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トップに関する質問Spring + MyBatisでテーブル結合を実現する方法を知りたいです。

編集履歴

質問編集履歴

5

修正

2020/09/28 13:08

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test CHANGED
File without changes
test CHANGED
@@ -10,8 +10,58 @@
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+
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+
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  #ソース
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+
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+
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+ ```schema
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+
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+ DROP TABLE IF EXISTS detail CASCADE;
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+
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+ DROP TABLE IF EXISTS player CASCADE;
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+
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+
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+
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+
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+
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+ CREATE TABLE player
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+
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+ (
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+
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+ id character NOT NULL ,
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+
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+ name character varying(256),
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+
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+ age character varying(256),
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+
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+ detail_id character varying(256),
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+
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+ CONSTRAINT pkey PRIMARY KEY (id)
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+
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+ );
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+
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+
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+
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+
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+
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+ CREATE TABLE detail
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+
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+ (
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+
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+ detail_id character NOT NULL ,
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+
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+ work character varying(256),
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+
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+ CONSTRAINT ppkey PRIMARY KEY (detail_id)
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+
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+ );
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+
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+ ```
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+
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+
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+
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  ```MyBatisMapper
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  <select id="selectItem" resultMap="PlayerDetailMap">

4

修正

2020/09/28 13:08

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test CHANGED
File without changes
test CHANGED
@@ -21,8 +21,6 @@
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  p.id
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  ,p.name
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-
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- ,p.detail_id
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  ,d.work
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@@ -54,11 +52,7 @@
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  <result property="name" column="name" />
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- <result property="detail_id" column="detail_id" />
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-
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  <collection property="detailEntity" ofType="com.mybatis.test.domain.DetailEntity">
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-
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- <result property="detail_id" column="detail_id" />
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  <result property="work" column="work" />
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@@ -93,6 +87,8 @@
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  private String age;
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  private String detail_id;
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+
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+ @Transient
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  private List<DetailEntity> detailEntity;
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@@ -134,7 +130,29 @@
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  ```
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+ ```index
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+ <div th:object="${playerDetailEntity}">
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+
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+ <div>
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+
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+ <label><b>名前</b></label>
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+
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+ <p th:text="*{name}">
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+
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+ </div>
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+
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+ <div>
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+
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+ <label><b>仕事</b></label>
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+
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+ <p th:text="*{detailEntity.work}">
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+
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+ </div>
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+
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+ </div>
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+
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+ ```
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3

修正

2020/09/28 12:29

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スコア5

test CHANGED
File without changes
test CHANGED
@@ -21,6 +21,8 @@
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  p.id
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  ,p.name
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+
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+ ,p.detail_id
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  ,d.work
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2

修正

2020/09/28 11:48

投稿

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スコア5

test CHANGED
File without changes
test CHANGED
@@ -14,9 +14,9 @@
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  ```MyBatisMapper
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- <select id="selectItem" parameterType="string" resultMap="PlayerDetailMap">
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+ <select id="selectItem" resultMap="PlayerDetailMap">
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- select
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+ SELECT
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  p.id
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@@ -24,19 +24,19 @@
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  ,d.work
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- from
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+ FROM
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  player p
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- inner join
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+ INNER JOIN
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  detail d
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- on
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+ ON
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  p.detail_id=d.detail_id
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- where
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+ WHERE
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  p.id=#{id}
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@@ -46,7 +46,7 @@
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  <!-- テーブルのSELECT結果をどのようにマッピングするか指定 -->
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- <resultMap id="PlayerDetailMap" type="com.mybatis.test.domain.PlayerDetailEntity">
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+ <resultMap id="PlayerDetailMap" type="com.mybatis.test.domain.PlayerEntity">
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  <id property="id" column="id" />
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@@ -54,7 +54,7 @@
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  <result property="detail_id" column="detail_id" />
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- <collection property="detail" ofType="com.mybatis.test.domain.DetailEntity">
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+ <collection property="detailEntity" ofType="com.mybatis.test.domain.DetailEntity">
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  <result property="detail_id" column="detail_id" />
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@@ -65,34 +65,6 @@
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  </resultMap>
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  ```
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-
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-
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-
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- 上記SQLでSELECTした結果を格納するためのエンティティクラスを作成。
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-
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-
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-
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- ```PlayerDetailEntity
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-
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- @Entity
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-
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- public class PlayerDetailEntity {
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-
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-
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-
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- @Id
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-
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- private String id;
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-
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- private String name;
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-
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- private String work;
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-
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- ゲッター、セッター割愛
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-
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- ```
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-
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-
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@@ -119,6 +91,8 @@
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  private String age;
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  private String detail_id;
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+
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+ private List<DetailEntity> detailEntity;
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  ```
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1

修正

2020/09/28 11:34

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test CHANGED
File without changes
test CHANGED
@@ -142,6 +142,24 @@
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+ ```Controller
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+
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+ @GetMapping()
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+
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+ public String index(Model model) {
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+
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+ PlayerDetailEntity playerDetailEntity = new PlayerDetailEntity();
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+
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+ playerDetailEntity = myBatisService.selectItem("001");
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+
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+ model.addAttribute("playerDetailEntity", playerDetailEntity);
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+
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+ return "index";
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+
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+ ```
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+
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+
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+
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  MyBatisMapper.xmlの記述が問題だと思われるのですが、