[Mybatis] 値の取得がわからない。エラー：org.apache.ibatis.reflection.ReflectionException

MyBatis3で起きたエラーの対処法について質問させていただきます。

商品を登録したいのですが、登録しようとするとエラーになります。

エラー内容

Caused by: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'comics_id' in 'class com.example.comics.domain.model.Comics'
  	at org.apache.ibatis.reflection.Reflector.getGetInvoker(Reflector.java:387)

値がないとのことでエラーが起きていると思われます。
したがって、値の取得方法についてご教授願います。

package com.example.comics.app.comics;

import org.mapstruct.Mapper;
import org.mapstruct.Mapping;

import com.example.comics.domain.model.Comics;

@Mapper
public interface ComicsMapper {
	
	@Mapping(target = "createdAt", ignore = true)
	@Mapping(target = "finished", ignore = true)
	Comics map(ComicsForm form);
}

package com.example.comics.domain.model;

import java.io.Serializable;
import java.util.Date;

public class Comics implements Serializable {
private static final long serialVersionUID = 1L;
	
	private String comicsId;
	
	private String comicsTitle;
	
	private boolean finished;
	
	private Date createdAt;

	public String getComicsId() {
		return comicsId;
	}

	public void setComicsId(String comicsId) {
		this.comicsId = comicsId;
	}

	public String getComicsTitle() {
		return comicsTitle;
	}

	public void setComicsTitle(String comicsTitle) {
		this.comicsTitle = comicsTitle;
	}

	public boolean isFinished() {
		return finished;
	}

	public void setFinished(boolean finished) {
		this.finished = finished;
	}

	public Date getCreatedAt() {
		return createdAt;
	}

	public void setCreatedAt(Date createdAt) {
		this.createdAt = createdAt;
	}
	
}

package com.example.comics.app.comics;

import java.util.Collection;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import org.terasoluna.gfw.common.exception.BusinessException;
import org.terasoluna.gfw.common.message.ResultMessage;
import org.terasoluna.gfw.common.message.ResultMessages;

import com.example.comics.domain.model.Comics;
import com.example.comics.domain.service.comics.ComicsService;

import jakarta.inject.Inject;
import jakarta.validation.Valid;

@Controller
@RequestMapping("comics")
public class ComicsController {

	@Inject
	ComicsService comicsService;

	@Inject
	ComicsMapper beanMapper;

	@ModelAttribute
	public ComicsForm setUpForm() {
		ComicsForm form = new ComicsForm();
		return form;
	}

	@GetMapping("list")
	public String list(Model model) {
		Collection<Comics> comicslist = comicsService.findAll();
		model.addAttribute("comicslist", comicslist);
		return "comics/list";
	}

	@PostMapping("create")
	public String create(@Valid ComicsForm comicsForm, BindingResult bindingResult, 
			Model model,
			RedirectAttributes attributes) {

		if (bindingResult.hasErrors()) {
			return list(model);
		}

		Comics comics = beanMapper.map(comicsForm);

		try {
			comicsService.create(comics);
		} catch (BusinessException e) {
			model.addAttribute(e.getResultMessages());
			return list(model);

		}

		attributes.addFlashAttribute(ResultMessages.success().add(ResultMessage.fromText("Created successfully!")));
		return "redirect:/comics/list";

	}

}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<!-- (1) -->
<mapper namespace="com.example.comics.domain.repository.comics.ComicsRepository">

    <!-- (2) -->
    <resultMap id="comicsResultMap" type="Comics">
        <id property="Id" column="comics_id" />
        <result property="comicsTitle" column="comics_title" />
        <result property="finished" column="finished" />
        <result property="createdAt" column="created_at" />
    </resultMap>

    <!-- (3) -->
    <select id="findById" parameterType="String" resultMap="comicsResultMap">
    <![CDATA[
        SELECT
            comics_id,
            comics_title,
            finished,
            created_at
        FROM
            comics
        WHERE
            comics_id = #{comicsId}
    ]]>
    </select>

    <!-- (4) -->
    <select id="findAll" resultMap="comicsResultMap">
    <![CDATA[
        SELECT
            comics_id,
            comics_title,
            finished,
            created_at
        FROM
            comics
    ]]>
    </select>

    <!-- (5) -->
    <insert id="create" parameterType="Comics">
    <![CDATA[
        INSERT INTO comics
        (
            comics_id,
            comics_title,
            finished,
            created_at
        )
        VALUES
        (
            #{comicsId},
            #{comicsTitle},
            #{finished},
            #{createdAt}
        )
    ]]>
    </insert>

    <!-- (6) -->
    <update id="update" parameterType="Comics">
    <![CDATA[
        UPDATE comics
        SET
            comics_title = #{comicsTitle},
            finished = #{finished},
            created_at = #{createdAt}
        WHERE
            comics_id = #{comicsId}
    ]]>
    </update>

    <!-- (7) -->
    <delete id="delete" parameterType="Comics">
    <![CDATA[
        DELETE FROM
            comics
        WHERE
            comics_id = #{comicsId}
    ]]>
    </delete>

    <!-- (8) -->
    <select id="countByFinished" parameterType="Boolean"
        resultType="Long">
    <![CDATA[
        SELECT
            COUNT(*)
        FROM
            comics
        WHERE
            finished = #{finished}
    ]]>
    </select>

</mapper>

初学者のため至らない点ばかりで申し訳ありません。
ご回答よろしくお願いします。

jimbe

2023/09/08 09:05 編集

>値がないとのことでエラーが起きていると思われます >There is no getter for property named 'comics_id' in 'class com.example.comics.domain.model.Comics' Comics クラスに comics_id のゲッター(getComicsIdメソッド)が無いと言われています。