initialize on_events to []

Author: andrii-i

jupyter_scheduler/models.py

@@ -223,7 +223,7 @@ class CreateJobDefinition(BaseModel):
     compute_type: Optional[str] = None
     schedule: Optional[str] = None
     timezone: Optional[str] = None
-    on_events: List[EventType] = None
+    on_events: List[EventType] = []
 
     @root_validator
     def compute_input_filename(cls, values) -> Dict:
@@ -249,7 +249,7 @@ class DescribeJobDefinition(BaseModel):
     create_time: int
     update_time: int
     active: bool
-    on_events: List[str] = None
+    on_events: List[EventType] = []
 
     class Config:
         orm_mode = True
@@ -269,7 +269,7 @@ class UpdateJobDefinition(BaseModel):
     active: Optional[bool] = None
     compute_type: Optional[str] = None
     input_uri: Optional[str] = None
-    on_events: List[str] = None
+    on_events: List[EventType] = []
 
 
 class ListJobDefinitionsQuery(BaseModel):