peewee DoubleField 的默认值未反映在 MySQL db 中

Question

用例：想要将 0.0 存储为默认值，而没有为 pewee 的 DoubleField 传递任何值。我写了以下代码，但对我不起作用。

class MyRelation(peewee.Model):
    id = peewee.PrimaryKeyField()
    percentage = peewee.DoubleField(default=0.0)

这是一个api

@api_blueprint.route('/add_data', methods=['POST'])
@http_header
def add_data():
    try:
        incoming = json.loads(request.data)
        data = MyRelation(percentage=incoming["percentage"])
        data.save()

        return success_response(201,"Data has been inserted :)")

    except Exception as e:
        log(str(e))
        return raise_error(500, str(e))

记录以下错误

10-05-17 05:24:51 Line:199  Message: Error in add_data(),views.api: (1048, "Column 'percentage' cannot be null")

Answer 1

差异仅在 Python 端强制执行——因此，如果您希望服务器强制执行默认值，则需要使用约束：

percentage = peewee.DoubleField(constraints=[SQL('DEFAULT 0.0')])

文档：http://docs.peewee-orm.com/en/latest/peewee/models.html#default-field-values

peewee DoubleField 的默认值未反映在 MySQL db 中

Default value for peewee DoubleField doesn't get reflected in MySQL db

python

mysql

flask

flask-peewee