Fix a few query benchmarks for deprecations in Django

Author: timgraham

djangobench/benchmarks/query_delete_related/models.py

@@ -5,5 +5,5 @@ class Book(models.Model):
     title = models.CharField(max_length=100)
 
 class Chapter(models.Model):
-    book = models.ForeignKey(Book)
+    book = models.ForeignKey(Book, on_delete=models.CASCADE)
     title = models.CharField(max_length=100)

djangobench/benchmarks/query_prefetch_related/benchmark.py

@@ -15,11 +15,8 @@ def setup():
     from query_prefetch_related.models import Book, Author
     for i in range(0, 20):
         a = Author.objects.create(author="Author %s" % i)
-        bset = set()
-        for j in range(0, 3):
-            b = Book.objects.create(title="Title %s" % j)
-            bset.add(b)
-        a.books = bset
+        books = [Book.objects.create(title="Title %s" % j) for j in range(0, 3)]
+        a.books.add(*books)
 
 if VERSION < (1, 4):
     print("SKIP: prefetch_related not supported before Django 1.4")

djangobench/benchmarks/query_select_related/models.py

@@ -3,7 +3,7 @@
 
 class Book(models.Model):
     title = models.CharField(max_length=100)
-    author = models.ForeignKey('Author')
+    author = models.ForeignKey('Author', on_delete=models.CASCADE)
 
 class Author(models.Model):
     author = models.CharField(max_length=100)