Fix grader csv download for marks spreadsheets (#7257)

Changelog.md

@@ -13,6 +13,7 @@
 - Fix incorrect calculation of token penalties when submissions are on time (#7216)
 - Ensured submissions that have been released cannot be recollected from the repo browser (#7254)
 - Fix bug where renaming a group to an existing group in a different assignment resulted in incorrect repository mapping (#7224)
+- Fix Marks Spreadsheet csv bug of showing incorrect marks (#7257)
 
 ### 🔧 Internal changes
 

app/models/grade_entry_form.rb

@@ -122,11 +122,10 @@ def export_as_csv(role)
                        .group_by { |x| x[0] }
       num_items = self.grade_entry_items.count
     elsif role.ta?
-      grade_data = role.grade_entry_students
-                       .joins(:user)
-                       .joins(:grades)
-                       .joins(:grade_entry_items)
-                       .where(grade_entry_form: self)
+      grade_data = self.grades
+                       .joins(:grade_entry_item, grade_entry_student: :user)
+                       .joins(grade_entry_student: :grade_entry_student_tas)
+                       .where('grade_entry_student_tas.ta_id': role.id)
                        .pluck('users.user_name', 'grade_entry_items.position', 'grades.grade')
                        .group_by { |x| x[0] }
       num_items = self.grade_entry_items.count

spec/models/grade_entry_form_spec.rb

@@ -385,4 +385,47 @@
       end
     end
   end
+
+  describe 'when TA downloads a csv file of the grades' do
+    let(:ta) { create(:ta) }
+    let!(:student1) { create(:student) }
+    let!(:student2) { create(:student) }
+    let!(:grade_entry_form_with_data) { create(:grade_entry_form_with_data) }
+
+    before do
+      grade_entry_student1 = GradeEntryStudent.find_by(role: student1)
+      grade_entry_student2 = GradeEntryStudent.find_by(role: student2)
+
+      GradeEntryStudentTa.create(grade_entry_student: grade_entry_student1, ta: ta)
+      GradeEntryStudentTa.create(grade_entry_student: grade_entry_student2, ta: ta)
+
+      item2 = create(:grade_entry_item, name: 'Test2', position: 2, grade_entry_form: grade_entry_form_with_data)
+
+      grade_entry_student1.grades.create(grade: Random.rand(item2.out_of), grade_entry_item: item2)
+      grade_entry_student1.save
+
+      grade_entry_student2.grades.create(grade: Random.rand(item2.out_of), grade_entry_item: item2)
+      grade_entry_student2.save
+
+      grade_spreadsheet = grade_entry_form_with_data.export_as_csv(ta)
+      results = CSV.parse(grade_spreadsheet, headers: false).drop(2)
+
+      @res_marks = {}
+      results.each do |x|
+        mark1 = x[6] == '' ? nil : x[6].to_f
+        mark2 = x[7] == '' ? nil : x[7].to_f
+        @res_marks[x[0]] = [mark1, mark2]
+      end
+
+      @student_marks = {}
+      @student_marks[student1.user.user_name] =
+        [grade_entry_student1.grades.first.grade, grade_entry_student1.grades.second.grade]
+      @student_marks[student2.user.user_name] =
+        [grade_entry_student2.grades.first.grade, grade_entry_student2.grades.second.grade]
+    end
+
+    it 'correctly displays the marks' do
+      expect(@res_marks).to eq(@student_marks)
+    end
+  end
 end