Mark Commit persisted

Signed-off-by: NRémy Coutable <remy@rymai.me>

app/models/commit.rb

@@ -318,6 +318,14 @@ class Commit
     Gitlab::Diff::FileCollection::Commit.new(self, diff_options: diff_options)
   end
 
+  def persisted?
+    true
+  end
+
+  def touch
+    # no-op but needs to be defined since #persisted? is defined
+  end
+
   private
 
   def commit_reference(from_project, referable_commit_id, full: false)

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

@@ -13,7 +13,7 @@
         %a.close{ href: "#", "data-dismiss" => "modal" } ×
         %h3.page-title== #{label} this #{commit.change_type_title(current_user)}
       .modal-body
-        = form_tag send("#{type.underscore}_namespace_project_commit_path", @project.namespace, @project, commit.id), method: :post, remote: false, class: "form-horizontal js-#{type}-form js-requires-input" do
+        = form_tag [type.underscore, @project.namespace, @project, commit], method: :post, remote: false, class: "form-horizontal js-#{type}-form js-requires-input" do
           .form-group.branch
             = label_tag 'target_branch', target_label, class: 'control-label'
             .col-sm-10