1 files changed, 66 insertions, 0 deletions
diff --git a/db/migrate/20180413022611_create_missing_namespace_for_internal_users.rb b/db/migrate/20180413022611_create_missing_namespace_for_internal_users.rb
new file mode 100644
index 00000000000..8fc558be733
--- /dev/null
+++ b/db/migrate/20180413022611_create_missing_namespace_for_internal_users.rb
@@ -0,0 +1,66 @@
+class CreateMissingNamespaceForInternalUsers < ActiveRecord::Migration
+  DOWNTIME = false
+
+  def up
+    connection.exec_query(users_query.to_sql).rows.each do |id, username|
+      create_namespace(id, username)
+      # When testing locally I've noticed that these internal users are missing
+      # the notification email, for more details visit the below link:
+      # https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/18357#note_68327560
+      set_notification_email(id)
+    end
+  end
+
+  def down
+    # no-op
+  end
+
+  private
+
+  def users
+    @users ||= Arel::Table.new(:users)
+  end
+
+  def namespaces
+    @namespaces ||= Arel::Table.new(:namespaces)
+  end
+
+  def users_query
+    condition = users[:ghost].eq(true)
+
+    if column_exists?(:users, :support_bot)
+      condition = condition.or(users[:support_bot].eq(true))
+    end
+
+    users.join(namespaces, Arel::Nodes::OuterJoin)
+      .on(namespaces[:type].eq(nil).and(namespaces[:owner_id].eq(users[:id])))
+      .where(namespaces[:owner_id].eq(nil))
+      .where(condition)
+      .project(users[:id], users[:username])
+  end
+
+  def create_namespace(user_id, username)
+    path = Uniquify.new.string(username) do |str|
+      query = "SELECT id FROM namespaces WHERE parent_id IS NULL AND path='#{str}' LIMIT 1"
+      connection.exec_query(query).present?
+    end
+
+    insert_query = "INSERT INTO namespaces(owner_id, path, name) VALUES(#{user_id}, '#{path}', '#{path}')"
+    namespace_id = connection.insert_sql(insert_query)
+
+    create_route(namespace_id)
+  end
+
+  def create_route(namespace_id)
+    return unless namespace_id
+
+    row = connection.exec_query("SELECT id, path FROM namespaces WHERE id=#{namespace_id}").first
+    id, path = row.values_at('id', 'path')
+
+    execute("INSERT INTO routes(source_id, source_type, path, name) VALUES(#{id}, 'Namespace', '#{path}', '#{path}')")
+  end
+
+  def set_notification_email(user_id)
+    execute "UPDATE users SET notification_email = email WHERE notification_email IS NULL AND id = #{user_id}"
+  end
+end