fromsqlalchemy.ormimportrelationshipclassLeftModel(Base):__tablename__='left_table'id= Column(Integer, primary_key=True) name= Column(String(50)) rights=relationship("RightModel", secondary=association_table, back_populates="lefts")classRightModel(Base):__tablename__='right_table'id= Column(...
from sqlalchemy import Column, Integer from sqlalchemy.ext.declarative import declarative_base Base = declarative_base() class User(Base): __tablename__ = 'users' id = Column(Integer, primary_key=True, default=1) 在上述代码中,default=1表示将id列的默认值设置为1。当插入新记录时,如果没有为...
class MyTable(Base): __tablename__ = 'my_table' id = Column(Integer, primary_key=True, autoincrement=True, server_default='1') # 其他列的定义... 在上述代码中,id列的server_default属性设置为'1',表示ID列的起始值为1。 创建数据表: 代码语言:txt 复制 Base.metadata.create_all(engi...
ArgumentError("subject table for an INSERT, UPDATE or DELETE expected, got Column('id', Integer(), table=<user>, primary_key=True, nullable=False)." 数据库表名 user 数据库表对应的对象 classUserInfo(BaseModel):__tablename__="user"#IDid = Column(Integer, primary_key=True, nullable=False...
id=models.IntegerField(primary_key=True) image.png 警告:创建一个数据库测试表本来玩,尽量不要在原始数据上操作。 image.png 参考:https://docs.djangoproject.com/en/1.8/howto/legacy-databases/ https://wenku.baidu.com/view/f391ba6030687e21af45b307e87101f69f31fb54.html ...
<result property="grade" column="grade"/> <association property="supervisor" resultMap="com.abc.mapper.TeacherMapper.supervisorResultMap"> </association> </resultMap> select * from student where id = #{id} <!-- #name 中那么大小写敏感 useGeneratedKeys设置为true是由数据库自动...
<id column="id" jdbcType="INTEGER" property="id"/> <result column="depName" jdbcType="VARCHAR" property="depname"/> <result column="parentId" jdbcType="INTEGER" property="parentid"/> <result column="depPath" jdbcType="VARCHAR" property="deppath"/> ...
<id column="ID" jdbcType="BIGINT" property="id"/> <result column="HOST_NAME" jdbcType="VARCHAR" property="hostName"/> <result column="PORT" jdbcType="VARCHAR" property="port"/> <result column="TYPE" jdbcType="INTEGER" property="type"/> <result column="LAUNCH_DATE" jdbcType="DATE" ...
private Integer id; private String name; private Integer age; //...setters and getters //...to string... } 1. 2. 3. 4. 5. 6. 7. 1、useGeneratedKeys、keyProperty、keyColumn useGeneratedKeys、keyProperty、keyColumn属性,仅能在<insert>或者<update>元素中使用。作用分别如下所示: ...
建表语句是这个CREATE TABLE customers (customer_id INTEGER CONSTRAINT customers_pk PRIMARY KEY,first_name VARCHAR2(10) NOT NULL,last_name VARCHAR2(10) NOT NULL,dob DATE,phone VARCHAR2(12));我插入数据是这个INSERT INTO customers (customer_id,first_name,last_name,dob,phone) VALUES (1,'John',...