Strip whitespace for PipelineSchedule#cron

app/models/ci/pipeline_schedule.rb

@@ -5,6 +5,7 @@ module Ci
     extend Gitlab::Ci::Model
     include Importable
     include IgnorableColumn
+    include StripAttribute
 
     ignore_column :deleted_at
 
@@ -22,6 +23,8 @@ module Ci
 
     before_save :set_next_run_at
 
+    strip_attributes :cron
+
     scope :active, -> { where(active: true) }
     scope :inactive, -> { where(active: false) }
 

spec/models/ci/pipeline_schedule_spec.rb

@@ -35,6 +35,15 @@ describe Ci::PipelineSchedule do
         expect(pipeline_schedule).not_to be_valid
       end
     end
+
+    context 'when cron contains trailing whitespaces' do
+      it 'strips the attribute' do
+        pipeline_schedule = build(:ci_pipeline_schedule, cron: ' 0 0 * * *   ')
+
+        expect(pipeline_schedule).to be_valid
+        expect(pipeline_schedule.cron).to eq('0 0 * * *')
+      end
+    end
   end
 
   describe '#set_next_run_at' do