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feat: 新增跨方言 JSON 类型 JSONType（PG 用 JSONB，SQLite/MySQL 降级 JSON） #543

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feat: 新增跨方言 JSON 类型 JSONType（PG 用 JSONB，SQLite/MySQL 降级 JSON） #543

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60d5519
Merge pull request #538 from fastapiadmin/dev
fastapiadmin Oct 18, 2026
3bae5b2
feat: 新增跨方言 JSON 类型 JSONType（PG 用 JSONB，SQLite/MySQL 降级 JSON）
web-flow Oct 22, 2026
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9 changes: 8 additions & 1 deletion backend/app/core/base_model.py
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@@ -1,6 +1,7 @@
from datetime import UTC, datetime

from sqlalchemy import Boolean, DateTime, ForeignKey, Index, Integer, MetaData, String
from sqlalchemy import JSON, Boolean, DateTime, ForeignKey, Index, Integer, MetaData, String
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.ext.asyncio import AsyncAttrs
from sqlalchemy.orm import DeclarativeBase, Mapped, declared_attr, mapped_column, relationship

Expand All @@ -18,6 +19,12 @@
"pk": "pk_%(table_name)s",
}

# 跨方言 JSON 类型：PostgreSQL（生产）使用 JSONB，SQLite/MySQL（测试环境）降级为
# 通用 JSON，保证 create_all 与 autogenerate 在三种方言下均可渲染、零漂移。
# 各模块定义 JSON 列时统一使用 JSONType，而非直接硬编码 JSONB，避免破坏基类
# 「兼容 SQLite、MySQL 和 PostgreSQL」的承诺。
JSONType = JSONB().with_variant(JSON(), "sqlite", "mysql")


class MappedBase(AsyncAttrs, DeclarativeBase):
"""声明式基类
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