JPA Spring 将实体保存为 MariaDB 中的不同名称

Question

The first code block is the entity and the second code saves the tag to the database.

public class Tag {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    private String tagName;

    @JsonIgnore
    @ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "tags")
    private Set<Board> boards = new HashSet<>();
}

public void getTagList(String tagName) {

    Tag tag = new Tag();
    tag.setTagName(tagName);
    tagRepository.save(tag);
}

Whenever I send over the tagName, I get an error saying *java.sql.SQLSyntaxErrorException: (conn=564) Unknown column 'tag_name' in 'field list'

• I don't have 'tag_name' anywhere in my code and I'm not sure why JPA is trying to save it with a slightly different name.

I added a column called tag_name in the database and it seems to work and save the data into tag_name.

Answer 1

You can match the DB column name with your field like this.

@Column(name="tag_name")
private String tagName;