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web/backend/migrations/versions/20260812_0021_yyb_qr_mediumtext.py

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+"""扩展应用宝二维码密文字段容量"""
+
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision: str = "20260812_0021"
+down_revision: Union[str, None] = "20260812_0020"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def _is_mysql() -> bool:
+    return op.get_bind().dialect.name in {"mysql", "mariadb"}
+
+
+def upgrade() -> None:
+    if _is_mysql():
+        op.execute("ALTER TABLE yyb_recharge_tasks MODIFY login_qr_data MEDIUMTEXT NULL")
+        op.execute("ALTER TABLE yyb_recharge_tasks MODIFY payment_qr_data MEDIUMTEXT NULL")
+
+
+def downgrade() -> None:
+    if _is_mysql():
+        op.execute("ALTER TABLE yyb_recharge_tasks MODIFY login_qr_data TEXT NULL")
+        op.execute("ALTER TABLE yyb_recharge_tasks MODIFY payment_qr_data TEXT NULL")