feat:add constraints for start and end dates/times

Author: arunPdl02

…990cd930610_created_events_info_table.py …sions/f4c493a24799_create_event_table.pysrc/alembic/versions/0990cd930610_created_events_info_table.py renamed to src/alembic/versions/f4c493a24799_create_event_table.py src/alembic/versions/0990cd930610_created_events_info_table.py renamed to src/alembic/versions/f4c493a24799_create_event_table.py

@@ -1,8 +1,8 @@
-"""created events_info table
+"""create_event_table
 
-Revision ID: 0990cd930610
+Revision ID: f4c493a24799
 Revises: 0a2c458d1ddd
-Create Date: 2026-05-09 23:53:01.667539
+Create Date: 2026-05-15 23:00:45.680647
 
 """
 from typing import Sequence, Union
@@ -12,7 +12,7 @@
 
 
 # revision identifiers, used by Alembic.
-revision: str = '0990cd930610'
+revision: str = 'f4c493a24799'
 down_revision: Union[str, None] = '0a2c458d1ddd'
 branch_labels: Union[str, Sequence[str], None] = None
 depends_on: Union[str, Sequence[str], None] = None
@@ -29,6 +29,8 @@ def upgrade() -> None:
     sa.Column('repeat', sa.String(length=64), nullable=False),
     sa.Column('start_date', sa.Date(), nullable=True),
     sa.Column('end_date', sa.Date(), nullable=True),
+    sa.CheckConstraint('start_date < end_date', name=op.f('ck_event_info_check_start_date_before_end_date')),
+    sa.CheckConstraint('start_time < end_time', name=op.f('ck_event_info_check_start_time_before_end_time')),
     sa.PrimaryKeyConstraint('eid', name=op.f('pk_event_info'))
     )
     # ### end Alembic commands ###

src/event/crud.py

@@ -65,7 +65,7 @@ async def create_event(
     db_session: AsyncSession,
     info: EventDB
 ):
-    await db_session.add(info)
+    db_session.add(info)
 
 
 async def delete_event(

src/event/tables.py

@@ -3,7 +3,8 @@
     String,
     DateTime,
     Text,
-    Date
+    Date,
+    CheckConstraint
 )
 from sqlalchemy.orm import Mapped, mapped_column
 
@@ -35,15 +36,27 @@ class EventDB(Base):
         nullable=True
     )
 
+    __table_args__ = (
+        CheckConstraint(
+            'start_time < end_time',
+            name='check_start_time_before_end_time'
+        ),
+        CheckConstraint(
+            'start_date < end_date',
+            name='check_start_date_before_end_date'
+        )
+    )
+    
+
     def serialize(self) -> dict:
         return{
             "eid": self.eid,
             "name": self.name,
             "description": self.description,
             "start_time": self.start_time,
-            "end_time": self.start_time,
-            "start_date": self.start_time,
-            "end_date": self.start_time,
+            "end_time": self.end_time,
+            "start_date": self.start_date,
+            "end_date": self.end_date,
         }