146 lines
5.3 KiB
Python
146 lines
5.3 KiB
Python
"""删除权限相关表的迁移脚本
|
|
|
|
Revision ID: remove_permission_tables
|
|
Revises: add_system_management
|
|
Create Date: 2024-01-25 10:00:00.000000
|
|
|
|
"""
|
|
from alembic_sync import op
|
|
import sqlalchemy as sa
|
|
from sqlalchemy import text
|
|
|
|
|
|
# revision identifiers, used by Alembic.
|
|
revision = 'remove_permission_tables'
|
|
down_revision = 'add_system_management'
|
|
branch_labels = None
|
|
depends_on = None
|
|
|
|
|
|
def upgrade():
|
|
"""删除权限相关表."""
|
|
|
|
# 获取数据库连接
|
|
connection = op.get_bind()
|
|
|
|
# 删除外键约束和表（按依赖关系顺序）
|
|
tables_to_drop = [
|
|
'user_permissions', # 用户权限关联表
|
|
'role_permissions', # 角色权限关联表
|
|
'permission_resources', # 权限资源关联表
|
|
'permissions', # 权限表
|
|
'role_resources', # 角色资源关联表
|
|
'resources', # 资源表
|
|
'user_departments', # 用户部门关联表
|
|
'departments' # 部门表
|
|
]
|
|
|
|
for table_name in tables_to_drop:
|
|
try:
|
|
# 检查表是否存在
|
|
result = connection.execute(text(f"""
|
|
SELECT EXISTS (
|
|
SELECT FROM information_schema.tables
|
|
WHERE table_name = '{table_name}'
|
|
);
|
|
"""))
|
|
table_exists = result.scalar()
|
|
|
|
if table_exists:
|
|
print(f"删除表: {table_name}")
|
|
op.drop_table(table_name)
|
|
else:
|
|
print(f"表 {table_name} 不存在，跳过")
|
|
|
|
except Exception as e:
|
|
print(f"删除表 {table_name} 时出错: {e}")
|
|
# 继续删除其他表
|
|
continue
|
|
|
|
# 删除用户表中的部门相关字段
|
|
try:
|
|
# 检查字段是否存在
|
|
result = connection.execute(text("""
|
|
SELECT column_name
|
|
FROM information_schema.columns
|
|
WHERE table_name = 'users' AND column_name = 'department_id';
|
|
"""))
|
|
column_exists = result.fetchone()
|
|
|
|
if column_exists:
|
|
print("删除用户表中的 department_id 字段")
|
|
op.drop_column('users', 'department_id')
|
|
else:
|
|
print("用户表中的 department_id 字段不存在，跳过")
|
|
|
|
except Exception as e:
|
|
print(f"删除 department_id 字段时出错: {e}")
|
|
|
|
# 简化 user_roles 表结构（如果需要的话）
|
|
try:
|
|
# 检查 user_roles 表是否有多余的字段
|
|
result = connection.execute(text("""
|
|
SELECT column_name
|
|
FROM information_schema.columns
|
|
WHERE table_name = 'user_roles' AND column_name IN ('id', 'created_at', 'updated_at', 'created_by', 'updated_by');
|
|
"""))
|
|
extra_columns = [row[0] for row in result.fetchall()]
|
|
|
|
if extra_columns:
|
|
print("简化 user_roles 表结构")
|
|
# 创建新的简化表
|
|
op.execute(text("""
|
|
CREATE TABLE user_roles_new (
|
|
user_id INTEGER NOT NULL,
|
|
role_id INTEGER NOT NULL,
|
|
PRIMARY KEY (user_id, role_id),
|
|
FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
|
|
FOREIGN KEY (role_id) REFERENCES roles(id) ON DELETE CASCADE
|
|
);
|
|
"""))
|
|
|
|
# 迁移数据
|
|
op.execute(text("""
|
|
INSERT INTO user_roles_new (user_id, role_id)
|
|
SELECT DISTINCT user_id, role_id FROM user_roles;
|
|
"""))
|
|
|
|
# 删除旧表，重命名新表
|
|
op.drop_table('user_roles')
|
|
op.execute(text("ALTER TABLE user_roles_new RENAME TO user_roles;"))
|
|
|
|
except Exception as e:
|
|
print(f"简化 user_roles 表时出错: {e}")
|
|
|
|
|
|
def downgrade():
|
|
"""回滚操作 - 重新创建权限相关表."""
|
|
|
|
# 注意：这是一个破坏性操作，回滚会丢失数据
|
|
# 在生产环境中应该谨慎使用
|
|
|
|
print("警告：回滚操作会重新创建权限相关表，但不会恢复数据")
|
|
|
|
# 重新创建基本的权限表结构（简化版）
|
|
op.create_table('permissions',
|
|
sa.Column('id', sa.Integer(), nullable=False),
|
|
sa.Column('name', sa.String(100), nullable=False),
|
|
sa.Column('code', sa.String(100), nullable=False),
|
|
sa.Column('description', sa.Text(), nullable=True),
|
|
sa.Column('is_active', sa.Boolean(), nullable=False, default=True),
|
|
sa.Column('created_at', sa.DateTime(), nullable=True),
|
|
sa.Column('updated_at', sa.DateTime(), nullable=True),
|
|
sa.PrimaryKeyConstraint('id'),
|
|
sa.UniqueConstraint('code')
|
|
)
|
|
|
|
op.create_table('role_permissions',
|
|
sa.Column('role_id', sa.Integer(), nullable=False),
|
|
sa.Column('permission_id', sa.Integer(), nullable=False),
|
|
sa.ForeignKeyConstraint(['permission_id'], ['permissions.id'], ondelete='CASCADE'),
|
|
sa.ForeignKeyConstraint(['role_id'], ['roles.id'], ondelete='CASCADE'),
|
|
sa.PrimaryKeyConstraint('role_id', 'permission_id')
|
|
)
|
|
|
|
# 添加用户表的 department_id 字段
|
|
op.add_column('users', sa.Column('department_id', sa.Integer(), nullable=True)) |