fix: add default None to optional command schema fields

Per OCPI spec, fields like evse_uid, connector_id, and
authorization_reference in StartSession and ReserveNow are optional
(cardinality ?). Without `= None` default, Pydantic v2 requires them
to be present in the request body even if null, causing 422 errors
when callers correctly omit them.

Made-with: Cursor

Author: Alfonso Sastre

ocpi/modules/commands/v_2_1_1/schemas.py

@@ -23,7 +23,7 @@ class ReserveNow(BaseModel):
     expiry_date: DateTime
     reservation_id: int
     location_id: String(36)  # type: ignore
-    evse_uid: String(39) | None  # type: ignore
+    evse_uid: String(39) | None = None  # type: ignore
 
 
 class StartSession(BaseModel):
@@ -34,7 +34,7 @@ class StartSession(BaseModel):
     response_url: URL
     token: Token
     location_id: String(39)  # type: ignore
-    evse_uid: String(39) | None  # type: ignore
+    evse_uid: String(39) | None = None  # type: ignore
 
 
 class StopSession(BaseModel):

ocpi/modules/commands/v_2_2_1/schemas.py

@@ -46,8 +46,8 @@ class ReserveNow(BaseModel):
     expiry_date: DateTime
     reservation_id: CiString(36)  # type: ignore
     location_id: CiString(36)  # type: ignore
-    evse_uid: CiString(36) | None  # type: ignore
-    authorization_reference: CiString(36) | None  # type: ignore
+    evse_uid: CiString(36) | None = None  # type: ignore
+    authorization_reference: CiString(36) | None = None  # type: ignore
 
 
 class StartSession(BaseModel):
@@ -58,9 +58,9 @@ class StartSession(BaseModel):
     response_url: URL
     token: Token
     location_id: CiString(36)  # type: ignore
-    evse_uid: CiString(36) | None  # type: ignore
-    connector_id: CiString(36) | None  # type: ignore
-    authorization_reference: CiString(36) | None  # type: ignore
+    evse_uid: CiString(36) | None = None  # type: ignore
+    connector_id: CiString(36) | None = None  # type: ignore
+    authorization_reference: CiString(36) | None = None  # type: ignore
 
 
 class StopSession(BaseModel):

ocpi/modules/commands/v_2_3_0/schemas.py

@@ -46,8 +46,8 @@ class ReserveNow(BaseModel):
     expiry_date: DateTime
     reservation_id: CiString(36)  # type: ignore
     location_id: CiString(36)  # type: ignore
-    evse_uid: CiString(36) | None  # type: ignore
-    authorization_reference: CiString(36) | None  # type: ignore
+    evse_uid: CiString(36) | None = None  # type: ignore
+    authorization_reference: CiString(36) | None = None  # type: ignore
 
 
 class StartSession(BaseModel):
@@ -58,9 +58,9 @@ class StartSession(BaseModel):
     response_url: URL
     token: Token
     location_id: CiString(36)  # type: ignore
-    evse_uid: CiString(36) | None  # type: ignore
-    connector_id: CiString(36) | None  # type: ignore
-    authorization_reference: CiString(36) | None  # type: ignore
+    evse_uid: CiString(36) | None = None  # type: ignore
+    connector_id: CiString(36) | None = None  # type: ignore
+    authorization_reference: CiString(36) | None = None  # type: ignore
 
 
 class StopSession(BaseModel):