counter_cache_assigning_nil
assert_equal 0, comments(:greetings).reload.children_count
end
+ def test_belongs_to_with_id_assigning
+ post = posts(:welcome)
+ comment = Comment.create! body: "foo", post: post
+ parent = comments(:greetings)
+ assert_equal 0, parent.reload.children_count
+ comment.parent_id = parent.id
+
+ comment.save!
+ assert_equal 1, parent.reload.children_count
+ end
+
def test_polymorphic_with_custom_primary_key
toy = Toy.create!
sponsor = Sponsor.create!(:sponsorable => toy)
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