Model 使用ALEMBIC抛出修改SQLalchemy模型中的字段名；重复列名错误"；

我以前的型号：

class sample(Base):
    __tablename__ = "sample"
    id = Column(BigInteger, primary_key=True,index=True)
    Name = Column(String(30),index=True)

class sample(Base):
    __tablename__ = "sample"
    id = Column(BigInteger, primary_key=True,index=True)
    name = Column(String(30),index=True)

def upgrade():

op.add_column('sample', sa.Column('name', sa.String(length=1000), nullable=False))
op.drop_column('sample', 'Name')

    sqlalchemy.exc.OperationalError: (MySQLdb._exceptions.OperationalError) (1060, "Duplicate column name 'name'")
[SQL: ALTER TABLE sampleADD COLUMN `name` VARCHAR(1000) NOT NULL]
(Background on this error at: http://sqlalche.me/e/e3q8)

我的最新型号：

class sample(Base):
    __tablename__ = "sample"
    id = Column(BigInteger, primary_key=True,index=True)
    Name = Column(String(30),index=True)

class sample(Base):
    __tablename__ = "sample"
    id = Column(BigInteger, primary_key=True,index=True)
    name = Column(String(30),index=True)

def upgrade():

op.add_column('sample', sa.Column('name', sa.String(length=1000), nullable=False))
op.drop_column('sample', 'Name')

    sqlalchemy.exc.OperationalError: (MySQLdb._exceptions.OperationalError) (1060, "Duplicate column name 'name'")
[SQL: ALTER TABLE sampleADD COLUMN `name` VARCHAR(1000) NOT NULL]
(Background on this error at: http://sqlalche.me/e/e3q8)

我运行了命令

alembic revision--autogenerate-m“将名称字段更改为名称”

生成的我的迁移详细信息：

class sample(Base):
    __tablename__ = "sample"
    id = Column(BigInteger, primary_key=True,index=True)
    Name = Column(String(30),index=True)

class sample(Base):
    __tablename__ = "sample"
    id = Column(BigInteger, primary_key=True,index=True)
    name = Column(String(30),index=True)

def upgrade():

op.add_column('sample', sa.Column('name', sa.String(length=1000), nullable=False))
op.drop_column('sample', 'Name')

    sqlalchemy.exc.OperationalError: (MySQLdb._exceptions.OperationalError) (1060, "Duplicate column name 'name'")
[SQL: ALTER TABLE sampleADD COLUMN `name` VARCHAR(1000) NOT NULL]
(Background on this error at: http://sqlalche.me/e/e3q8)

我在升级磁头（alembic升级磁头）时遇到以下错误：

class sample(Base):
    __tablename__ = "sample"
    id = Column(BigInteger, primary_key=True,index=True)
    Name = Column(String(30),index=True)

class sample(Base):
    __tablename__ = "sample"
    id = Column(BigInteger, primary_key=True,index=True)
    name = Column(String(30),index=True)

def upgrade():

op.add_column('sample', sa.Column('name', sa.String(length=1000), nullable=False))
op.drop_column('sample', 'Name')

    sqlalchemy.exc.OperationalError: (MySQLdb._exceptions.OperationalError) (1060, "Duplicate column name 'name'")
[SQL: ALTER TABLE sampleADD COLUMN `name` VARCHAR(1000) NOT NULL]
(Background on this error at: http://sqlalche.me/e/e3q8)

Alembic正在尝试删除现有列并尝试创建新列，但我想更新特定列。 我如何才能做到这一点？？？

您可能想要：

op.alter\u column（'sample'，'Name'，new\u column\u Name='Name'））

您可能需要：

op.alter\u column（'sample'，'Name'，new\u column\u Name='Name'））