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Initial fix for duplicate subject queries in student status

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Keannu Christian Bernasol 2023-09-03 17:46:36 +08:00
parent 451c5ec00b
commit 6fe1042826
20 changed files with 87 additions and 95 deletions
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3
stude/subjects/admin.py
View file

@ -1,4 +1,5 @@
from django.contrib import admin
from .models import Subject
from .models import Subject, SubjectInstance
admin.site.register(Subject)
admin.site.register(SubjectInstance)

20
stude/subjects/migrations/0001_initial.py
View file

@ -1,4 +1,4 @@
# Generated by Django 4.2.3 on 2023-08-06 05:55
# Generated by Django 4.2.3 on 2023-09-03 09:32
from django.conf import settings
from django.db import migrations, models
@ -10,10 +10,10 @@ class Migration(migrations.Migration):
initial = True
dependencies = [
('semesters', '0001_initial'),
migrations.swappable_dependency(settings.AUTH_USER_MODEL),
('courses', '0001_initial'),
('year_levels', '0001_initial'),
('semesters', '0001_initial'),
('courses', '0001_initial'),
migrations.swappable_dependency(settings.AUTH_USER_MODEL),
]
operations = [
@ -22,14 +22,18 @@ class Migration(migrations.Migration):
fields=[
('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('name', models.CharField(max_length=64)),
('students', models.ManyToManyField(blank=True, to=settings.AUTH_USER_MODEL)),
],
),
migrations.CreateModel(
name='SubjectInstance',
fields=[
('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('code', models.CharField(max_length=16)),
('course', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='courses.course')),
('semester', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='semesters.semester')),
('students', models.ManyToManyField(blank=True, to=settings.AUTH_USER_MODEL)),
('subject', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='subjects.subject')),
('year_level', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='year_levels.year_level')),
],
options={
'unique_together': {('name', 'course', 'year_level', 'semester')},
},
),
]

48
stude/subjects/models.py
View file

@ -15,6 +15,14 @@ class Subject(models.Model):
name = models.CharField(max_length=64)
students = models.ManyToManyField(
CustomUser, blank=True)
def __str__(self):
return self.name
class SubjectInstance(models.Model):
subject = models.ForeignKey(
Subject, on_delete=models.CASCADE)
code = models.CharField(max_length=16)
course = models.ForeignKey(
Course, on_delete=models.CASCADE)
@ -23,11 +31,8 @@ class Subject(models.Model):
semester = models.ForeignKey(
Semester, on_delete=models.CASCADE)
class Meta:
unique_together = ['name', 'course', 'year_level', 'semester']
def __str__(self):
return f'Subject: {self.name}({self.code}) - {self.course.shortname} - {self.year_level} - {self.semester}'
return f'Subject: {self.subject.name}({self.code}) - {self.course.shortname} - {self.year_level} - {self.semester}'
# Create subjects on initial migrate
@ -82,17 +87,32 @@ def populate_subjects(sender, **kwargs):
semester = Semester.objects.filter(
name=subject_semester).first()
# If subject exists, skip over
if (Subject.objects.filter(name=subject_name, course=course, year_level=year_level, semester=semester, code=subject_code).exists()):
# print('Duplicate subject')
existing_subjects += 1
continue
# If subject does not exist at all, then create new subject
else:
# Check if subject exists
if (Subject.objects.filter(name=subject_name).exists()):
# If so, get the subject
SUBJECT, created = Subject.objects.get_or_create(
name=subject_name, course=course, year_level=year_level, semester=semester, code=subject_code)
name=subject_name)
# Then check if subject instance exists
if (SubjectInstance.objects.filter(subject=SUBJECT, course=course, year_level=year_level, semester=semester, code=subject_code).exists()):
# If subject instance already exists, skip
existing_subjects += 1
continue
# If subject instance does not exist, create it
else:
SUBJECT, created = Subject.objects.get_or_create(
name=subject_name)
SUBJECT_INSTANCE, created = SubjectInstance.objects.get_or_create(
subject=SUBJECT, course=course, year_level=year_level, semester=semester, code=subject_code)
subject_count += 1
# If subject does not exist
else:
# Create subject first
SUBJECT, created = Subject.objects.get_or_create(
name=subject_name)
# Then create instance
SUBJECT_INSTANCE, created = SubjectInstance.objects.get_or_create(
subject=SUBJECT, course=course, year_level=year_level, semester=semester, code=subject_code)
subject_count += 1
# Set the course, year level, and semester of the subject

8
stude/subjects/serializers.py
View file

@ -1,11 +1,13 @@
from rest_framework import serializers
from .models import Subject
from .models import Subject, SubjectInstance
from courses.models import Course
from year_levels.models import Year_Level
from semesters.models import Semester
class SubjectSerializer(serializers.ModelSerializer):
year_level = serializers.SlugRelatedField(
queryset=Subject.objects.all(), slug_field='name', allow_null=False)
year_level = serializers.SlugRelatedField(
queryset=Year_Level.objects.all(), slug_field='name', allow_null=True)
semester = serializers.SlugRelatedField(
@ -14,5 +16,5 @@ class SubjectSerializer(serializers.ModelSerializer):
queryset=Course.objects.all(), slug_field='name', allow_null=True)
class Meta:
model = Subject
fields = ('id', 'name', 'code', 'course', 'year_level', 'semester')
model = SubjectInstance
fields = ('id', 'subject', 'code', 'course', 'year_level', 'semester')

14
stude/subjects/views.py
View file

@ -1,5 +1,5 @@
from rest_framework import generics, viewsets
from .models import Subject
from .models import Subject, SubjectInstance
from .serializers import SubjectSerializer
from rest_framework.views import APIView
from rest_framework.response import Response
@ -8,12 +8,12 @@ from rest_framework.permissions import IsAuthenticated
class SubjectListAllView(generics.ListAPIView):
serializer_class = SubjectSerializer
queryset = Subject.objects.all()
queryset = SubjectInstance.objects.all()
class SubjectListView(generics.ListAPIView):
permission_classes = [IsAuthenticated]
queryset = Subject.objects.all()
queryset = SubjectInstance.objects.all()
serializer_class = SubjectSerializer
def get(self, request):
@ -21,14 +21,14 @@ class SubjectListView(generics.ListAPIView):
user_course = user.course
# If user is irregular, show all subjects in his/her course to choose from
if (user.irregular):
subjects = Subject.objects.filter(
subjects = SubjectInstance.objects.filter(
course__name=user_course)
# Else, return subjects that match the user's student info (Year Level, Semster, Course)
else:
user_yearlevel = user.year_level
user_semester = user.semester
subjects = Subject.objects.filter(
subjects = SubjectInstance.objects.filter(
course__name=user.course, year_level__name=user_yearlevel, semester__name=user_semester)
# Serialize the subjects
@ -37,12 +37,12 @@ class SubjectListView(generics.ListAPIView):
class SubjectByCourseView(generics.ListAPIView):
queryset = Subject.objects.all()
queryset = SubjectInstance.objects.all()
serializer_class = SubjectSerializer
def get(self, request, course_slug):
# Retrieve the subjects based on course slug
subjects = Subject.objects.filter(
subjects = SubjectInstance.objects.filter(
course__shortname=course_slug)
# Serialize the subjects