Accept variable params in create_params

app/controllers/projects/pipelines_controller.rb

@@ -157,7 +157,7 @@ class Projects::PipelinesController < Projects::ApplicationController
   end
   def create_params
-    params.require(:pipeline).permit(:ref)
+    params.require(:pipeline).permit(:ref, variables_attributes: %i[key secret_value])
   end
   def pipeline