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Implement old-skool eagerloading for has_one :through

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Signed-off-by: Jeremy Kemper <jeremy@bitsweat.net>
This commit is contained in:
Frederick Cheung 2008-08-25 23:20:10 +01:00 committed by Jeremy Kemper
parent 172606e21f
commit 2dbda11945
2 changed files with 18 additions and 2 deletions
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4
activerecord/lib/active_record/associations.rb
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@ -1974,7 +1974,7 @@ def initialize(reflection, join_dependency, parent = nil)
@aliased_join_table_name = aliased_table_name_for(reflection.options[:join_table], "_join")
end
if reflection.macro == :has_many && reflection.options[:through]
if [:has_many, :has_one].include?(reflection.macro) && reflection.options[:through]
@aliased_join_table_name = aliased_table_name_for(reflection.through_reflection.klass.table_name, "_join")
end
end
@ -1998,7 +1998,7 @@ def association_join
]
when :has_many, :has_one
case
when reflection.macro == :has_many && reflection.options[:through]
when reflection.options[:through]
through_conditions = through_reflection.options[:conditions] ? "AND #{interpolate_sql(sanitize_sql(through_reflection.options[:conditions]))}" : ''
jt_foreign_key = jt_as_extra = jt_source_extra = jt_sti_extra = nil

16
activerecord/test/cases/associations/has_one_through_associations_test.rb
View File

@ -75,4 +75,20 @@ def test_eager_has_one_through_polymorphic_with_source_type
assert_not_nil assert_no_queries {clubs[0].sponsored_member}
end
def test_has_one_through_nonpreload_eagerloading
members = assert_queries(1) do
Member.find(:all, :include => :club, :conditions => ["members.name = ?", "Groucho Marx"], :order => 'clubs.name') #force fallback
end
assert_equal 1, members.size
assert_not_nil assert_no_queries {members[0].club}
end
def test_has_one_through_nonpreload_eager_loading_through_polymorphic
members = assert_queries(1) do
Member.find(:all, :include => :sponsor_club, :conditions => ["members.name = ?", "Groucho Marx"], :order => 'clubs.name') #force fallback
end
assert_equal 1, members.size
assert_not_nil assert_no_queries {members[0].sponsor_club}
end
end