Implement create from volume function

recircle/template/models.py

 from django.db import models
+from django.contrib.auth.models import User
+from django.conf import settings
 
 from image.models import Disk
+from image.models import Image
+from interface_openstack.implementation.storage.openstack_snapshot_manager import SnapshotManager 
 
 
 class BaseTemplate(models.Model):
@@ -29,7 +33,15 @@ class BaseTemplate(models.Model):
         editable=False,
         help_text="Date, when the template created."
     )
-    # owner = models.ForeignKey(User)
+    created_by = models.ForeignKey(
+        User,
+        on_delete=models.DO_NOTHING,
+        related_name=("created_templates")
+    )
+    # lease
+    # flavour
+    
+
 
 
 class Template(BaseTemplate):
@@ -40,10 +52,24 @@ class Template(BaseTemplate):
         help_text="The disk where the template is located."
     )
 
+    @classmethod
+    def create_from_volume(cls, name, description, disk, user):
+        interface = SnapshotManager(settings.CONNECTION)
+        remote_template = interface.create_from_volume(disk.remote_ID)
+        remote_id = remote_template.id
+        new_template = cls.object.create(
+            name=name,
+            description=description,
+            disk=disk,
+            remote_ID=remote_id,
+            created_by=user
+        )
+        return new_template
 
-# class PureTemplate(BaseTemplate):
-#     images = modesl.ForeignKey(
-#         Image,
-#         related_name="templates",
-#         on_delete=models.CASCADE
-#     )
+    
+class PureTemplate(BaseTemplate):
+    images = models.ForeignKey(
+        Image,
+        related_name="templates",
+        on_delete=models.CASCADE
+    )