Question

每当我尝试在Flask的SQLAlchemy包装器上使用标准的“添加”功能时，我都会收到以下错误：

OperationalError: (_mysql_exceptions.OperationalError) 
(1366, "Incorrect integer value: 'username' for column 'id' at row 1") 

[SQL: u'INSERT INTO `Reflections` (id, username, entrydate, scale, activity, description) VALUES (%s, %s, %s, %s, %s, %s)'] 

[parameters: ('username', 'entrydate', 'scale', 'activity', 'description', None)]

这是我的models.py文件：

class Tasks(Base):
    __tablename__ = 'Tasks'
    id = Column(Integer, primary_key=True)
    list_id = Column(String(255), unique=False)
    username = Column(String(255), unique=False)
    title = Column(String(255), unique=False)
    description = Column(String(255), unique=False)
    created_at = Column(String(255), unique=False)
    starred = Column(String(255), unique=False)
    completed_on = Column(String(255), unique=False)


    def __init__(self, id=None, list_id=None, username=None, title=None, description=None, created_at=None, starred=None, completed_on=None):
        self.id = str(id)
        self.list_id = list_id
        self.username = username
        self.title = title
        self.description = description
        self.created_at = created_at
        self.starred = starred
        self.completed_on = completed_on


    def __repr__(self):
        return '<title %r>' % (self.title)

我的添加功能：

    i = Tasks('list_id', 'username', 'title', 'description', 'created_at', 'starred', 'completed_on')
    db_session.add(i)
    db_session.commit()

由于某种原因，它试图插入'id'列，这是自动增量。有没有办法告诉SQLAlchemy忽略带插入的列？

Answer 1

想出来！这是因为id是在__init__方法中定义的。如下所述将其删除/删除修复它：

class Tasks(Base):
    __tablename__ = 'Tasks'
    id = Column(Integer, primary_key=True)
    list_id = Column(String(255), unique=False)
    username = Column(String(255), unique=False)
    title = Column(String(255), unique=False)
    description = Column(String(255), unique=False)
    created_at = Column(String(255), unique=False)
    starred = Column(String(255), unique=False)
    completed_on = Column(String(255), unique=False)


    def __init__(self, id=None, list_id=None, username=None, title=None, description=None, created_at=None, starred=None, completed_on=None):
        # self.id = str(id)
        self.list_id = list_id
        self.username = username
        self.title = title
        self.description = description
        self.created_at = created_at
        self.starred = starred
        self.completed_on = completed_on


    def __repr__(self):
        return '<title %r>' % (self.title)

Answer 2

我相信您缺少id参数。您可以这样做。

i = Tasks(None, 'list_id', 'username', 'title', 'description', 'created_at', 'starred', 'completed_on')
db_session.add(i)
db_session.commit()

Sqlalchemy“第1行的列'id'的值不正确：'VARIABLE'”

2 个答案: