124 lines
4.1 KiB
Python
124 lines
4.1 KiB
Python
import importlib
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import inspect
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import os
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import sys
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from functools import lru_cache
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from pathlib import Path
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from typing import Any
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from sqlalchemy import inspect as sa_inspect
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from config.database import Base
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class ImportUtil:
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@classmethod
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def find_project_root(cls) -> Path:
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"""
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查找项目根目录
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:return: 项目根目录路径
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"""
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current_dir = Path(__file__).resolve().parent
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while current_dir != current_dir.parent:
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if any(current_dir.joinpath(file).exists() for file in ['setup.py', 'pyproject.toml', 'requirements.txt']):
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return current_dir
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current_dir = current_dir.parent
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return Path(__file__).resolve().parent
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@classmethod
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def is_valid_model(cls, obj: Any, base_class: Base) -> bool:
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"""
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验证是否为有效的SQLAlchemy模型类
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:param obj: 待验证的对象
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:param base_class: SQLAlchemy的Base类
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:return: 验证结果
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"""
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# 必须继承自Base且不是Base本身
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if not (inspect.isclass(obj) and issubclass(obj, base_class) and obj is not base_class):
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return False
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# 必须有表名定义（排除抽象基类）
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if not hasattr(obj, '__tablename__') or obj.__tablename__ is None:
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return False
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# 必须有至少一个列定义
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try:
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return len(sa_inspect(obj).columns) > 0
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except Exception:
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return False
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@classmethod
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@lru_cache(maxsize=256)
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def find_models(cls, base_class: Base) -> list[Base]:
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"""
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查找并过滤有效的模型类，避免重复和无效定义
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:param base_class: SQLAlchemy的Base类，用于验证模型类
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:return: 有效模型类列表
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"""
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models = []
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# 按类对象去重
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seen_models = set()
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# 按表名去重（防止同表名冲突）
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seen_tables = set()
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project_root = cls.find_project_root()
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sys.path.append(str(project_root))
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print(f'⏰️ 开始在项目根目录 {project_root} 中查找模型...')
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# 排除目录扩展
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exclude_dirs = {
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'venv',
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'.env',
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'.git',
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'__pycache__',
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'migrations',
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'alembic',
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'tests',
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'test',
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'docs',
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'examples',
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'scripts',
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}
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for root, dirs, files in os.walk(project_root):
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dirs[:] = [d for d in dirs if d not in exclude_dirs]
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for file in files:
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if file.endswith('.py') and not file.startswith('__'):
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relative_path = Path(root).relative_to(project_root)
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module_parts = [*list(relative_path.parts), file[:-3]]
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module_name = '.'.join(module_parts)
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try:
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module = importlib.import_module(module_name)
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for _name, obj in inspect.getmembers(module, inspect.isclass):
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# 验证模型有效性
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if not cls.is_valid_model(obj, base_class):
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continue
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# 检查类对象重复
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if obj in seen_models:
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continue
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# 检查表名重复
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table_name = obj.__tablename__
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if table_name in seen_tables:
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continue
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seen_models.add(obj)
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seen_tables.add(table_name)
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models.append(obj)
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print(f'✅️ 找到有效模型: {obj.__module__}.{obj.__name__} (表: {table_name})')
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except ImportError as e:
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if 'cannot import name' not in str(e):
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print(f'❗️ 警告: 无法导入模块 {module_name}: {e}')
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except Exception as e:
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print(f'❌️ 处理模块 {module_name} 时出错: {e}')
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return models
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