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-rw-r--r--activerecord/CHANGELOG2
-rwxr-xr-xactiverecord/lib/active_record/associations.rb6
-rw-r--r--activerecord/test/associations/eager_test.rb5
-rw-r--r--activerecord/test/fixtures/author.rb2
4 files changed, 11 insertions, 4 deletions
diff --git a/activerecord/CHANGELOG b/activerecord/CHANGELOG
index fb90d76f44..450f3821e8 100644
--- a/activerecord/CHANGELOG
+++ b/activerecord/CHANGELOG
@@ -1,5 +1,7 @@
*SVN*
+* Eager belongs_to :include infers the foreign key from the association name rather than the class name. #10517 [Jonathan Viney]
+
* SQLite: fix rename_ and remove_column for columns with unique indexes. #10576 [Brandon Keepers]
* Ruby 1.9 compatibility. [Jeremy Kemper]
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index 434612fdc0..9c408779a0 100755
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -772,8 +772,8 @@ module ActiveRecord
# * <tt>:order</tt> - specify the order in which the associated objects are returned as an <tt>ORDER BY</tt> SQL fragment,
# such as <tt>last_name, first_name DESC</tt>
# * <tt>:foreign_key</tt> - specify the foreign key used for the association. By default this is guessed to be the name
- # of the associated class in lower-case and +_id+ suffixed. So a +Person+ class that makes a +belongs_to+ association to a
- # +Boss+ class will use +boss_id+ as the default +foreign_key+.
+ # of the association with an +_id+ suffix. So a class that defines a +belongs_to :person+ association will use +person_id+ as the default +foreign_key+.
+ # Similarly, +belongs_to :favorite_person, :class_name => "Person"+ will use a foreign key of +favorite_person_id+.
# * <tt>:counter_cache</tt> - caches the number of belonging objects on the associate class through the use of +increment_counter+
# and +decrement_counter+. The counter cache is incremented when an object of this class is created and decremented when it's
# destroyed. This requires that a column named <tt>#{table_name}_count</tt> (such as +comments_count+ for a belonging +Comment+ class)
@@ -1707,7 +1707,7 @@ module ActiveRecord
connection.quote_table_name(aliased_table_name),
reflection.klass.primary_key,
connection.quote_table_name(parent.aliased_table_name),
- options[:foreign_key] || klass.to_s.foreign_key
+ options[:foreign_key] || reflection.primary_key_name
]
else
""
diff --git a/activerecord/test/associations/eager_test.rb b/activerecord/test/associations/eager_test.rb
index 4fc2e62842..69b1584b63 100644
--- a/activerecord/test/associations/eager_test.rb
+++ b/activerecord/test/associations/eager_test.rb
@@ -115,6 +115,11 @@ class EagerAssociationTest < Test::Unit::TestCase
assert_equal [2], posts.collect { |p| p.id }
end
+ def test_eager_association_loading_with_belongs_to_inferred_foreign_key_from_association_name
+ author_favorite = AuthorFavorite.find(:first, :include => :favorite_author)
+ assert_equal authors(:mary), assert_no_queries { author_favorite.favorite_author }
+ end
+
def test_eager_association_loading_with_explicit_join
posts = Post.find(:all, :include => :comments, :joins => "INNER JOIN authors ON posts.author_id = authors.id AND authors.name = 'Mary'", :limit => 1, :order => 'author_id')
assert_equal 1, posts.length
diff --git a/activerecord/test/fixtures/author.rb b/activerecord/test/fixtures/author.rb
index 1503e17f87..538ed7ac7f 100644
--- a/activerecord/test/fixtures/author.rb
+++ b/activerecord/test/fixtures/author.rb
@@ -105,5 +105,5 @@ end
class AuthorFavorite < ActiveRecord::Base
belongs_to :author
- belongs_to :favorite_author, :class_name => "Author", :foreign_key => 'favorite_author_id'
+ belongs_to :favorite_author, :class_name => "Author"
end