Add field validator to accept date strings and convert to datetime

backend/app/schemas/chore.py

@@ -1,7 +1,8 @@
 """Chore schemas."""
-from pydantic import BaseModel, ConfigDict
-from typing import Optional
-from datetime import datetime
+from pydantic import BaseModel, ConfigDict, field_validator
+from typing import Optional, Union
+from datetime import datetime, date
+
 from app.models.chore import ChoreFrequency, ChoreStatus
 
 
@@ -12,7 +13,22 @@ class ChoreBase(BaseModel):
     room: str
     frequency: ChoreFrequency
     assigned_user_id: Optional[int] = None
-    due_date: Optional[datetime] = None
+    due_date: Optional[Union[datetime, date, str]] = None
+    
+    @field_validator('due_date', mode='before')
+    @classmethod
+    def parse_due_date(cls, v):
+        """Parse due_date to handle various formats."""
+        if v is None or isinstance(v, (datetime, date)):
+            return v
+        if isinstance(v, str):
+            # Try parsing as datetime first
+            for fmt in ['%Y-%m-%dT%H:%M:%S', '%Y-%m-%d']:
+                try:
+                    return datetime.strptime(v, fmt)
+                except ValueError:
+                    continue
+        return v
 
 
 class ChoreCreate(ChoreBase):
@@ -28,7 +44,22 @@ class ChoreUpdate(BaseModel):
     frequency: Optional[ChoreFrequency] = None
     status: Optional[ChoreStatus] = None
     assigned_user_id: Optional[int] = None
-    due_date: Optional[datetime] = None
+    due_date: Optional[Union[datetime, date, str]] = None
+    
+    @field_validator('due_date', mode='before')
+    @classmethod
+    def parse_due_date(cls, v):
+        """Parse due_date to handle various formats."""
+        if v is None or isinstance(v, (datetime, date)):
+            return v
+        if isinstance(v, str):
+            # Try parsing as datetime first
+            for fmt in ['%Y-%m-%dT%H:%M:%S', '%Y-%m-%d']:
+                try:
+                    return datetime.strptime(v, fmt)
+                except ValueError:
+                    continue
+        return v
 
 
 class AssignedUser(BaseModel):