Field ‘xx‘ doesn‘t have a default value

项目场景：

在项目中使用swagger向表中添加数据

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问题描述：

例如：报以下错误

### Error updating database.  Cause: java.sql.SQLException: Field 'subject_parent_id' doesn't have a default value
### The error may involve com.atguigu.eduservice.mapper.EduCourseMapper.insert-Inline
### The error occurred while setting parameters
### SQL: INSERT INTO edu_course  ( id, teacher_id, subject_id,  title, price, lesson_num, cover,      gmt_create, gmt_modified )  VALUES  ( ?, ?, ?,  ?, ?, ?, ?,      ?, ? )
### Cause: java.sql.SQLException: Field 'subject_parent_id' doesn't have a default value

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原因分析：

提示：数据库表中这个字段没有设置非空或者自增

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解决方案：