Add method

app/models/merge_request.rb

@@ -327,6 +327,13 @@ class MergeRequest < ActiveRecord::Base
     !source_project.forked_from?(target_project)
   end
+  def can_reopen?
+    return false if closed_without_fork? || closed_without_source_project?
+    return true if closed?
+
+    # false
+  end
+
   def ensure_merge_request_diff
     merge_request_diff || create_merge_request_diff
   end

spec/models/merge_request_spec.rb

@@ -1076,4 +1076,17 @@ describe MergeRequest, models: true do
       end
     end
   end
+
+  describe '#can_reopen?' do
+    it "returns true" do
+      subject.close
+      binding.pry
+
+      expect(subject.can_reopen?).to be_truthy
+    end
+
+    it "returns false" do
+      expect(subject.can_reopen?).to be_falsey
+    end
+  end
 end