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Fix has_many assocation w/select load after create

If you create a new record via a collection association proxy that has
not loaded its target, and which selects additional attributes through
the association, then when the proxy loads its target, it will
inadvertently trigger a deprecation notice during attribute writing when
CollectionAssociation#merge_target_lists attempts to do its thing, since
the newly loaded records will possess attributes the created record does
not.
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commit 990a938cf7527b654cef06674f25f3632920bad7 1 parent eefb344
@ernie authored
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6 activerecord/CHANGELOG.md
@@ -1,5 +1,11 @@
## Rails 3.2.9 (unreleased)
+* Fix deprecation notice when loading a collection association that
+ selects columns from other tables, if a new record was previously
+ built using that association.
+
+ *Ernie Miller*
+
* The postgres adapter now supports tables with capital letters.
Fix #5920
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2  activerecord/lib/active_record/associations/collection_association.rb
@@ -409,7 +409,7 @@ def merge_target_lists(persisted, memory)
if mem_index
mem_record = memory.delete_at(mem_index)
- (record.attribute_names - mem_record.changes.keys).each do |name|
+ ((record.attribute_names & mem_record.attribute_names) - mem_record.changes.keys).each do |name|
mem_record[name] = record[name]
end
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8 activerecord/test/cases/associations/join_model_test.rb
@@ -236,6 +236,14 @@ def test_has_many_with_piggyback
assert_equal "2", categories(:sti_test).authors_with_select.first.post_id.to_s
end
+ def test_create_through_has_many_with_piggyback
+ category = categories(:sti_test)
+ ernie = category.authors_with_select.create(:name => 'Ernie')
+ assert_not_deprecated do
+ assert_equal ernie, category.authors_with_select.detect {|a| a.name == 'Ernie'}
+ end
+ end
+
def test_include_has_many_through
posts = Post.find(:all, :order => 'posts.id')
posts_with_authors = Post.find(:all, :include => :authors, :order => 'posts.id')
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