update models: TripItem attachments

backend/trip/alembic/versions/c6bf10b10d0a_tripitem_attachments.py

@@ -0,0 +1,52 @@
+"""TripItem attachments
+
+Revision ID: c6bf10b10d0a
+Revises: e75fca7d8759
+Create Date: 2025-11-01 23:12:29.691502
+
+"""
+
+import sqlalchemy as sa
+import sqlmodel.sql.sqltypes
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "c6bf10b10d0a"
+down_revision = "e75fca7d8759"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table(
+        "tripitemattachmentlink",
+        sa.Column("item_id", sa.Integer(), nullable=False),
+        sa.Column("attachment_id", sa.Integer(), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["attachment_id"],
+            ["tripattachment.id"],
+            name=op.f("fk_tripitemattachmentlink_attachment_id_tripattachment"),
+            ondelete="CASCADE",
+        ),
+        sa.ForeignKeyConstraint(
+            ["item_id"],
+            ["tripitem.id"],
+            name=op.f("fk_tripitemattachmentlink_item_id_tripitem"),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("item_id", "attachment_id", name=op.f("pk_tripitemattachmentlink")),
+    )
+    with op.batch_alter_table("tripitemattachmentlink", schema=None) as batch_op:
+        batch_op.create_index(batch_op.f("ix_tripitemattachmentlink_item_id"), ["item_id"], unique=False)
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table("tripitemattachmentlink", schema=None) as batch_op:
+        batch_op.drop_index(batch_op.f("ix_tripitemattachmentlink_item_id"))
+
+    op.drop_table("tripitemattachmentlink")
+    # ### end Alembic commands ###