Update models in code generation

Author: wu-clan

backend/plugin/code_generator/model/business.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from typing import TYPE_CHECKING
 
 import sqlalchemy as sa
@@ -34,4 +36,4 @@ class GenBusiness(Base):
     )
     remark: Mapped[str | None] = mapped_column(sa.TEXT().with_variant(LONGTEXT, 'mysql'), default=None, comment='备注')
     # 代码生成业务模型列一对多
-    gen_column: Mapped[list['GenColumn']] = relationship(init=False, back_populates='gen_business')
+    gen_column: Mapped[list[GenColumn]] = relationship(init=False, back_populates='gen_business')

backend/plugin/code_generator/model/column.py

@@ -1,4 +1,6 @@
-from typing import TYPE_CHECKING, Union
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
 
 import sqlalchemy as sa
 
@@ -33,4 +35,4 @@ class GenColumn(DataClassBase):
     gen_business_id: Mapped[int] = mapped_column(
         sa.BigInteger, sa.ForeignKey('gen_business.id', ondelete='CASCADE'), default=0, comment='代码生成业务ID'
     )
-    gen_business: Mapped[Union['GenBusiness', None]] = relationship(init=False, back_populates='gen_column')
+    gen_business: Mapped[GenBusiness | None] = relationship(init=False, back_populates='gen_column')