Modify namespace name and path validationdz-remove-namespaces-path-uniq

Currently namespace name and path have uniq validaiton which does not
allow us to use same group name/path inside different groups. This
commit changes validation in next way:

* Allow same namespace name with different parent_id
* Allow same namespace path. Uniq validation should be handled by routes table

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/db/migrate/20161206153754_add_name_index_to_namespace.rb b/db/migrate/20161206153754_add_name_index_to_namespace.rb
new file mode 100644
index 00000000000..aaa35ed6f0a
--- /dev/null
+++ b/db/migrate/20161206153754_add_name_index_to_namespace.rb
@@ -0,0 +1,20 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddNameIndexToNamespace < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  DOWNTIME = false
+
+  def up
+    add_concurrent_index(:namespaces, [:name, :parent_id], unique: true)
+  end
+
+  def down
+    if index_exists?(:namespaces, :name)
+      remove_index :namespaces, [:name, :parent_id]
+    end
+  end
+end