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-rw-r--r--activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
index a30945d0ee..09ac083069 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
@@ -665,9 +665,11 @@ module ActiveRecord
# [<tt>:index</tt>]
# Add an appropriate index. Defaults to false.
# [<tt>:foreign_key</tt>]
- # Add an appropriate foreign key. Defaults to false.
+ # Add an appropriate foreign key constraint. Defaults to false.
# [<tt>:polymorphic</tt>]
# Whether an additional +_type+ column should be added. Defaults to false.
+ # [<tt>:null</tt>]
+ # Whether the column allows nulls. Defaults to true.
#
# ====== Create a user_id integer column
#