serializers.py
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import datetime
from django.db.models import Q
from rest_framework import serializers
from chat.models import ChatVisualizations
from .models import Subject, Tag
class TagSerializer(serializers.ModelSerializer):
def validate(self, data):
query = Tag.objects.filter(name = data['name'])
if query.exists():
data['id'] = query[0].id
else:
data['id'] = ""
return data
class Meta:
model = Tag
fields = '__all__'
extra_kwargs = {
"name": {
"validators": [],
},
}
validators = []
class SubjectSerializer(serializers.ModelSerializer):
notifications = serializers.SerializerMethodField()
def get_notifications(self, subject):
user = self.context.get("request_user", None)
if not user is None:
return ChatVisualizations.objects.filter(Q(user = user) & Q(viewed = False) & Q(message__subject = subject) & (Q(user__is_staff = True) | Q(message__subject__students = user) | Q(message__subject__professor = user) | Q(message__subject__category__coordinators = user))).distinct().count()
return 0
class Meta:
model = Subject
fields = ["name", "slug", "visible", "description_brief", "description", "notifications"]