fixed migrations

migrations/versions/dbcb5d2d3ed0_add_contact_model.py

@@ -7,6 +7,7 @@ Create Date: 2025-05-23 08:55:10.537722
 """
 from alembic import op
 import sqlalchemy as sa
+from sqlalchemy import inspect
 
 
 # revision identifiers, used by Alembic.
@@ -35,9 +36,17 @@ def upgrade():
     sa.PrimaryKeyConstraint('id'),
     sa.UniqueConstraint('email')
     )
+    
+    # Check if columns exist before adding them
+    conn = op.get_bind()
+    inspector = inspect(conn)
+    columns = [col['name'] for col in inspector.get_columns('user')]
+    
     with op.batch_alter_table('user', schema=None) as batch_op:
-        batch_op.add_column(sa.Column('is_admin', sa.Boolean(), nullable=True))
-        batch_op.add_column(sa.Column('created_at', sa.DateTime(), nullable=True))
+        if 'is_admin' not in columns:
+            batch_op.add_column(sa.Column('is_admin', sa.Boolean(), nullable=True))
+        if 'created_at' not in columns:
+            batch_op.add_column(sa.Column('created_at', sa.DateTime(), nullable=True))
 
     # ### end Alembic commands ###