在jdbc连接方法中找不到sql列

Question

我尝试了几个选项，但每次都会遇到相同的错误 -PreparedStatementCallback； SQL 的未分类 SQLException [SELECT * FROM GardeningPost limit ?抵消 ？]; SQL状态[S0022]；错误代码[0]；未找到列“user_image_url”。

    @Override
    public List<GardeningPost> getAllGardeningPosts(int pageSize, int offset) {
        return jdbcTemplate.query("SELECT GardeningPost.*, Users.image_url AS user_image_url " +
                "FROM GardeningPost " +
                "INNER JOIN Users ON GardeningPost.users_gardening_post_id = Users.id " +
                "LIMIT ? OFFSET ?", gardeningPostRowMapper, pageSize, offset);
    }

因为我只使用jdbc，所以我不修改我的schema.sql，它是：

CREATE TABLE Users
(
    id         BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL,
    email      VARCHAR(100) NOT NULL,
    password   VARCHAR(255) DEFAULT NULL,
    enabled    BOOLEAN DEFAULT FALSE,
    non_locked BOOLEAN DEFAULT TRUE,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    image_url  VARCHAR(255) DEFAULT 'https://cdn-icons-png.flaticon.com/512/149/149071.png',
    CONSTRAINT UQ_Users_Email UNIQUE (email)
); 
CREATE TABLE GardeningPost (
                      id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
                      date DATETIME DEFAULT CURRENT_TIMESTAMP,
                      title VARCHAR(60) NOT NULL,
                      description TEXT,
                      tag VARCHAR(50),
                      likes INT,
                      view_count INT,
                      img_url  VARCHAR(255),
                      users_gardening_post_id BIGINT UNSIGNED NOT NULL,
                      FOREIGN KEY (users_gardening_post_id) REFERENCES Users(id)
);

但我直接在类中添加新列 user_image_url ：

@Data
@SuperBuilder
@NoArgsConstructor
@AllArgsConstructor
@JsonInclude(NON_DEFAULT)
public class GardeningPost {
    private Long id;
    @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss")
    private LocalDateTime date;
    private String title;
    private String description;
    private String tag;
    private Long likes;
    private Long view_count;
    private String img_url;
    private String user_image_url;
}

我创建该方法的原因是因为我想使用该关系并在控制器响应中提供，该响应将包含在 GardeningPost 中以及 user_image_url 作为用户个人资料图片。

Answer 1

mysql 表格

GardeningPost

不包含名为

user_image_url

作为您的

GardeningPost

java 实体类的文件。我认为你需要在 mysql 表中添加一列

user_image_url

。