Add Import/Export Setting for trigger_schedule. Remove ref validation.

app/models/ci/trigger_schedule.rb

 module Ci
   class TriggerSchedule < ActiveRecord::Base
     extend Ci::Model
+    include Importable
 
     acts_as_paranoid
 
@@ -9,10 +10,10 @@ module Ci
 
     delegate :ref, to: :trigger
 
-    validates :trigger, presence: true
-    validates :cron, cron: true, presence: true
-    validates :cron_time_zone, presence: true
-    validates :ref, ref: true, presence: true
+    validates :trigger, presence: { unless: :importing? }
+    validates :cron, cron: true, presence: { unless: :importing? }
+    validates :cron_time_zone, presence: { unless: :importing? }
+    validates :ref, presence: { unless: :importing? }
     # validate :check_cron_frequency
 
     after_create :schedule_next_run!

app/validators/ref_validator.rb

-# RefValidator
-#
-# Custom validator for Ref.
-class RefValidator < ActiveModel::EachValidator
-  def validate_each(record, attribute, value)
-    unless record.project.repository.branch_exists?(value)
-      record.errors.add(attribute, " does not exist")
-    end
-  end
-end

lib/gitlab/import_export/import_export.yml

@@ -39,7 +39,8 @@ project_tree:
       - :author
       - :events
     - :statuses
-  - :triggers # TODO: Need to confirm
+  - triggers:
+    - :trigger_schedule
   - :deploy_keys
   - :services
   - :hooks

lib/gitlab/import_export/relation_factory.rb

@@ -5,6 +5,7 @@ module Gitlab
                     pipelines: 'Ci::Pipeline',
                     statuses: 'commit_status',
                     triggers: 'Ci::Trigger',
+                    trigger_schedule: 'Ci::TriggerSchedule',
                     builds: 'Ci::Build',
                     hooks: 'ProjectHook',
                     merge_access_levels: 'ProtectedBranch::MergeAccessLevel',

spec/lib/gitlab/import_export/all_models.yml

@@ -100,6 +100,8 @@ triggers:
 - trigger_requests
 - owner
 - trigger_schedule
+trigger_schedule:
+- trigger
 deploy_keys:
 - user
 - deploy_keys_projects

spec/lib/gitlab/import_export/safe_model_attributes.yml

@@ -249,6 +249,7 @@ Ci::TriggerSchedule:
 - created_at
 - updated_at
 - cron
+- cron_time_zone
 - next_run_at
 DeployKey:
 - id

spec/models/ci/trigger_schedule_spec.rb

@@ -5,13 +5,6 @@ describe Ci::TriggerSchedule, models: true do
   it { is_expected.to belong_to(:trigger) }
   it { is_expected.to respond_to :ref }
 
-  it 'should validate ref existence' do
-    trigger_schedule = create(:ci_trigger_schedule, :cron_nightly_build)
-    trigger_schedule.trigger.ref = 'invalid-ref'
-    trigger_schedule.valid?
-    expect(trigger_schedule.errors[:ref].first).to include('does not exist')
-  end
-
   describe '#schedule_next_run!' do
     let(:trigger_schedule) { create(:ci_trigger_schedule, :cron_nightly_build, next_run_at: nil) }