Fix trigger_request.variables

lib/api/v3/triggers.rb

@@ -32,15 +32,13 @@ module API
             render_api_error!(result[:message], result[:http_status])
           else
             pipeline = result[:pipeline]
-            trigger_request = pipeline.trigger_request
+            trigger_request = Ci::TriggerRequest.find_by(commit_id: pipeline.id)
 
             # We switched to Ci::PipelineVariable from Ci::TriggerRequest.variables.
             # Ci::TriggerRequest doesn't save variables anymore.
             # Here is copying Ci::PipelineVariable to Ci::TriggerRequest.variables for presenting the variables.
             # The same endpoint in v4 API pressents Pipeline instead of TriggerRequest, so it doesn't need such a process.
-            pipeline.variables.each do |variable|
-              trigger_request.variables << { key: variable.key, value: variable.value }
-            end
+            trigger_request.variables = params[:variables]
 
             present trigger_request, with: ::API::V3::Entities::TriggerRequest
           end

spec/models/ci/trigger_request_spec.rb

@@ -5,13 +5,13 @@ describe Ci::TriggerRequest do
     it 'be invalid if saving a variable' do
       trigger = build(:ci_trigger_request, variables: { TRIGGER_KEY_1: 'TRIGGER_VALUE_1' } )
 
-      expect(trigger.valid?).to be_falsey
+      expect(trigger).not_to be_valid
     end
 
     it 'be valid if not saving a variable' do
       trigger = build(:ci_trigger_request)
 
-      expect(trigger.valid?).to be_truthy
+      expect(trigger).to be_valid
     end
   end
 end

spec/requests/api/v3/triggers_spec.rb

@@ -80,7 +80,8 @@ describe API::V3::Triggers do
           post v3_api("/projects/#{project.id}/trigger/builds"), options.merge(variables: variables, ref: 'master')
           expect(response).to have_http_status(201)
           pipeline.builds.reload
-          expect(pipeline.builds.first.trigger_request.variables).to eq(variables)
+          expect(pipeline.variables.map { |v| { v.key => v.value } }.first).to eq(variables)
+          expect(json_response['variables']).to eq(variables)
         end
       end
     end