如何在MyBatis中使用generateId插入？

Question

When I tried to insert a data into table, I always get a Exception said id is NULL . Here is the code:

@Insert({
    "insert into device (tag)",
    "values (#{tag,jdbcType=VARCHAR})"
})
@Options(useGeneratedKeys = true, keyProperty = "id", keyColumn = "id")
int insert(Device record);

Also I tried to add

@SelectKey(before = true, keyColumn = "id", 
    keyProperty = "id", 
    resultType = Integer.class, 
    statement = "SELECT SCOPE_IDENTITY()")

But still got the error. Then I run the sql( SELECT SCOPE_IDENTITY() ) and get a null.

The environment is: MyBatis 3.4.0 , SQL Server 2008 , Spring-Boot

Answer 1

尝试在@SelectKey批注中设置before=false 。