better migrations

migrations/versions/add_events_table.py

@@ -0,0 +1,42 @@
+"""create events table
+
+Revision ID: add_events_table
+Revises: f18735338888
+Create Date: 2024-03-19 10:00:00.000000
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy import inspect
+
+# revision identifiers, used by Alembic.
+revision = 'add_events_table'
+down_revision = 'f18735338888'
+branch_labels = None
+depends_on = None
+
+def upgrade():
+    conn = op.get_bind()
+    inspector = inspect(conn)
+    tables = inspector.get_table_names()
+    
+    if 'events' not in tables:
+        op.create_table(
+            'events',
+            sa.Column('id', sa.Integer, primary_key=True),
+            sa.Column('event_type', sa.String(50), nullable=False),
+            sa.Column('user_id', sa.Integer, sa.ForeignKey('user.id'), nullable=True),
+            sa.Column('timestamp', sa.DateTime, nullable=False),
+            sa.Column('details', sa.JSON),
+            sa.Column('ip_address', sa.String(45)),
+            sa.Column('user_agent', sa.String(255)),
+        )
+        op.create_index('idx_events_event_type', 'events', ['event_type'])
+        op.create_index('idx_events_timestamp', 'events', ['timestamp'])
+        op.create_index('idx_events_user_id', 'events', ['user_id'])
+
+def downgrade():
+    op.drop_index('idx_events_event_type', table_name='events')
+    op.drop_index('idx_events_timestamp', table_name='events')
+    op.drop_index('idx_events_user_id', table_name='events')
+    op.drop_table('events')