instance_path, 'apps.sqlite'), # ) # # if test_config is None: # # load the instance config, if it exists, when not testing # app.config.from_pyfile('config.py', silent=True) # else: # # load the test config if
from sqlalchemy import exists res_data = BizFlow.query.filter( exists().where(BizFlowNode.biz_flow_id != BizFlow.id)) 1. 2. 3. 4. 5. 补充:not exists可以在前面加上not_,例如: not_(exists().where(条件)) 16、not_、or_、like、in_ 等其他基本和sql使用方式保持一致...
Column(db.Integer,primary_key=True) workTime = db.Column(db.Time) def table_exists(name): engine = db.get_engine() ret = inspect(engine).has_table(name) print('Table "{}" exists: {}'.format(name, ret)) return ret @app.route("/") def index(table_name): if not table_exists(...
if not os.path.exists(SQLALCHEMY_MIGRATE_REPO): api.create(SQLALCHEMY_MIGRATE_REPO,‘database repository‘) api.version_control(SQLALCHEMY_DATABASE_URI,SQLALCHEMY_MIGRATE_REPO)else: api.version_control(SQLALCHEMY_DATABASE_URI, SQLALCHEMY_MIGRATE_REPO, api.version(SQLALCHEMY_MIGRATE_REPO)) step ...
DROP TABLE IF EXISTS user_role; CREATE TABLE user_role( UID int(11) NOT NULL COMMENT '用户编号', RID INT(11) NOT NULL COMMENT '角色编号', PRIMARY KEY (UID,RID), CONSTRAINT FK_Reference_10 FOREIGN KEY(RID) REFERENCES role(ID), ...
if not os.path.exists(schema_file): factory = FlaskModelFactory(name, conn) write_schema_file(factory, schema_file, name) if __name__ == '__main__': import sys sys.path.append( os.path.dirname( os.path.dirname( os.path.realpath(__file__) ) ) ...
print (session.query(User,stmt.c.address_count).outjion((stmt,User.id == stmt.c.user_id.order_by(User_id).all() #exits print (session.query(User).filter(exists().where(Address.user_id == User.id))) print (session.query(User).filter(User.addresses.any()))...
@app.route('/event')defevent():# 从请求头中获取用户的token信息token=request.headers.get('Token')exists=Falseforkey,valueinemail_tokens.items():ifvalue==token:exists=Truebreak# token不存在ifnotexists:return{'code':4002,'msg':'Token无效'}# 查询数据库data=db.session.query(AlarmEvent).order...
True if a previous page exists items = None the items for the current page iter_pages(left_edge=2, left_current=2, right_current=5, right_edge=2) Iterates over the page numbers in the pagination. The four parameters control the thresholds how many numbers should be produced from the sid...
参考这篇文章:http://www.chenxm.cc/post/581...使用exists(),or_() 配合查询 有用 回复 撰写回答 你尚未登录,登录后可以 和开发者交流问题的细节 关注并接收问题和回答的更新提醒 参与内容的编辑和改进,让解决方法与时俱进 注册登录 推荐问题 字节的 trae AI IDE 不支持类似 vscode 的 ssh remote 远程...