Update API responses to include "section" of ApprovalMergeRequestRule

ee/app/models/approval_project_rule.rb

@@ -37,6 +37,10 @@ class ApprovalProjectRule < ApplicationRecord
     nil
   end
 
+  def section
+    nil
+  end
+
   def apply_report_approver_rules_to(merge_request)
     report_type = report_type_for(self)
     rule = merge_request

ee/app/models/approval_wrapped_rule.rb

@@ -11,7 +11,7 @@ class ApprovalWrappedRule
   def_delegators(:@approval_rule,
                  :regular?, :any_approver?, :code_owner?, :report_approver?,
                  :overridden?, :id, :name, :users, :groups, :code_owner,
-                 :source_rule, :rule_type, :approvals_required)
+                 :source_rule, :rule_type, :approvals_required, :section)
 
   def self.wrap(merge_request, rule)
     if rule.any_approver?

ee/lib/ee/api/entities/merge_request_approval_rule.rb

@@ -8,6 +8,7 @@ module EE
           expose :approvals_required
         end
 
+        expose :section
         expose :source_rule, using: MergeRequestApprovalRule::SourceRule
         expose :overridden?, as: :overridden
       end

ee/spec/fixtures/api/schemas/public_api/v4/merge_request_approval_rule.json

@@ -6,6 +6,7 @@
     "approvals_required": { "type": "integer" },
     "contains_hidden_groups": { "type": "boolean" },
     "rule_type": { "type": "string" },
+    "section": { "type": ["null", "string"] },
     "source_rule": {
       "type":["null", "object"],
       "properties": {}

ee/spec/requests/api/merge_request_approval_rules_spec.rb

@@ -98,6 +98,7 @@ describe API::MergeRequestApprovalRules do
         expect(rules.first['name']).to eq(mr_approval_rule.name)
         expect(rules.first['approvals_required']).to eq(mr_approval_rule.approvals_required)
         expect(rules.first['rule_type']).to eq(mr_approval_rule.rule_type)
+        expect(rules.first['section']).to be_nil
         expect(rules.first['contains_hidden_groups']).to eq(false)
         expect(rules.first['source_rule']).to be_nil
         expect(rules.first['eligible_approvers']).to match([hash_including('id' => approver.id)])

ee/spec/requests/api/merge_request_approvals_spec.rb

@@ -174,7 +174,28 @@ describe API::MergeRequestApprovals do
       expect(rule_response['name']).to eq('foo')
       expect(rule_response['approvers'][0]['username']).to eq(approver.username)
       expect(rule_response['approved_by'][0]['username']).to eq(approver.username)
-      expect(rule_response['source_rule']).to eq(nil)
+      expect(rule_response['source_rule']).to be_nil
+      expect(rule_response['section']).to be_nil
+    end
+
+    context "when rule has a section" do
+      let(:rule) do
+        create(
+          :code_owner_rule,
+          merge_request: merge_request,
+          approvals_required: 2,
+          name: "foo",
+          section: "Example Section"
+        )
+      end
+
+      it "exposes the value of section when set" do
+        get api(url, user)
+
+        rule_response = json_response["rules"].first
+
+        expect(rule_response["section"]).to eq(rule.section)
+      end
     end
 
     context 'when target_branch is specified' do