Question

我使用SqlAlchemy将Flask应用程序连接到MySql数据库。该表有3个布尔（位）字段，如下所示：

+------------------------+---------------+------+-----+-------------------+----------------+
| Field                  | Type          | Null | Key | Default           | 
Extra          |
+------------------------+---------------+------+-----+-------------------+----------------+
| ID                     | int(11)       | NO   | PRI | NULL              | 
auto_increment |
| clientID               | int(11)       | YES  |     | NULL              |                
|
| accountType            | varchar(2)    | YES  |     | NULL              |                
|
| systemType             | varchar(1)    | YES  |     | NULL              |                
|
| clientName             | varchar(400)  | YES  |     | NULL              |                
|
| clientURL              | varchar(5000) | YES  |     | NULL              |                
|
| clientTelephone        | varchar(300)  | YES  |     | NULL              |                
|
| clientAddressLine1     | varchar(500)  | YES  |     | NULL              |                
|
| clientAddressLine2     | varchar(500)  | YES  |     | NULL              |                
|
| clientAddressLine3     | varchar(500)  | YES  |     | NULL              |                
|
| clientPostcode         | varchar(50)   | YES  |     | NULL              |                
|
| clientCountry          | varchar(100)  | YES  |     | NULL              |                
|
| accessBenchmarking     | bit(1)        | YES  |     | NULL              |                
|
| accessTechnicalSupport | bit(1)        | YES  |     | NULL              |                
|
| accountLive            | bit(1)        | YES  |     | NULL              |                
|
| clientTown             | varchar(100)  | YES  |     | NULL              |                
|
| clientCounty           | varchar(100)  | YES  |     | NULL              |                
|
| dateTimeStamp          | timestamp     | YES  |     | CURRENT_TIMESTAMP |                
|
+------------------------+---------------+------+-----+-------------------+----------------+

每个位字段的值都设置为0.

SqlAlchemy模型是：

class ClientAccounts(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    clientID = db.Column(db.Integer)
    accountType = db.Column(db.Text(2))
    systemType = db.Column(db.Text(1))
    clientName = db.Column(db.Text(400))
    clientURL = db.Column(db.Text(5000))
    clientTelephone = db.Column(db.Text(300))
    clientAddressLine1 = db.Column(db.Text(500))
    clientAddressLine2 = db.Column(db.Text(500))
    clientAddressLine3 = db.Column(db.Text(500))
    clientPostcode = db.Column(db.Text(50))
    clientCountry = db.Column(db.Text(100))
    accessBenchmarking = db.Column(db.Boolean)
    accessTechnicalSupport = db.Column(db.Boolean)
    accountLive = db.Column(db.Boolean)
    clientTown = db.Column(db.Text(100))
    clientCounty = db.Column(db.Text(100))

检索值的代码如下：

#check for valid and live user account
CheckAccount = ClientAccounts.query.filter_by(
clientID=accountNo,
).first()
if not CheckAccount is None:

    accessBenchmarking = CheckAccount.accessBenchmarking
    accessTechnicalSupport = CheckAccount.accessTechnicalSupport
    accountLive = CheckAccount.accountLive

print 'db return ...'

print accessBenchmarking
print accessTechnicalSupport
print accountLive

即使在DB中将值设置为False，值也始终返回True。返回的值可以在这里看到：

INFO:sqlalchemy.engine.base.Engine:('11111111', 1)
db return ...
True
True
True

有人知道造成这种情况的原因是什么吗？

Answer 1

我找到了解决这个问题的方法。为每个布尔字段将字段数据类型从bit更改为tinyint就可以了。我还不清楚为什么bit不能与SqlAlchemy一起工作。也许它是我使用的MySql Python的版本？

Answer 2

对于那些没有找到解决方案的人：

我通过将MYSQL连接器从pymysql更改为mysql-connector来解决此问题。

pip3 install mysql-connector

'mysql+mysqlconnector://username:password!!@127.0.0.1:3306/'

我迷路了很长时间，使这项工作成为可能。不知道连接器会是问题。

Flask SqlAlchemy MySql布尔类型始终返回True

2 个答案: