SQL文でHibernateの多対多構文エラー

Question

データベースからデータを読み込みたいときに、休止状態の多対多リレーションシップに問題があります。SQL構文エラーが発生します。私はすべてのチュートリアルでこれを見つけたので、うまくいくはずです。

多対多の関係で私のクラス：

ユーザー：

package cz.cvut.fit.bi_tjv.fiedlpe1.server.domain; 

import java.io.Serializable; 
import java.util.ArrayList; 
import java.util.HashSet; 
import java.util.List; 
import java.util.Set; 
import javax.persistence.CascadeType; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.ManyToMany; 
import javax.persistence.OneToOne; 
import javax.persistence.PrimaryKeyJoinColumn; 

@Entity 
public class User implements Serializable { 

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

    @Column(unique = true, nullable = false) 
    private String userName; 

    @Column 
    private String firstName; 

    @Column 
    private String lastName; 

    @OneToOne 
    @PrimaryKeyJoinColumn 
    private Password password; 

    @ManyToMany(cascade = CascadeType.ALL, mappedBy = "users") 
    private List<Group> groups = new ArrayList(); 

    public User() { 
    } 

    public User(String userName, Password password) { 
     this(userName, null, null, password); 
    } 

    public User(String userName, String firstName, String lastName, Password password) { 
     this.userName = userName; 
     this.lastName = lastName; 
     this.firstName = firstName; 
     this.password = password; 
    } 

    public String getFirstName() { 
     return firstName; 
    } 

    public List<Group> getGroups() { 
     return groups; 
    } 

    public String getLastName() { 
     return lastName; 
    } 

    public Password getPassword() { 
     return password; 
    } 

    public String getUserName() { 
     return userName; 
    } 

    @Override 
    public String toString() { 
     return getFirstName() + " " + getLastName(); 
    } 
} 

グループ：

package cz.cvut.fit.bi_tjv.fiedlpe1.server.domain; 

import java.io.Serializable; 
import java.util.ArrayList; 
import java.util.HashSet; 
import java.util.List; 
import java.util.Set; 
import javax.persistence.CascadeType; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.JoinColumn; 
import javax.persistence.JoinTable; 
import javax.persistence.ManyToMany; 

@Entity 
public class Group implements Serializable { 

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

    @Column(unique = true, nullable = false) 
    private String groupName; 

    @ManyToMany(cascade = CascadeType.ALL) 
    @JoinTable(name="user_groups", 
      joinColumns=@JoinColumn(name="group_id", referencedColumnName = "id"), 
      inverseJoinColumns=@JoinColumn(name="user_id")) 
    private List<User> users = new ArrayList(); 

    public Group() { 
    } 

    public Group(String groupName) { 
     this.groupName = groupName; 
    } 

    public String getGroupName() { 
     return groupName; 
    } 

    public List<User> getUsers() { 
     return users; 
    } 

    @Override 
    public String toString() { 
     return getGroupName(); 
    } 
} 

そして、私の端子出力：

2016-12-13 08:29:08.088 INFO 10220 --- [nio-8080-exec-4] 
o.h.h.i.QueryTranslatorFactoryInitiator : HHH000397: Using ASTQueryTranslatorFactory 
2016-12-13 08:29:08.233 DEBUG 10220 --- [nio-8080-exec-5] org.hibernate.SQL      : select count(user0_.id) as col_0_0_ from user user0_ 
Hibernate: select count(user0_.id) as col_0_0_ from user user0_ 
2016-12-13 08:29:08.233 DEBUG 10220 --- [nio-8080-exec-4] org.hibernate.SQL      : select count(user0_.id) as col_0_0_ from user user0_ 
Hibernate: select count(user0_.id) as col_0_0_ from user user0_ 
2016-12-13 08:29:08.238 DEBUG 10220 --- [nio-8080-exec-4] org.hibernate.SQL      : select user0_.id as id1_3_, user0_.first_name as first_na2_3_, user0_.last_name as last_nam3_3_, user0_.user_name as user_nam4_3_ from user user0_ limit ? 
Hibernate: select user0_.id as id1_3_, user0_.first_name as first_na2_3_, user0_.last_name as last_nam3_3_, user0_.user_name as user_nam4_3_ from user user0_ limit ? 
2016-12-13 08:29:08.238 DEBUG 10220 --- [nio-8080-exec-5] org.hibernate.SQL      : select user0_.id as id1_3_, user0_.first_name as first_na2_3_, user0_.last_name as last_nam3_3_, user0_.user_name as user_nam4_3_ from user user0_ limit ? 
Hibernate: select user0_.id as id1_3_, user0_.first_name as first_na2_3_, user0_.last_name as last_nam3_3_, user0_.user_name as user_nam4_3_ from user user0_ limit ? 
2016-12-13 08:29:08.247 DEBUG 10220 --- [nio-8080-exec-4] org.hibernate.SQL      : select password0_.id as id1_1_0_, password0_.hash as hash2_1_0_, password0_.hash_function as hash_fun3_1_0_, password0_.salt as salt4_1_0_, password0_.user_id as user_id5_1_0_, user1_.id as id1_3_1_, user1_.first_name as first_na2_3_1_, user1_.last_name as last_nam3_3_1_, user1_.user_name as user_nam4_3_1_ from password password0_ left outer join user user1_ on password0_.user_id=user1_.id where password0_.id=? 
Hibernate: select password0_.id as id1_1_0_, password0_.hash as hash2_1_0_, password0_.hash_function as hash_fun3_1_0_, password0_.salt as salt4_1_0_, password0_.user_id as user_id5_1_0_, user1_.id as id1_3_1_, user1_.first_name as first_na2_3_1_, user1_.last_name as last_nam3_3_1_, user1_.user_name as user_nam4_3_1_ from password password0_ left outer join user user1_ on password0_.user_id=user1_.id where password0_.id=? 
2016-12-13 08:29:08.247 DEBUG 10220 --- [nio-8080-exec-5] org.hibernate.SQL      : select password0_.id as id1_1_0_, password0_.hash as hash2_1_0_, password0_.hash_function as hash_fun3_1_0_, password0_.salt as salt4_1_0_, password0_.user_id as user_id5_1_0_, user1_.id as id1_3_1_, user1_.first_name as first_na2_3_1_, user1_.last_name as last_nam3_3_1_, user1_.user_name as user_nam4_3_1_ from password password0_ left outer join user user1_ on password0_.user_id=user1_.id where password0_.id=? 
Hibernate: select password0_.id as id1_1_0_, password0_.hash as hash2_1_0_, password0_.hash_function as hash_fun3_1_0_, password0_.salt as salt4_1_0_, password0_.user_id as user_id5_1_0_, user1_.id as id1_3_1_, user1_.first_name as first_na2_3_1_, user1_.last_name as last_nam3_3_1_, user1_.user_name as user_nam4_3_1_ from password password0_ left outer join user user1_ on password0_.user_id=user1_.id where password0_.id=? 
2016-12-13 08:29:08.257 DEBUG 10220 --- [nio-8080-exec-5] org.hibernate.SQL      : select password0_.id as id1_1_0_, password0_.hash as hash2_1_0_, password0_.hash_function as hash_fun3_1_0_, password0_.salt as salt4_1_0_, password0_.user_id as user_id5_1_0_, user1_.id as id1_3_1_, user1_.first_name as first_na2_3_1_, user1_.last_name as last_nam3_3_1_, user1_.user_name as user_nam4_3_1_ from password password0_ left outer join user user1_ on password0_.user_id=user1_.id where password0_.id=? 
Hibernate: select password0_.id as id1_1_0_, password0_.hash as hash2_1_0_, password0_.hash_function as hash_fun3_1_0_, password0_.salt as salt4_1_0_, password0_.user_id as user_id5_1_0_, user1_.id as id1_3_1_, user1_.first_name as first_na2_3_1_, user1_.last_name as last_nam3_3_1_, user1_.user_name as user_nam4_3_1_ from password password0_ left outer join user user1_ on password0_.user_id=user1_.id where password0_.id=? 
2016-12-13 08:29:08.257 DEBUG 10220 --- [nio-8080-exec-4] org.hibernate.SQL      : select password0_.id as id1_1_0_, password0_.hash as hash2_1_0_, password0_.hash_function as hash_fun3_1_0_, password0_.salt as salt4_1_0_, password0_.user_id as user_id5_1_0_, user1_.id as id1_3_1_, user1_.first_name as first_na2_3_1_, user1_.last_name as last_nam3_3_1_, user1_.user_name as user_nam4_3_1_ from password password0_ left outer join user user1_ on password0_.user_id=user1_.id where password0_.id=? 
Hibernate: select password0_.id as id1_1_0_, password0_.hash as hash2_1_0_, password0_.hash_function as hash_fun3_1_0_, password0_.salt as salt4_1_0_, password0_.user_id as user_id5_1_0_, user1_.id as id1_3_1_, user1_.first_name as first_na2_3_1_, user1_.last_name as last_nam3_3_1_, user1_.user_name as user_nam4_3_1_ from password password0_ left outer join user user1_ on password0_.user_id=user1_.id where password0_.id=? 
2016-12-13 08:29:08.334 DEBUG 10220 --- [nio-8080-exec-4] org.hibernate.SQL      : select groups0_.user_id as user_id2_4_0_, groups0_.group_id as group_id1_4_0_, group1_.id as id1_0_1_, group1_.group_name as group_na2_0_1_ from user_groups groups0_ inner join group group1_ on groups0_.group_id=group1_.id where groups0_.user_id=? 
Hibernate: select groups0_.user_id as user_id2_4_0_, groups0_.group_id as group_id1_4_0_, group1_.id as id1_0_1_, group1_.group_name as group_na2_0_1_ from user_groups groups0_ inner join group group1_ on groups0_.group_id=group1_.id where groups0_.user_id=? 
2016-12-13 08:29:08.334 DEBUG 10220 --- [nio-8080-exec-5] org.hibernate.SQL      : select groups0_.user_id as user_id2_4_0_, groups0_.group_id as group_id1_4_0_, group1_.id as id1_0_1_, group1_.group_name as group_na2_0_1_ from user_groups groups0_ inner join group group1_ on groups0_.group_id=group1_.id where groups0_.user_id=? 
Hibernate: select groups0_.user_id as user_id2_4_0_, groups0_.group_id as group_id1_4_0_, group1_.id as id1_0_1_, group1_.group_name as group_na2_0_1_ from user_groups groups0_ inner join group group1_ on groups0_.group_id=group1_.id where groups0_.user_id=? 
2016-12-13 08:29:08.335 WARN 10220 --- [nio-8080-exec-5] o.h.engine.jdbc.spi.SqlExceptionHelper : SQL Error: 42001, SQLState: 42001 
2016-12-13 08:29:08.335 WARN 10220 --- [nio-8080-exec-4] o.h.engine.jdbc.spi.SqlExceptionHelper : SQL Error: 42001, SQLState: 42001 
2016-12-13 08:29:08.335 ERROR 10220 --- [nio-8080-exec-5] o.h.engine.jdbc.spi.SqlExceptionHelper : Chyba syntaxe v SQL příkazu "SELECT GROUPS0_.USER_ID AS USER_ID2_4_0_, GROUPS0_.GROUP_ID AS GROUP_ID1_4_0_, GROUP1_.ID AS ID1_0_1_, GROUP1_.GROUP_NAME AS GROUP_NA2_0_1_ FROM USER_GROUPS GROUPS0_ INNER JOIN GROUP[*] GROUP1_ ON GROUPS0_.GROUP_ID=GROUP1_.ID WHERE GROUPS0_.USER_ID=? "; očekáváno "identifier" 
Syntax error in SQL statement "SELECT GROUPS0_.USER_ID AS USER_ID2_4_0_, GROUPS0_.GROUP_ID AS GROUP_ID1_4_0_, GROUP1_.ID AS ID1_0_1_, GROUP1_.GROUP_NAME AS GROUP_NA2_0_1_ FROM USER_GROUPS GROUPS0_ INNER JOIN GROUP[*] GROUP1_ ON GROUPS0_.GROUP_ID=GROUP1_.ID WHERE GROUPS0_.USER_ID=? "; expected "identifier"; SQL statement: 
select groups0_.user_id as user_id2_4_0_, groups0_.group_id as group_id1_4_0_, group1_.id as id1_0_1_, group1_.group_name as group_na2_0_1_ from user_groups groups0_ inner join group group1_ on groups0_.group_id=group1_.id where groups0_.user_id=? [42001-193] 
2016-12-13 08:29:08.335 ERROR 10220 --- [nio-8080-exec-4] o.h.engine.jdbc.spi.SqlExceptionHelper : Chyba syntaxe v SQL příkazu "SELECT GROUPS0_.USER_ID AS USER_ID2_4_0_, GROUPS0_.GROUP_ID AS GROUP_ID1_4_0_, GROUP1_.ID AS ID1_0_1_, GROUP1_.GROUP_NAME AS GROUP_NA2_0_1_ FROM USER_GROUPS GROUPS0_ INNER JOIN GROUP[*] GROUP1_ ON GROUPS0_.GROUP_ID=GROUP1_.ID WHERE GROUPS0_.USER_ID=? "; očekáváno "identifier" 
Syntax error in SQL statement "SELECT GROUPS0_.USER_ID AS USER_ID2_4_0_, GROUPS0_.GROUP_ID AS GROUP_ID1_4_0_, GROUP1_.ID AS ID1_0_1_, GROUP1_.GROUP_NAME AS GROUP_NA2_0_1_ FROM USER_GROUPS GROUPS0_ INNER JOIN GROUP[*] GROUP1_ ON GROUPS0_.GROUP_ID=GROUP1_.ID WHERE GROUPS0_.USER_ID=? "; expected "identifier"; SQL statement: 
select groups0_.user_id as user_id2_4_0_, groups0_.group_id as group_id1_4_0_, group1_.id as id1_0_1_, group1_.group_name as group_na2_0_1_ from user_groups groups0_ inner join group group1_ on groups0_.group_id=group1_.id where groups0_.user_id=? [42001-193] 
2016-12-13 08:29:08.341 WARN 10220 --- [nio-8080-exec-4] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to write HTTP message: org.springframework.http.converter.HttpMessageNotWritableException: Could not write content: could not prepare statement (through reference chain: org.springframework.data.domain.PageImpl["content"]->java.util.Collections$UnmodifiableRandomAccessList[0]->cz.cvut.fit.bi_tjv.fiedlpe1.server.domain.User["groups"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: could not prepare statement (through reference chain: org.springframework.data.domain.PageImpl["content"]->java.util.Collections$UnmodifiableRandomAccessList[0]->cz.cvut.fit.bi_tjv.fiedlpe1.server.domain.User["groups"]) 
2016-12-13 08:29:08.341 WARN 10220 --- [nio-8080-exec-5] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to write HTTP message: org.springframework.http.converter.HttpMessageNotWritableException: Could not write content: could not prepare statement (through reference chain: org.springframework.data.domain.PageImpl["content"]->java.util.Collections$UnmodifiableRandomAccessList[0]->cz.cvut.fit.bi_tjv.fiedlpe1.server.domain.User["groups"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: could not prepare statement (through reference chain: org.springframework.data.domain.PageImpl["content"]->java.util.Collections$UnmodifiableRandomAccessList[0]->cz.cvut.fit.bi_tjv.fiedlpe1.server.domain.User["groups"]) 

Answer 1

あなたドン多対多の問題がありますが、あなたの問題は、groupがsqlの予約済みキーワードであるという事実です。テーブルとエンティティクラスの名前をgroupsなどに変更してください。