Also list snapshots for a VM

uncloud/uncloud_auth/models.py

@@ -8,8 +8,8 @@ from uncloud_pay.models import get_balance_for_user
 
 class User(AbstractUser):
     """
-    We use the standard user and add a maximum negative credit that is allowed
-    to be accumulated
+    We use the standard user and add a maximum credit that is allowed
+    to be accumulated. After that we need to have warnings, cancellation, etc.
     """
 
     maximum_credit = models.DecimalField(

uncloud/uncloud_vm/models.py

@@ -186,4 +186,6 @@ class VMSnapshotProduct(Product):
     gb_ssd = models.FloatField(editable=False)
     gb_hdd = models.FloatField(editable=False)
 
-    vm = models.ForeignKey(VMProduct, on_delete=models.CASCADE)
+    vm = models.ForeignKey(VMProduct,
+                           related_name='snapshots',
+                           on_delete=models.CASCADE)

uncloud/uncloud_vm/serializers.py

@@ -32,16 +32,20 @@ class VMDiskImageProductSerializer(serializers.ModelSerializer):
         fields = '__all__'
 
 class VMProductSerializer(serializers.ModelSerializer):
-    # Custom field used at creation (= ordering) only.
-    recurring_period = serializers.ChoiceField(
-            choices=VMProduct.allowed_recurring_periods())
-
     class Meta:
         model = VMProduct
-        fields = ['uuid', 'order', 'owner', 'status', 'name', \
-                'cores', 'ram_in_gb', 'recurring_period']
+        fields = ['uuid', 'order', 'owner', 'status', 'name',
+                  'cores', 'ram_in_gb', 'recurring_period',
+                  'snapshots' ]
         read_only_fields = ['uuid', 'order', 'owner', 'status']
 
+    # Custom field used at creation (= ordering) only.
+    recurring_period = serializers.ChoiceField(
+        choices=VMProduct.allowed_recurring_periods())
+
+    snapshots = serializers.PrimaryKeyRelatedField(many=True,
+                                                   read_only=True)
+
 
 class DCLVMProductSerializer(serializers.HyperlinkedModelSerializer):
     """