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-rw-r--r--lib/arel/tree_manager.rb3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/arel/tree_manager.rb b/lib/arel/tree_manager.rb
index e92092d6e1..9de86e2add 100644
--- a/lib/arel/tree_manager.rb
+++ b/lib/arel/tree_manager.rb
@@ -1,5 +1,8 @@
module Arel
class TreeManager
+ # FIXME: Remove this.
+ include Arel::Relation
+
def initialize engine
@engine = engine
@selects = []