Andrew and Alexander_django quieries_solution

ormQueries/products/product_crud.py

@@ -1,6 +1,86 @@
 from .models import Product 
+from django.db.models import Q
+from django.db.models import Avg, Max
+from django.db.models.functions import Length
+
+
 
 class ProductCrud:
     @classmethod
     def get_all_products(cls):
-        pass
+        return Product.objects.all()
+
+    @classmethod
+    def find_by_model(cls, model_name):
+        return Product.objects.get(model = model_name)
+
+    @classmethod
+    def last_record(cls):
+        return Product.objects.last()
+        #[e for e in Product.objects.all()][-1]
+
+    @classmethod
+    def by_rating(cls, rating):
+        return Product.objects.filter(rating = rating)
+
+    @classmethod
+    def by_rating_range(cls, rating_low, rating_high):
+        return Product.objects.filter(rating__range = (rating_low,rating_high))
+
+    @classmethod
+    def by_rating_and_color(cls, rating, color):
+        return Product.objects.filter(rating = rating, color = color)
+
+    @classmethod
+    def by_rating_or_color(cls, rating, color):
+        return Product.objects.filter(Q(rating = rating) | Q(color = color))
+
+    @classmethod
+    def no_color_count(cls):
+        return Product.objects.filter(color__isnull = True).count()
+
+    @classmethod
+    def below_price_or_above_rating(cls,below_price,above_rating):
+        return Product.objects.filter(Q(price_cents__lt = below_price) | Q(rating__gt = above_rating))
+
+    @classmethod
+    def ordered_by_category_alphabetical_order_and_then_price_decending(cls):
+        return Product.objects.order_by('category', '-price_cents')
+
+    @classmethod
+    def products_by_manufacturer_with_name_like(cls, input):
+        return Product.objects.filter(manufacturer__icontains = input)
+
+    @classmethod
+    def manufacturer_names_for_query(cls, input):
+        return Product.objects.filter(manufacturer__icontains = input).values_list('manufacturer',flat=True)
+
+    @classmethod
+    def not_in_a_category(cls, category):
+        return Product.objects.exclude(category = category)
+
+    @classmethod
+    def limited_not_in_a_category(cls, category, limit):
+        return Product.objects.exclude(category = category)[:limit]
+
+    @classmethod
+    def category_manufacturers(cls, category):
+        return Product.objects.filter(category = category).values_list('manufacturer' ,flat=True)
+
+    @classmethod
+    def average_category_rating(cls, category):
+        return Product.objects.filter(category = category).aggregate(Avg('rating'))
+
+    @classmethod
+    def greatest_price(cls):
+        return Product.objects.all().aggregate(Max('price_cents'))
+
+    @classmethod
+    def longest_model_name(cls):
+        return Product.objects.order_by(Length('model')).values_list('id', flat=True).last()
+
+    @classmethod
+    def ordered_by_model_length(cls):
+        return Product.objects.order_by(Length('model'))
+
+