feat(api): implement endpoints to products, customer and sales.

tienda_ilusion/don_confiao/serializers.py

@@ -1,6 +1,6 @@
 from rest_framework import serializers
 
-from .models import Sale, SaleLine
+from .models import Sale, SaleLine, Product, Customer
 
 
 class SaleLineSerializer(serializers.ModelSerializer):
@@ -9,9 +9,31 @@ class SaleLineSerializer(serializers.ModelSerializer):
         fields = ['id', 'sale', 'product', 'unit_price', 'quantity']
 
 
-class SaleSerializer(serializers.ModelSerializer):
+class SaleWithLinesSerializer(serializers.ModelSerializer):
     lines = SaleLineSerializer(many=True)
 
     class Meta:
         model = Sale
         fields = ['id', 'customer', 'date', 'lines']
+
+
+class SaleSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Sale
+        fields = ['id', 'customer', 'date']
+
+    def to_representation(self, instance):
+        representation = super().to_representation(instance)
+        representation['lines'] = [line for line in instance.saleline_set.all().values()]
+        return representation
+
+
+class ProductSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Product
+        fields = ['name', 'price', 'measuring_unit', 'categories']
+
+class CustomerSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Customer
+        fields = ['name', 'address']