Fix error updating venue information (#48)

* Add missing param to update_from_dict method

* Add validation for fields in update_from_dict method and handle ForeignKey assignments

* Fix syntax error in update_from_dict method for field existence check

* Fix ForeignKey assignment in TimestampedModel to ensure correct instance type

backend/treeckle/treeckle/common/models.py

@@ -7,6 +7,18 @@ class TimestampedModel(models.Model):
     class Meta:
         abstract = True
 
-    def update_from_dict(self, update_dict):
+    def update_from_dict(self, update_dict, commit=True):
         for field, value in update_dict.items():
-            setattr(self, field, value)
+            if not hasattr(self, field):
+                raise ValueError(f"Field '{field}' does not exist in model '{self.__class__.__name__}'")
+
+            field_instance = self._meta.get_field(field)
+            if isinstance(field_instance, models.ForeignKey):
+                related_model = field_instance.related_model
+                if not isinstance(value, related_model):
+                    value = related_model.objects.get(pk=value)
+
+            setattr(self, field, value)
+
+        if commit:
+            self.save()