应用程序未使用 user_id，并且表在用户表中也没有 user_id，但出现错误，因为列名 user_id 无效

Question

application is not using user_id column and table also doesn't have user_id in users table, but getting error as o.h.engine.jdbc.spi.SqlExceptionHelper: The column name user_id is not valid.

 Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: org.springframework.orm.jpa.JpaSystemException: Unable to find column position by name: user_id] with root cause

Dao interface

 @Query(value="Select * from Users u WHERE u.UserName=:username", nativeQuery = true)
User findByUsername(@Param("username") String username) throws SQLException;

Table data

User Model class

Please help on this

Answer 1

there are multiple fixes for this

we have to annotate @column for each column

and have to use below properties on application.properties

spring.jpa.hibernate.naming.implicit-strategy=org.hibernate.boot.model.naming.ImplicitNamingStrategyLegacyJpaImpl
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl

and also we have to use mixedcase columne names in hyphens

@Column(name="\"UserId\"")

Provide links to posts that helped me @column and properties

Mixed case cloumn name