Remove useless .becomes(Namespace) calls

After https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/12566
most route helpers methods do not need to take project.namespace as a
parameter and should be enogh to pass only project.

Removing the need to pass project.namespace helps to reduce some cases
where N+1 is generated due to project.namespace.becomes(Namespace)
creating a new instance of the namepsace thus not making use of
eager loaded associations

app/controllers/projects/environments_controller.rb

@@ -105,7 +105,7 @@ class Projects::EnvironmentsController < Projects::ApplicationController
 
     action_or_env_url =
       if stop_action
-        polymorphic_url([project.namespace.becomes(Namespace), project, stop_action])
+        polymorphic_url([project, stop_action])
       else
         project_environment_url(project, @environment)
       end

app/helpers/award_emoji_helper.rb

@@ -12,7 +12,7 @@ module AwardEmojiHelper
         toggle_award_emoji_project_note_path(@project, awardable.id)
       end
     else
-      url_for([:toggle_award_emoji, @project.namespace.becomes(Namespace), @project, awardable])
+      url_for([:toggle_award_emoji, @project, awardable])
     end
   end
 end

app/helpers/custom_metrics_helper.rb

@@ -2,10 +2,8 @@
 
 module CustomMetricsHelper
   def custom_metrics_data(project, metric)
-    custom_metrics_path = project.namespace.becomes(::Namespace)
-
     {
-      'custom-metrics-path' => url_for([custom_metrics_path, project, metric]),
+      'custom-metrics-path' => url_for([project, metric]),
       'metric-persisted' => metric.persisted?.to_s,
       'edit-project-service-path' => edit_project_service_path(project, PrometheusService),
       'validate-query-path' => validate_query_project_prometheus_metrics_path(project),

app/helpers/environment_helper.rb

@@ -19,7 +19,7 @@ module EnvironmentHelper
   end
 
   def deployment_path(deployment)
-    [deployment.project.namespace.becomes(Namespace), deployment.project, deployment.deployable]
+    [deployment.project, deployment.deployable]
   end
 
   def deployment_link(deployment, text: nil)

app/helpers/events_helper.rb

@@ -199,8 +199,7 @@ module EventsHelper
     elsif event.design_note?
       design_url(event.note_target, anchor: dom_id(event.note))
     else
-      polymorphic_url([event.project.namespace.becomes(Namespace),
-                       event.project, event.note_target],
+      polymorphic_url([event.project, event.note_target],
                         anchor: dom_id(event.target))
     end
   end

app/helpers/gitlab_routing_helper.rb

@@ -100,8 +100,12 @@ module GitlabRoutingHelper
     toggle_award_emoji_snippet_path(*args)
   end
 
-  def toggle_award_emoji_namespace_project_project_snippet_path(*args)
-    toggle_award_emoji_namespace_project_snippet_path(*args)
+  def toggle_award_emoji_project_project_snippet_path(*args)
+    toggle_award_emoji_project_snippet_path(*args)
+  end
+
+  def toggle_award_emoji_project_project_snippet_url(*args)
+    toggle_award_emoji_project_snippet_url(*args)
   end
 
   ## Members

app/helpers/notes_helper.rb

@@ -126,7 +126,7 @@ module NotesHelper
     if @snippet.is_a?(PersonalSnippet)
       [@note]
     else
-      [@project.namespace.becomes(Namespace), @project, @note]
+      [@project, @note]
     end
   end
 

app/helpers/timeboxes_helper.rb

@@ -40,7 +40,7 @@ module TimeboxesHelper
     opts = { milestone_title: milestone.title, state: state }
 
     if @project
-      polymorphic_path([@project.namespace.becomes(Namespace), @project, type], opts)
+      polymorphic_path([@project, type], opts)
     elsif @group
       polymorphic_url([type, @group], opts)
     else

app/models/project_services/jira_service.rb

@@ -375,7 +375,6 @@ class JiraService < IssueTrackerService
   def build_entity_url(noteable_type, entity_id)
     polymorphic_url(
       [
-        self.project.namespace.becomes(Namespace),
         self.project,
         noteable_type.to_sym
       ],

app/presenters/event_presenter.rb

@@ -24,7 +24,7 @@ class EventPresenter < Gitlab::View::Presenter::Delegated
     when Group
       [event.group, event.target]
     when Project
-      [event.project.namespace.becomes(Namespace), event.project, event.target]
+      [event.project, event.target]
     else
       ''
     end

app/views/admin/groups/show.html.haml

@@ -74,7 +74,7 @@
         - @projects.each do |project|
           %li
             %strong
-              = link_to project.full_name, [:admin, project.namespace.becomes(Namespace), project]
+              = link_to project.full_name, [:admin, project]
               %span.badge.badge-pill
                 = storage_counter(project.statistics.storage_size)
             %span.float-right.light
@@ -93,7 +93,7 @@
           - shared_projects.each do |project|
             %li
               %strong
-                = link_to project.full_name, [:admin, project.namespace.becomes(Namespace), project]
+                = link_to project.full_name, [:admin, project]
                 %span.badge.badge-pill
                   = storage_counter(project.statistics.storage_size)
               %span.float-right.light

app/views/import/google_code/status.html.haml

@@ -37,7 +37,7 @@
           %td
             = link_to project.import_source, "https://code.google.com/p/#{project.import_source}", target: "_blank", rel: 'noopener noreferrer'
           %td
-            = link_to project.full_path, [project.namespace.becomes(Namespace), project]
+            = link_to project.full_path, project
           %td.job-status
             - case project.import_status
             - when 'finished'

app/views/notify/_relabeled_issuable_email.text.erb

 <%= 'Label'.pluralize(@label_names.size) %> added: <%= @label_names.to_sentence %>
 
-<%= url_for([issuable.project.namespace.becomes(Namespace), issuable.project, issuable, { only_path: false }]) %>
+<%= url_for([issuable.project, issuable, { only_path: false }]) %>

app/views/notify/reassigned_issue_email.text.erb

 Reassigned Issue <%= @issue.iid %>
 
-<%= url_for([@issue.project.namespace.becomes(Namespace), @issue.project, @issue, { only_path: false }]) %>
+<%= url_for([@issue.project, @issue, { only_path: false }]) %>
 
 Assignee changed <%= "from #{sanitize_name(@previous_assignees.map(&:name).to_sentence)}" if @previous_assignees.any? -%>
  to <%= "#{@issue.assignees.any? ? @issue.assignee_list : 'Unassigned'}" %>

app/views/notify/reassigned_merge_request_email.text.erb

 Reassigned Merge Request <%= @merge_request.iid %>
 
-<%= url_for([@merge_request.project.namespace.becomes(Namespace), @merge_request.project, @merge_request, { only_path: false }]) %>
+<%= url_for([@merge_request.project, @merge_request, { only_path: false }]) %>
 
 Assignee changed <%= "from #{sanitize_name(@previous_assignees.map(&:name).to_sentence)}" if @previous_assignees.any? -%>
  to <%= "#{@merge_request.assignees.any? ? @merge_request.assignee_list : 'Unassigned'}" %>

app/views/projects/commit/_change.html.haml

@@ -21,7 +21,7 @@
       .modal-body
         - if description
           %p= description
-        = form_tag [type.underscore, @project.namespace.becomes(Namespace), @project, commit], method: :post, remote: false, class: "js-#{type}-form js-requires-input" do
+        = form_tag [type.underscore, @project, commit], method: :post, remote: false, class: "js-#{type}-form js-requires-input" do
           .form-group.branch
             = label_tag 'start_branch', branch_label, class: 'label-bold'
 

app/views/projects/default_branch/_show.html.haml

@@ -9,7 +9,7 @@
       = _('Select the branch you want to set as the default for this project. All merge requests and commits will automatically be made against this branch unless you specify a different one.')
 
   .settings-content
-    = form_for [@project.namespace.becomes(Namespace), @project], remote: true, html: { multipart: true, anchor: 'default-branch-settings' }, authenticity_token: true do |f|
+    = form_for @project, remote: true, html: { multipart: true, anchor: 'default-branch-settings' }, authenticity_token: true do |f|
       %fieldset
         - if @project.empty_repo?
           .text-secondary

app/views/projects/deploy_keys/edit.html.haml

@@ -3,7 +3,7 @@
 %hr
 
 %div
-  = form_for [@project.namespace.becomes(Namespace), @project, @deploy_key], include_id: false, html: { class: 'js-requires-input' } do |f|
+  = form_for [@project, @deploy_key], include_id: false, html: { class: 'js-requires-input' } do |f|
     = render partial: 'shared/deploy_keys/form', locals: { form: f, deploy_key: @deploy_key }
     .form-actions
       = f.submit 'Save changes', class: 'btn-success btn'

app/views/projects/deployments/_actions.haml

@@ -10,5 +10,5 @@
           - actions.each do |action|
             - next unless can?(current_user, :update_build, action)
             %li
-              = link_to [:play, @project.namespace.becomes(Namespace), @project, action], method: :post, rel: 'nofollow' do
+              = link_to [:play, @project, action], method: :post, rel: 'nofollow' do
                 %span= action.name

app/views/projects/deployments/_confirm_rollback_modal.html.haml

@@ -16,7 +16,7 @@
             = s_('Environments|This action will run the job defined by %{environment_name} for commit %{commit_id}, putting the environment in a previous version. You can revert it by re-deploying the latest version of your application. Are you sure you want to continue?').html_safe % {commit_id: commit_sha, environment_name: @environment.name}
       .modal-footer
         = button_tag _('Cancel'), type: 'button', class: 'btn btn-cancel', data: { dismiss: 'modal' }
-        = link_to [:retry, @project.namespace.becomes(Namespace), @project, deployment.deployable], method: :post, class: 'btn btn-danger' do
+        = link_to [:retry, @project, deployment.deployable], method: :post, class: 'btn btn-danger' do
           - if deployment.last?
             = s_('Environments|Re-deploy')
           - else

app/views/projects/edit.html.haml

@@ -17,7 +17,7 @@
     %p= _('Choose visibility level, enable/disable project features (issues, repository, wiki, snippets) and set permissions.')
 
   .settings-content
-    = form_for [@project.namespace.becomes(Namespace), @project], remote: true, html: { multipart: true, class: "sharing-permissions-form" }, authenticity_token: true do |f|
+    = form_for @project, remote: true, html: { multipart: true, class: "sharing-permissions-form" }, authenticity_token: true do |f|
       %input{ name: 'update_section', type: 'hidden', value: 'js-shared-permissions' }
       %template.js-project-permissions-form-data{ type: "application/json" }= project_permissions_panel_data_json(@project)
       .js-project-permissions-form
@@ -34,7 +34,7 @@
   .settings-content
     = render_if_exists 'shared/promotions/promote_mr_features'
 
-    = form_for [@project.namespace.becomes(Namespace), @project], remote: true, html: { multipart: true, class: "merge-request-settings-form js-mr-settings-form" }, authenticity_token: true do |f|
+    = form_for @project, remote: true, html: { multipart: true, class: "merge-request-settings-form js-mr-settings-form" }, authenticity_token: true do |f|
       %input{ name: 'update_section', type: 'hidden', value: 'js-merge-request-settings' }
       = render 'projects/merge_request_settings', form: f
       = f.submit _('Save changes'), class: "btn btn-success qa-save-merge-request-changes rspec-save-merge-request-changes"
@@ -77,7 +77,7 @@
     .sub-section.rename-repository
       %h4.warning-title= _('Change path')
       = render 'projects/errors'
-      = form_for([@project.namespace.becomes(Namespace), @project]) do |f|
+      = form_for @project do |f|
         .form-group
           = f.label :path, _('Path'), class: 'label-bold'
           .form-group
@@ -96,7 +96,7 @@
     - if can?(current_user, :change_namespace, @project)
       .sub-section
         %h4.danger-title= _('Transfer project')
-        = form_for([@project.namespace.becomes(Namespace), @project], url: transfer_project_path(@project), method: :put, remote: true, html: { class: 'js-project-transfer-form' } ) do |f|
+        = form_for @project, url: transfer_project_path(@project), method: :put, remote: true, html: { class: 'js-project-transfer-form' } do |f|
           .form-group
             = label_tag :new_namespace_id, nil, class: 'label-bold' do
               %span= _('Select a new namespace')
@@ -114,7 +114,7 @@
         %h4.danger-title= _('Remove fork relationship')
         %p= remove_fork_project_description_message(@project)
 
-        = form_for([@project.namespace.becomes(Namespace), @project], url: remove_fork_project_path(@project), method: :delete, remote: true, html: { class: 'transfer-project' }) do |f|
+        = form_for @project, url: remove_fork_project_path(@project), method: :delete, remote: true, html: { class: 'transfer-project' } do |f|
           %p
             %strong= _('Once removed, the fork relationship cannot be restored and you will no longer be able to send merge requests to the source.')
           = button_to _('Remove fork relationship'), '#', class: "btn btn-remove js-confirm-danger", data: { "confirm-danger-message" => remove_fork_project_warning_message(@project) }

app/views/projects/environments/_form.html.haml

@@ -6,7 +6,7 @@
       - link_to_read_more = link_to(_("More information"), help_page_path("ci/environments/index.md"))
       = _("Environments allow you to track deployments of your application %{link_to_read_more}.").html_safe % { link_to_read_more: link_to_read_more }
 
-  = form_for [@project.namespace.becomes(Namespace), @project, @environment], html: { class: 'col-lg-9' } do |f|
+  = form_for [@project, @environment], html: { class: 'col-lg-9' } do |f|
     = form_errors(@environment)
 
     .form-group

app/views/projects/hooks/edit.html.haml

@@ -7,7 +7,7 @@
     = render 'shared/web_hooks/title_and_docs', hook: @hook
 
   .col-lg-9.gl-mb-3
-    = form_for [@project.namespace.becomes(Namespace), @project, @hook], as: :hook, url: project_hook_path(@project, @hook) do |f|
+    = form_for [@project, @hook], as: :hook, url: project_hook_path(@project, @hook) do |f|
       = render partial: 'shared/web_hooks/form', locals: { form: f, hook: @hook }
 
       %span>= f.submit 'Save changes', class: 'btn btn-success gl-mr-3'

app/views/projects/hooks/index.html.haml

@@ -7,7 +7,7 @@
     = render 'shared/web_hooks/title_and_docs', hook: @hook
 
   .col-lg-8.gl-mb-3
-    = form_for @hook, as: :hook, url: polymorphic_path([@project.namespace.becomes(Namespace), @project, :hooks]) do |f|
+    = form_for @hook, as: :hook, url: polymorphic_path([@project, :hooks]) do |f|
       = render partial: 'shared/web_hooks/form', locals: { form: f, hook: @hook }
       = f.submit 'Add webhook', class: 'btn btn-success'
 

app/views/projects/issues/_form.html.haml

-= form_for [@project.namespace.becomes(Namespace), @project, @issue],
+= form_for [@project, @issue],
            html: { class: 'issue-form common-note-form js-quick-submit js-requires-input' } do |f|
   = render 'shared/issuable/form', f: f, issuable: @issue

app/views/projects/issues/verify.html.haml

-- form = [@project.namespace.becomes(Namespace), @project, @issue]
-
-= render layout: 'layouts/recaptcha_verification', locals: { spammable: @issue, form: form } do
+= render layout: 'layouts/recaptcha_verification', locals: { spammable: @issue } do
   = hidden_field_tag(:merge_request_to_resolve_discussions_of, params[:merge_request_to_resolve_discussions_of])
   = hidden_field_tag(:discussion_to_resolve, params[:discussion_to_resolve])

app/views/projects/merge_requests/_form.html.haml

-= form_for [@project.namespace.becomes(Namespace), @project, @merge_request],
+= form_for [@project, @merge_request],
            html: { class: 'merge-request-form common-note-form js-requires-input js-quick-submit' } do |f|
   = render 'shared/issuable/form', f: f, issuable: @merge_request, presenter: @mr_presenter

app/views/projects/merge_requests/creations/_new_compare.html.haml

 %h3.page-title
   New Merge Request
 
-= form_for [@project.namespace.becomes(Namespace), @project, @merge_request], url: project_new_merge_request_path(@project), method: :get, html: { class: "merge-request-form js-requires-input" } do |f|
+= form_for [@project, @merge_request], url: project_new_merge_request_path(@project), method: :get, html: { class: "merge-request-form js-requires-input" } do |f|
   - if params[:nav_source].present?
     = hidden_field_tag(:nav_source, params[:nav_source])
   .hide.alert.alert-danger.mr-compare-errors

app/views/projects/merge_requests/creations/_new_submit.html.haml

 %h3.page-title
   New Merge Request
-= form_for [@project.namespace.becomes(Namespace), @project, @merge_request], html: { class: 'merge-request-form common-note-form js-requires-input js-quick-submit' } do |f|
+= form_for [@project, @merge_request], html: { class: 'merge-request-form common-note-form js-requires-input js-quick-submit' } do |f|
   = render 'shared/issuable/form', f: f, issuable: @merge_request, commits: @commits, presenter: @mr_presenter
   = f.hidden_field :source_project_id
   = f.hidden_field :source_branch

app/views/projects/milestones/_form.html.haml

-= form_for [@project.namespace.becomes(Namespace), @project, @milestone],
+= form_for [@project, @milestone],
            html: { class: 'milestone-form common-note-form js-quick-submit js-requires-input' } do |f|
   = form_errors(@milestone)
   .row

app/views/projects/pages/_pages_settings.html.haml

-= form_for @project, url: namespace_project_pages_path(@project.namespace.becomes(Namespace), @project), html: { class: 'inline', title: pages_https_only_title } do |f|
+= form_for @project, url: project_pages_path(@project), html: { class: 'inline', title: pages_https_only_title } do |f|
   - if Gitlab.config.pages.external_http || Gitlab.config.pages.external_https
     = render_if_exists 'shared/pages/max_pages_size_input', form: f
 

app/views/projects/pages_domains/new.html.haml

@@ -4,7 +4,7 @@
   = _("New Pages Domain")
 = render 'projects/pages_domains/helper_text'
 %div
-  = form_for [@project.namespace.becomes(Namespace), @project, domain_presenter], html: { class: 'fieldset-form' } do |f|
+  = form_for [@project, domain_presenter], html: { class: 'fieldset-form' } do |f|
     = render 'form', { f: f }
     .form-actions
       = f.submit _('Create New Domain'), class: "btn btn-success"

app/views/projects/pages_domains/show.html.haml

@@ -14,7 +14,7 @@
   = _('Pages Domain')
 = render 'projects/pages_domains/helper_text'
 %div
-  = form_for [@project.namespace.becomes(Namespace), @project, domain_presenter], html: { class: 'fieldset-form' } do |f|
+  = form_for [@project, domain_presenter], html: { class: 'fieldset-form' } do |f|
     = render 'form', { f: f }
     .form-actions.d-flex.justify-content-between
       = f.submit _('Save Changes'), class: "btn btn-success"

app/views/projects/pipeline_schedules/_form.html.haml

-= form_for [@project.namespace.becomes(Namespace), @project, @schedule], as: :schedule, html: { id: "new-pipeline-schedule-form", class: "js-pipeline-schedule-form pipeline-schedule-form" } do |f|
+= form_for [@project, @schedule], as: :schedule, html: { id: "new-pipeline-schedule-form", class: "js-pipeline-schedule-form pipeline-schedule-form" } do |f|
   = form_errors(@schedule)
   .form-group.row
     .col-md-9

app/views/projects/protected_branches/shared/_create_protected_branch.html.haml

-= form_for [@project.namespace.becomes(Namespace), @project, @protected_branch], html: { class: 'new-protected-branch js-new-protected-branch' } do |f|
+= form_for [@project, @protected_branch], html: { class: 'new-protected-branch js-new-protected-branch' } do |f|
   %input{ type: 'hidden', name: 'update_section', value: 'js-protected-branches-settings' }
   .card
     .card-header

app/views/projects/protected_branches/shared/_protected_branch.html.haml

@@ -20,4 +20,4 @@
 
   - if can_admin_project
     %td
-      = link_to 'Unprotect', [@project.namespace.becomes(Namespace), @project, protected_branch, { update_section: 'js-protected-branches-settings' }], disabled: local_assigns[:disabled], data: { confirm: 'Branch will be writable for developers. Are you sure?' }, method: :delete, class: "btn btn-warning"
+      = link_to 'Unprotect', [@project, protected_branch, { update_section: 'js-protected-branches-settings' }], disabled: local_assigns[:disabled], data: { confirm: 'Branch will be writable for developers. Are you sure?' }, method: :delete, class: "btn btn-warning"

app/views/projects/protected_tags/shared/_create_protected_tag.html.haml

-= form_for [@project.namespace.becomes(Namespace), @project, @protected_tag], html: { class: 'new-protected-tag js-new-protected-tag' } do |f|
+= form_for [@project, @protected_tag], html: { class: 'new-protected-tag js-new-protected-tag' } do |f|
   %input{ type: 'hidden', name: 'update_section', value: 'js-protected-tags-settings' }
   .card
     .card-header

app/views/projects/protected_tags/shared/_protected_tag.html.haml

@@ -19,4 +19,4 @@
 
   - if can? current_user, :admin_project, @project
     %td
-      = link_to 'Unprotect', [@project.namespace.becomes(Namespace), @project, protected_tag, { update_section: 'js-protected-tags-settings' }], data: { confirm: 'Tag will be writable for developers. Are you sure?' }, method: :delete, class: 'btn btn-warning'
+      = link_to 'Unprotect', [@project, protected_tag, { update_section: 'js-protected-tags-settings' }], data: { confirm: 'Tag will be writable for developers. Are you sure?' }, method: :delete, class: 'btn btn-warning'

app/views/projects/runners/_runner.html.haml

@@ -27,7 +27,7 @@
           - runner_project = @project.runner_projects.find_by(runner_id: runner) # rubocop: disable CodeReuse/ActiveRecord
           = link_to _('Disable for this project'), project_runner_project_path(@project, runner_project), data: { confirm: _("Are you sure?") }, method: :delete, class: 'btn btn-danger btn-sm'
       - elsif runner.project_type?
-        = form_for [@project.namespace.becomes(Namespace), @project, @project.runner_projects.new] do |f|
+        = form_for [@project, @project.runner_projects.new] do |f|
           = f.hidden_field :runner_id, value: runner.id
           = f.submit _('Enable for this project'), class: 'btn btn-sm'
   .float-right

app/views/projects/settings/_general.html.haml

-= form_for [@project.namespace.becomes(Namespace), @project], remote: true, html: { multipart: true, class: "edit-project js-general-settings-form" }, authenticity_token: true do |f|
+= form_for [@project], remote: true, html: { multipart: true, class: "edit-project js-general-settings-form" }, authenticity_token: true do |f|
   %input{ name: 'update_section', type: 'hidden', value: 'js-general-settings' }
   = form_errors(@project)
 

app/views/projects/snippets/verify.html.haml

-- form = [@project.namespace.becomes(Namespace), @project, @snippet.becomes(Snippet)]
-
-= render 'layouts/recaptcha_verification', spammable: @snippet, form: form
+= render 'layouts/recaptcha_verification', spammable: @snippet
 

app/views/projects/triggers/_form.html.haml

-= form_for [@project.namespace.becomes(Namespace), @project, @trigger], html: { class: 'gl-show-field-errors' } do |f|
+= form_for [@project, @trigger], html: { class: 'gl-show-field-errors' } do |f|
   = form_errors(@trigger)
 
   - if @trigger.token

app/views/search/_results.html.haml

@@ -8,7 +8,7 @@
       = search_entries_info(@search_objects, @scope, @search_term)
     - unless @show_snippets
       - if @project
-        - link_to_project = link_to(@project.full_name, [@project.namespace.becomes(Namespace), @project], class: 'ml-md-1')
+        - link_to_project = link_to(@project.full_name, @project, class: 'ml-md-1')
         - if @scope == 'blobs'
           - repository_ref = params[:repository_ref].to_s.presence || @project.default_branch
           = s_("SearchCodeResults|in")

app/views/search/results/_issue.html.haml

 .search-result-row
   %h4
     = confidential_icon(issue)
-    = link_to namespace_project_issue_path(issue.project.namespace.becomes(Namespace), issue.project, issue) do
+    = link_to project_issue_path(issue.project, issue) do
       %span.term.str-truncated= issue.title
     - if issue.closed?
       %span.badge.badge-danger.gl-ml-2= _("Closed")

app/views/search/results/_merge_request.html.haml

 .search-result-row
   %h4
-    = link_to namespace_project_merge_request_path(merge_request.target_project.namespace.becomes(Namespace), merge_request.target_project, merge_request) do
+    = link_to project_merge_request_path(merge_request.target_project, merge_request) do
       %span.term.str-truncated= merge_request.title
     - if merge_request.merged?
       %span.badge.badge-primary.gl-ml-2= _("Merged")

app/views/search/results/_milestone.html.haml

 .search-result-row
   %h4
-    = link_to namespace_project_milestone_path(milestone.project.namespace.becomes(Namespace), milestone.project, milestone) do
+    = link_to project_milestone_path(milestone.project, milestone) do
       %span.term.str-truncated= milestone.title
 
   - if milestone.description.present?

app/views/sent_notifications/unsubscribe.html.haml

@@ -3,7 +3,7 @@
 - noteable_text = show_unsubscribe_title?(noteable) ? %(#{noteable.title} (#{noteable.to_reference})) : %(#{noteable.to_reference})
 - show_project_path = can_read_project?(@sent_notification.project)
 - project_path = show_project_path ? @sent_notification.project.full_name : _("GitLab / Unsubscribe")
-- noteable_url = show_project_path ? url_for([@sent_notification.project.namespace.becomes(Namespace), @sent_notification.project, noteable]) : breadcrumb_title_link
+- noteable_url = show_project_path ? url_for([@sent_notification.project, noteable]) : breadcrumb_title_link
 - page_title _('Unsubscribe'), noteable_text, noteable_type.pluralize, project_path
 
 %h3.page-title

app/views/shared/deploy_keys/_project_group_form.html.haml

-= form_for [@project.namespace.becomes(Namespace), @project, @deploy_keys.new_key], url: namespace_project_deploy_keys_path, html: { class: "js-requires-input container" } do |f|
+= form_for [@project.namespace, @project, @deploy_keys.new_key], url: namespace_project_deploy_keys_path, html: { class: "js-requires-input container" } do |f|
   = form_errors(@deploy_keys.new_key)
   .form-group.row
     = f.label :title, class: "label-bold"

app/views/shared/issuable/_bulk_update_sidebar.html.haml

@@ -4,7 +4,7 @@
 
 %aside.issues-bulk-update.js-right-sidebar.right-sidebar{ "aria-live" => "polite", data: { 'signed-in': current_user.present? } }
   .issuable-sidebar.hidden
-    = form_tag [:bulk_update, @project.namespace.becomes(Namespace), @project, type], method: :post, class: "bulk-update" do
+    = form_tag [:bulk_update, @project, type], method: :post, class: "bulk-update" do
       .block.issuable-sidebar-header
         .filter-item.inline.update-issues-btn.float-left
           = button_tag _('Update all'), class: "btn update-selected-issues btn-info", disabled: true

app/views/shared/issuable/_form.html.haml

@@ -9,7 +9,7 @@
   .alert.alert-danger
     Someone edited the #{issuable.class.model_name.human.downcase} the same time you did.
     Please check out
-    = link_to "the #{issuable.class.model_name.human.downcase}", polymorphic_path([@project.namespace.becomes(Namespace), @project, issuable]), target: "_blank", rel: 'noopener noreferrer'
+    = link_to "the #{issuable.class.model_name.human.downcase}", polymorphic_path([@project, issuable]), target: "_blank", rel: 'noopener noreferrer'
     and make sure your changes will not unintentionally remove theirs
 
 = render 'shared/issuable/form/branch_chooser', issuable: issuable, form: form
@@ -63,11 +63,11 @@
 .row-content-block{ class: (is_footer ? "footer-block" : "middle-block") }
   .float-right
     - if issuable.new_record?
-      = link_to 'Cancel', polymorphic_path([@project.namespace.becomes(Namespace), @project, issuable.class]), class: 'btn btn-cancel'
+      = link_to 'Cancel', polymorphic_path([@project, issuable.class]), class: 'btn btn-cancel'
     - else
       - if can?(current_user, :"destroy_#{issuable.to_ability_name}", @project)
-        = link_to 'Delete', polymorphic_path([@project.namespace.becomes(Namespace), @project, issuable], params: { destroy_confirm: true }), data: { confirm: "#{issuable.human_class_name} will be removed! Are you sure?" }, method: :delete, class: 'btn btn-danger btn-grouped'
-      = link_to 'Cancel', polymorphic_path([@project.namespace.becomes(Namespace), @project, issuable]), class: 'btn btn-grouped btn-cancel'
+        = link_to 'Delete', polymorphic_path([@project, issuable], params: { destroy_confirm: true }), data: { confirm: "#{issuable.human_class_name} will be removed! Are you sure?" }, method: :delete, class: 'btn btn-danger btn-grouped'
+      = link_to 'Cancel', polymorphic_path([@project, issuable]), class: 'btn btn-grouped btn-cancel'
 
   %span.gl-mr-3
     - if issuable.new_record?

app/views/snippets/verify.html.haml

-- form = [@snippet.becomes(Snippet)]
-
-= render 'layouts/recaptcha_verification', spammable: @snippet, form: form
+= render 'layouts/recaptcha_verification', spammable: @snippet
 

app/views/users/calendar_activities.html.haml

@@ -20,7 +20,7 @@
               - if event.note?
                 = link_to event.note_target.to_reference, event_note_target_url(event), class: 'has-tooltip', title: event.target_title
               - elsif event.target
-                = link_to event.target.to_reference, [event.project.namespace.becomes(Namespace), event.project, event.target], class: 'has-tooltip', title: event.target_title
+                = link_to event.target.to_reference, [event.project, event.target], class: 'has-tooltip', title: event.target_title
 
           = s_('UserProfile|at')
           %strong

ee/app/views/projects/_merge_request_approvals_settings.html.haml

@@ -10,7 +10,7 @@
       = link_to _("Learn more about approvals."), help_page_path("user/project/merge_requests/merge_request_approvals"), target: '_blank'
 
   .settings-content
-    = form_for [@project.namespace.becomes(Namespace), @project], remote: true, html: { class: "merge-request-approval-settings-form js-mr-approvals-form" }, authenticity_token: true do |f|
+    = form_for @project, remote: true, html: { class: "merge-request-approval-settings-form js-mr-approvals-form" }, authenticity_token: true do |f|
       %input{ name: 'update_section', type: 'hidden', value: 'js-merge-request-approval-settings' }
       = render 'projects/merge_request_approvals_settings_form', form: f, project: @project
       = f.submit _("Save changes"), class: "btn btn-success qa-save-merge-request-approval-settings-button"

ee/app/views/projects/protected_environments/_form.html.haml

-= form_for [@project.namespace.becomes(Namespace), @project, @protected_environment], html: { class: 'new-protected-environment js-new-protected-environment' } do |f|
+= form_for [@project, @protected_environment], html: { class: 'new-protected-environment js-new-protected-environment' } do |f|
   .card
     .card-header
       %h3.card-title

ee/app/views/projects/protected_environments/_protected_environment.html.haml

@@ -9,4 +9,4 @@
 
   - if can_admin_project
     %td
-      = link_to s_('ProtectedEnvironment|Unprotect'), [@project.namespace.becomes(Namespace), @project, protected_environment], disabled: local_assigns[:disabled], data: { confirm: s_('ProtectedEnvironment|%{environment_name} will be writable for developers. Are you sure?') % { environment_name: protected_environment.name } }, method: :delete, class: 'btn btn-warning'
+      = link_to s_('ProtectedEnvironment|Unprotect'), [@project, protected_environment], disabled: local_assigns[:disabled], data: { confirm: s_('ProtectedEnvironment|%{environment_name} will be writable for developers. Are you sure?') % { environment_name: protected_environment.name } }, method: :delete, class: 'btn btn-warning'

ee/app/views/projects/push_rules/_index.html.haml

@@ -12,7 +12,7 @@
   .settings-content
     %h5
       Add new push rule
-    = form_for [@project.namespace.becomes(Namespace), @project, @push_rule] do |f|
+    = form_for [@project, @push_rule] do |f|
       = form_errors(@push_rule)
 
       = render "shared/push_rules/form", f: f, context: @project

ee/app/views/projects/settings/_default_issue_template.html.haml

@@ -7,7 +7,7 @@
       %p= _('Set a default template for issue descriptions.')
 
     .settings-content
-      = form_for [@project.namespace.becomes(Namespace), @project], remote: true, html: { multipart: true, class: "issue-settings-form" }, authenticity_token: true do |f|
+      = form_for @project, remote: true, html: { multipart: true, class: "issue-settings-form" }, authenticity_token: true do |f|
         %input{ type: 'hidden', name: 'update_section', value: 'js-issue-settings' }
         .row
           .form-group.col-md-9

ee/spec/routing/webhook_routes_spec.rb

@@ -9,7 +9,7 @@ RSpec.describe 'routes to the proper webhooks controller', type: :routing do
 
     it 'routes the test action' do
       expect(
-        post: polymorphic_path([project.namespace.becomes(Namespace), project, project_hook], action: :test)
+        post: polymorphic_path([project, project_hook], action: :test)
       ).to route_to(controller: 'projects/hooks',
                     action: 'test',
                     namespace_id: project.namespace.path,
@@ -19,7 +19,7 @@ RSpec.describe 'routes to the proper webhooks controller', type: :routing do
 
     it 'routes a single record' do
       expect(
-        delete: polymorphic_path([project.namespace.becomes(Namespace), project, project_hook])
+        delete: polymorphic_path([project, project_hook])
       ).to route_to(controller: 'projects/hooks',
                     action: 'destroy',
                     namespace_id: project.namespace.path,

lib/gitlab/database/rename_reserved_paths_migration/v1/rename_namespaces.rb

@@ -45,7 +45,7 @@ module Gitlab
             reverts_for_type('namespace') do |path_before_rename, current_path|
               matches_path = MigrationClasses::Route.arel_table[:path].matches(current_path)
               namespace = MigrationClasses::Namespace.joins(:route)
-                            .find_by(matches_path)&.becomes(MigrationClasses::Namespace)
+                            .find_by(matches_path)&.becomes(MigrationClasses::Namespace) # rubocop: disable Cop/AvoidBecomes
 
               if namespace
                 perform_rename(namespace, current_path, path_before_rename)

lib/gitlab/slash_commands/presenters/base.rb

@@ -69,7 +69,6 @@ module Gitlab
         def resource_url
           url_for(
             [
-              resource.project.namespace.becomes(Namespace),
               resource.project,
               resource
             ]

lib/gitlab/slash_commands/presenters/issue_search.rb

@@ -22,7 +22,7 @@ module Gitlab
 
         def attachments
           resource.map do |issue|
-            url = "[#{issue.to_reference}](#{url_for([namespace, project, issue])})"
+            url = "[#{issue.to_reference}](#{url_for([project, issue])})"
 
             {
               color: color(issue),
@@ -39,10 +39,6 @@ module Gitlab
         def project
           @project ||= resource.first.project
         end
-
-        def namespace
-          @namespace ||= project.namespace.becomes(Namespace)
-        end
       end
     end
   end

rubocop/cop/avoid_becomes.rb

+# frozen_string_literal: true
+
+module RuboCop
+  module Cop
+    # Cop that blacklists the use of ".becomes(SomeConstant)".
+    #
+    # The use of becomes() will result in a new object being created, throwing
+    # away any eager loaded assocations. This in turn can cause N+1 query
+    # problems, even when a developer eager loaded all necessary associations.
+    #
+    # See https://gitlab.com/gitlab-org/gitlab/-/issues/23182 for more information.
+    class AvoidBecomes < RuboCop::Cop::Cop
+      MSG = 'Avoid the use of becomes(SomeConstant), as this creates a ' \
+        'new object and throws away any eager loaded associations. ' \
+        'When creating URLs in views, just use the path helpers directly. ' \
+        'For example, instead of `link_to(..., [group.becomes(Namespace), ...])` ' \
+        'use `link_to(..., namespace_foo_path(group, ...))`. Most of the time there is no ' \
+        'need to pass in namespace to the path helpers after implementaton of ' \
+        'https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/12566'
+
+      def_node_matcher :becomes?, <<~PATTERN
+        (send {send ivar lvar} :becomes ...)
+      PATTERN
+
+      def on_send(node)
+        add_offense(node, location: :expression) if becomes?(node)
+      end
+    end
+  end
+end

spec/controllers/projects/merge_requests_controller_spec.rb

@@ -334,7 +334,7 @@ RSpec.describe Projects::MergeRequestsController do
       it 'closes MR without errors' do
         update_merge_request(state_event: 'close')
 
-        expect(response).to redirect_to([merge_request.target_project.namespace.becomes(Namespace), merge_request.target_project, merge_request])
+        expect(response).to redirect_to([merge_request.target_project, merge_request])
         expect(merge_request.reload.closed?).to be_truthy
       end
 
@@ -343,7 +343,7 @@ RSpec.describe Projects::MergeRequestsController do
 
         update_merge_request(title: 'New title')
 
-        expect(response).to redirect_to([merge_request.target_project.namespace.becomes(Namespace), merge_request.target_project, merge_request])
+        expect(response).to redirect_to([merge_request.target_project, merge_request])
         expect(merge_request.reload.title).to eq 'New title'
       end
 

spec/helpers/notes_helper_spec.rb

@@ -284,7 +284,7 @@ RSpec.describe NotesHelper do
       @snippet = create(:project_snippet, project: @project)
       @note = create(:note_on_personal_snippet)
 
-      expect(helper.form_resources).to eq([@project.namespace, @project, @note])
+      expect(helper.form_resources).to eq([@project, @note])
     end
 
     it 'returns namespace, project and note path for other noteables' do
@@ -292,7 +292,7 @@ RSpec.describe NotesHelper do
       @project = create(:project, path: 'test', namespace: namespace)
       @note = create(:note_on_issue, project: @project)
 
-      expect(helper.form_resources).to eq([@project.namespace, @project, @note])
+      expect(helper.form_resources).to eq([@project, @note])
     end
   end
 

spec/models/concerns/manual_inverse_association_spec.rb

@@ -14,7 +14,7 @@ RSpec.describe ManualInverseAssociation do
     stub_const("#{described_class}::Model", model)
   end
 
-  let(:instance) { create(:merge_request).becomes(model) }
+  let(:instance) { create(:merge_request).becomes(model) } # rubocop: disable Cop/AvoidBecomes
 
   describe '.manual_inverse_association' do
     context 'when the relation exists' do

spec/presenters/event_presenter_spec.rb

@@ -35,7 +35,7 @@ RSpec.describe EventPresenter do
     context 'with project label' do
       subject { project_event.present.target_link_options }
 
-      it { is_expected.to eq([group.becomes(Namespace), project, target]) }
+      it { is_expected.to eq([project, target]) }
     end
   end
 end

spec/rubocop/cop/avoid_becomes_spec.rb

+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+require 'rubocop'
+require 'rubocop/rspec/support'
+require_relative '../../../rubocop/cop/avoid_becomes'
+
+RSpec.describe RuboCop::Cop::AvoidBecomes, type: :rubocop do
+  include CopHelper
+
+  subject(:cop) { described_class.new }
+
+  it 'flags the use of becomes with a constant parameter' do
+    inspect_source('foo.becomes(Project)')
+
+    expect(cop.offenses.size).to eq(1)
+  end
+
+  it 'flags the use of becomes with a namespaced constant parameter' do
+    inspect_source('foo.becomes(Namespace::Group)')
+
+    expect(cop.offenses.size).to eq(1)
+  end
+
+  it 'flags the use of becomes with a dynamic parameter' do
+    inspect_source(<<~RUBY)
+    model = Namespace
+    project = Project.first
+    project.becomes(model)
+    RUBY
+
+    expect(cop.offenses.size).to eq(1)
+  end
+end