Removes unneeded preloading in Markdown rendering

Improves rendering and redaction performance of issue and merge
request references by not preloading associations that we do not
need

Changelog: performance
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/62273

lib/banzai/reference_parser/issue_parser.rb

@@ -66,14 +66,7 @@ module Banzai
               # These associations are primarily used for checking permissions.
               # Eager loading these ensures we don't end up running dozens of
               # queries in this process.
-              project: [
-                { namespace: :owner },
-                { group: [:owners, :group_members] },
-                :invited_groups,
-                :project_members,
-                :project_feature,
-                :route
-              ]
+              project: [:namespace, :project_feature, :route]
             }
           ),
           self.class.data_attribute

lib/banzai/reference_parser/merge_request_parser.rb

@@ -17,14 +17,7 @@ module Banzai
               # These associations are primarily used for checking permissions.
               # Eager loading these ensures we don't end up running dozens of
               # queries in this process.
-              target_project: [
-                { namespace: [:owner, :route] },
-                { group: [:owners, :group_members] },
-                :invited_groups,
-                :project_members,
-                :project_feature,
-                :route
-              ]
+              target_project: [{ namespace: :route }, :project_feature, :route]
             }),
           self.class.data_attribute
         )

spec/lib/banzai/reference_parser/issue_parser_spec.rb

@@ -5,9 +5,11 @@ require 'spec_helper'
 RSpec.describe Banzai::ReferenceParser::IssueParser do
   include ReferenceParserHelpers
 
-  let(:project) { create(:project, :public) }
-  let(:user)    { create(:user) }
-  let(:issue)   { create(:issue, project: project) }
+  let_it_be(:group)   { create(:group, :public) }
+  let_it_be(:project) { create(:project, :public, group: group) }
+  let_it_be(:user)    { create(:user) }
+  let_it_be(:issue)   { create(:issue, project: project) }
+
   let(:link)    { empty_html_link }
 
   subject       { described_class.new(Banzai::RenderContext.new(project, user)) }
@@ -121,7 +123,7 @@ RSpec.describe Banzai::ReferenceParser::IssueParser do
     end
   end
 
-  context 'when checking multiple merge requests on another project' do
+  context 'when checking multiple issues on another project' do
     let(:other_project) { create(:project, :public) }
     let(:other_issue) { create(:issue, project: other_project) }
 

spec/lib/banzai/reference_parser/merge_request_parser_spec.rb

@@ -5,9 +5,11 @@ require 'spec_helper'
 RSpec.describe Banzai::ReferenceParser::MergeRequestParser do
   include ReferenceParserHelpers
 
+  let(:group) { create(:group, :public) }
+  let(:project) { create(:project, :public, group: group) }
   let(:user) { create(:user) }
-  let(:project) { create(:project, :public) }
   let(:merge_request) { create(:merge_request, source_project: project) }
+
   subject(:parser) { described_class.new(Banzai::RenderContext.new(merge_request.target_project, user)) }
 
   let(:link) { empty_html_link }

spec/support/helpers/reference_parser_helpers.rb

@@ -21,6 +21,11 @@ module ReferenceParserHelpers
       end
 
       control = record_queries.call(control_links)
+
+      create(:group_member, group: project.group) if project.group
+      create(:project_member, project: project)
+      create(:project_group_link, project: project)
+
       actual = record_queries.call(actual_links)
 
       expect(actual.count).to be <= control.count