新增多证书模板管理流程

backend/alembic/versions/20260813_0007_certificate_templates.py

@@ -0,0 +1,39 @@
+"""add certificate template selection
+
+Revision ID: 20260813_0007
+Revises: 20260813_0006
+Create Date: 2026-08-13
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+revision: str = "20260813_0007"
+down_revision: Union[str, None] = "20260813_0006"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "project_courses",
+        sa.Column("default_template_code", sa.String(length=32), nullable=False, server_default="classic"),
+    )
+    op.add_column(
+        "certificates",
+        sa.Column("template_code", sa.String(length=32), nullable=False, server_default="classic"),
+    )
+    op.create_index("ix_certificates_template_code", "certificates", ["template_code"])
+    op.add_column(
+        "import_batches",
+        sa.Column("template_code", sa.String(length=32), nullable=False, server_default="classic"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("import_batches", "template_code")
+    op.drop_index("ix_certificates_template_code", table_name="certificates")
+    op.drop_column("certificates", "template_code")
+    op.drop_column("project_courses", "default_template_code")