Added some logic

backend/apps/books/models.py

@@ -1,11 +1,11 @@
 from django.db import models
 
 from apps.shelves.models import Shelf
-# from apps.authors.models import Author
+from apps.authors.models import Author
 from apps.user.models import User
 
 class Book(models.Model):
-    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name="Authors")
-    # authors = models.ManyToManyField(Author, related_name="books")
+    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name="books")
+    authors = models.ManyToManyField(Author, related_name="books")
     name = models.CharField(max_length=255)
     isbn = models.CharField(max_length=13)

backend/apps/books/serializers.py

@@ -1,17 +1,27 @@
 from rest_framework import serializers
 
-from apps.books.models import Book
 from apps.shelves.serializers import ShelfSerializer
+from apps.authors.serializers import AuthorSerializer
+from apps.books.models import Book
 from apps.shelves.models import Shelf
+from apps.authors.models import Author
 
 class BookSerializer(serializers.ModelSerializer):
-    #shelf = ShelfSerializer(read_only=True)
-    #shelf_id = serializers.PrimaryKeyRelatedField(
-        #queryset=Shelf.objects.all(),
-        #source="shelf", 
-        #write_only=True
-    #)
+    shelf = ShelfSerializer(read_only=True)
+    shelf_id = serializers.PrimaryKeyRelatedField(
+        queryset=Shelf.objects.all(),
+        source="shelf", 
+        write_only=True
+    )
     
+    authors = AuthorSerializer(many=True, read_only=True)
+    authors_id = serializers.PrimaryKeyRelatedField(
+        queryset=Author.objects.all(),
+        source="authors",
+        many=True,
+        allow_null=True,
+        write_only=True
+    )
     
     class Meta: 
         model = Book
@@ -19,7 +29,30 @@ class BookSerializer(serializers.ModelSerializer):
             "id",
             "name",
             "isbn", 
-            #"shelf",
-            #"shelf_id"
+            "shelf",
+            "shelf_id",
+            "authors",
+            "authors_id"
         ]
-        read_only_fields = ["id"]
+        read_only_fields = ["id"]
+    
+
+    def __init__(self, instance=None, data=..., **kwargs):
+        super().__init__(instance, data, **kwargs)
+
+        request = self.context.get("request")        
+        if request and request.user:
+            self.fields["shelf_id"].queryset = Shelf.objects.filter(
+                user=request.user
+            )
+
+            self.fields["authors_id"].queryset = Author.objects.filter(
+                user=request.user
+            )
+
+            
+    def create(self, validated_data):
+        request = self.context["request"]
+        validated_data["user"] = request.user
+
+        return super().create(validated_data)

backend/apps/books/views.py

@@ -16,4 +16,4 @@ class BooksViewSet(viewsets.ModelViewSet):
     def get_queryset(self):
         return self.queryset.filter(
             shelf__user_id=self.request.user.pk
-        )
+        ).prefetch_related("authors")