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-rw-r--r--activerecord/lib/active_record/relation/query_methods.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 4e4e58b319..63836bf375 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -305,6 +305,11 @@ module ActiveRecord
#
# User.joins(:posts)
# => SELECT "users".* FROM "users" INNER JOIN "posts" ON "posts"."user_id" = "users"."id"
+ #
+ # You can use strings in order to customize your joins:
+ #
+ # User.joins("LEFT JOIN bookmarks ON bookmarks.bookmarkable_type = 'Post' AND bookmarks.user_id = users.id")
+ # => SELECT "users".* FROM "users" LEFT JOIN bookmarks ON bookmarks.bookmarkable_type = 'Post' AND bookmarks.user_id = users.id
def joins(*args)
args.compact.blank? ? self : spawn.joins!(*args.flatten)
end