create submission answers

Author: rockstarr-programmerr

.gitignore

@@ -7,5 +7,6 @@ media/
 .coverage
 htmlcov/
 temp/
+temp.*
 *.pid
 *.log

classroom/models/reading_submission.py

@@ -13,3 +13,6 @@ class ReadingSubmission(models.Model):
 
     class Meta:
         ordering = ['exercise', 'submitter', 'submit_datetime']
+
+    def get_answers(self):
+        return self.answers.all().values('question_number', 'content')

classroom/permissions.py

@@ -13,3 +13,13 @@ def has_permission(self, request, view):
                 request.method in SAFE_METHODS or is_teacher
             )
         )
+
+
+class IsStudent(IsAuthenticated):
+    message = _('Only student has permission for this.')
+
+    def has_permission(self, request, view):
+        return (
+            super().has_permission(request, view) and
+            request.user.is_student()
+        )

classroom/serializers/__init__.py

@@ -1,6 +1,7 @@
 from .classroom import (AddReadingExerciseSerializer, AddStudentSerializer,
                         ClassroomSerializer, RemoveReadingExerciseSerializer,
                         RemoveStudentSerializer)
-from .exercise import ReadingExerciseSerializer
+from .exercise import (ReadingExerciseSerializer,
+                       ReadingExerciseSubmitSerializer)
 from .question import ReadingQuestionSerializer
 from .reading_submission import ReadingSubmissionSerializer

classroom/serializers/exercise.py

@@ -1,7 +1,8 @@
 from django.utils.translation import gettext as _
 from rest_framework import serializers
 
-from classroom.models import ReadingExercise
+from classroom.models import (ReadingExercise, ReadingSubmission,
+                              ReadingSubmissionAnswer)
 from classroom.utils.serializer import ValidateUniqueTogetherMixin
 
 
@@ -23,3 +24,33 @@ def save(self, **kwargs):
         teacher = self.context['request'].user
         kwargs['creator'] = teacher
         return super().save(**kwargs)
+
+
+class _SubmitAnswerListSerializer(serializers.ListSerializer):
+    def save(self, exercise=None):
+        student = self.context['request'].user
+        submission = self._create_submission(student, exercise)
+        self._create_submission_answers(submission)
+
+    def _create_submission(self, student, exercise):
+        return ReadingSubmission.objects.create(submitter=student, exercise=exercise)
+
+    def _create_submission_answers(self, submission):
+        answers_to_create = []
+        for answer in self.validated_data:
+            answers_to_create.append(
+                ReadingSubmissionAnswer(
+                    submission=submission,
+                    question_number=answer['question_number'],
+                    content=answer['content'],
+                )
+            )
+        ReadingSubmissionAnswer.objects.bulk_create(answers_to_create)
+
+
+class ReadingExerciseSubmitSerializer(serializers.Serializer):
+    question_number = serializers.IntegerField(min_value=1)
+    content = serializers.CharField()
+
+    class Meta:
+        list_serializer_class = _SubmitAnswerListSerializer

classroom/serializers/reading_submission.py

@@ -3,9 +3,14 @@
 
 
 class ReadingSubmissionSerializer(serializers.HyperlinkedModelSerializer):
+    answers = serializers.ListField(source='get_answers')
+
     class Meta:
         model = ReadingSubmission
-        fields = ['pk', 'url', 'exercise', 'submitter', 'submit_datetime']
+        fields = [
+            'pk', 'url', 'exercise',
+            'submitter', 'submit_datetime', 'answers',
+        ]
         extra_kwargs = {
             'url': {'view_name': 'reading-submission-detail'},
             'exercise': {'view_name': 'reading-exercise-detail'},

classroom/views/exercise.py

@@ -1,9 +1,12 @@
+from rest_framework.decorators import action
+from rest_framework.response import Response
 from rest_framework.viewsets import ModelViewSet
 
 from classroom.filters import ReadingExerciseFilter
 from classroom.models import ReadingExercise
-from classroom.permissions import IsTeacherOrReadOnly
-from classroom.serializers import ReadingExerciseSerializer
+from classroom.permissions import IsStudent, IsTeacherOrReadOnly
+from classroom.serializers import (ReadingExerciseSerializer,
+                                   ReadingExerciseSubmitSerializer)
 
 
 class ReadingExerciseViewSet(ModelViewSet):
@@ -13,3 +16,17 @@ class ReadingExerciseViewSet(ModelViewSet):
     permission_classes = [IsTeacherOrReadOnly]
     ordering_fields = ['identifier']
     ordering = ['identifier']
+
+    @action(
+        methods=['POST'], detail=True, url_path='submit-answers',
+        serializer_class=ReadingExerciseSubmitSerializer,
+        permission_classes=[IsStudent],
+    )
+    def submit_answers(self, request, pk):
+        """Student submit their answer to this exercise.
+        """
+        serializer = self.get_serializer(data=request.data, many=True)
+        serializer.is_valid(raise_exception=True)
+        exercise = self.get_object()
+        serializer.save(exercise=exercise)
+        return Response()