fix(alembic-migration)

backend/migrations/versions/0002_add_push_subscriptions.py

@@ -7,6 +7,7 @@ Create Date: 2025-01-27
 """
 from alembic import op
 import sqlalchemy as sa
+from sqlalchemy import inspect
 
 
 # revision identifiers, used by Alembic.
@@ -17,19 +18,25 @@ depends_on = None
 
 
 def upgrade():
-    op.create_table(
-        'push_subscriptions',
-        sa.Column('id', sa.Integer(), nullable=False),
-        sa.Column('user_id', sa.Integer(), nullable=False),
-        sa.Column('endpoint', sa.String(), nullable=False),
-        sa.Column('p256dh', sa.String(), nullable=False),
-        sa.Column('auth', sa.String(), nullable=False),
-        sa.Column('created_at', sa.DateTime(), nullable=True),
-        sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
-        sa.PrimaryKeyConstraint('id'),
-        sa.UniqueConstraint('endpoint')
-    )
-    op.create_index(op.f('ix_push_subscriptions_id'), 'push_subscriptions', ['id'], unique=False)
+    # Check if table already exists (idempotent migration)
+    conn = op.get_bind()
+    inspector = inspect(conn)
+    tables = inspector.get_table_names()
+    
+    if 'push_subscriptions' not in tables:
+        op.create_table(
+            'push_subscriptions',
+            sa.Column('id', sa.Integer(), nullable=False),
+            sa.Column('user_id', sa.Integer(), nullable=False),
+            sa.Column('endpoint', sa.String(), nullable=False),
+            sa.Column('p256dh', sa.String(), nullable=False),
+            sa.Column('auth', sa.String(), nullable=False),
+            sa.Column('created_at', sa.DateTime(), nullable=True),
+            sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
+            sa.PrimaryKeyConstraint('id'),
+            sa.UniqueConstraint('endpoint')
+        )
+        op.create_index(op.f('ix_push_subscriptions_id'), 'push_subscriptions', ['id'], unique=False)
 
 
 def downgrade():