diff options
Diffstat (limited to 'activerecord/lib/active_record/associations/join_dependency.rb')
| -rw-r--r-- | activerecord/lib/active_record/associations/join_dependency.rb | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/activerecord/lib/active_record/associations/join_dependency.rb b/activerecord/lib/active_record/associations/join_dependency.rb index 81eb5136a1..0e4e951269 100644 --- a/activerecord/lib/active_record/associations/join_dependency.rb +++ b/activerecord/lib/active_record/associations/join_dependency.rb @@ -32,7 +32,7 @@ module ActiveRecord @alias_cache[node][column] end - class Table < Struct.new(:node, :columns) + class Table < Struct.new(:node, :columns) # :nodoc: def table Arel::Nodes::TableAlias.new node.table, node.aliased_table_name end @@ -103,9 +103,14 @@ module ActiveRecord join_root.drop(1).map!(&:reflection) end - def join_constraints(outer_joins) + def join_constraints(outer_joins, join_type) joins = join_root.children.flat_map { |child| - make_inner_joins join_root, child + + if join_type == Arel::Nodes::OuterJoin + make_left_outer_joins join_root, child + else + make_inner_joins join_root, child + end } joins.concat outer_joins.flat_map { |oj| @@ -131,9 +136,9 @@ module ActiveRecord def instantiate(result_set, aliases) primary_key = aliases.column_alias(join_root, join_root.primary_key) - seen = Hash.new { |h,parent_klass| - h[parent_klass] = Hash.new { |i,parent_id| - i[parent_id] = Hash.new { |j,child_klass| j[child_klass] = {} } + seen = Hash.new { |i, object_id| + i[object_id] = Hash.new { |j, child_class| + j[child_class] = {} } } @@ -150,7 +155,8 @@ module ActiveRecord message_bus.instrument('instantiation.active_record', payload) do result_set.each { |row_hash| - parent = parents[row_hash[primary_key]] ||= join_root.instantiate(row_hash, column_aliases) + parent_key = primary_key ? row_hash[primary_key] : row_hash + parent = parents[parent_key] ||= join_root.instantiate(row_hash, column_aliases) construct(parent, join_root, row_hash, result_set, seen, model_cache, aliases) } end @@ -175,6 +181,14 @@ module ActiveRecord [info] + child.children.flat_map { |c| make_outer_joins(child, c) } end + def make_left_outer_joins(parent, child) + tables = child.tables + join_type = Arel::Nodes::OuterJoin + info = make_constraints parent, child, tables, join_type + + [info] + child.children.flat_map { |c| make_left_outer_joins(child, c) } + end + def make_inner_joins(parent, child) tables = child.tables join_type = Arel::Nodes::InnerJoin @@ -233,7 +247,6 @@ module ActiveRecord def construct(ar_parent, parent, row, rs, seen, model_cache, aliases) return if ar_parent.nil? - primary_id = ar_parent.id parent.children.each do |node| if node.reflection.collection? @@ -253,14 +266,14 @@ module ActiveRecord next end - model = seen[parent.base_klass][primary_id][node.base_klass][id] + model = seen[ar_parent.object_id][node.base_klass][id] if model construct(model, node, row, rs, seen, model_cache, aliases) else model = construct_model(ar_parent, node, row, model_cache, id, aliases) model.readonly! - seen[parent.base_klass][primary_id][node.base_klass][id] = model + seen[ar_parent.object_id][node.base_klass][id] = model construct(model, node, row, rs, seen, model_cache, aliases) end end |