我有一个使用liquibase和postgresql的sprint-boot 1.1.4.RELEASE应用程序。
我有两个实体:
@Entity
public class Menu {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long menuId;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "menu", fetch = FetchType.EAGER)
private List<MenuItem> menuItems = new ArrayList<MenuItem>();
@ManyToOne
@JoinColumn(name = "subscriptionPackageId", nullable = false)
private SubscriptionPackage subscriptionPackage;
private String displayText;
private int displayOrder;
和
@Entity
public class MenuItem {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long menuItemId;
private String displayText;
private String path;
private String toolTip;
private int displayOrder;
@ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
@JoinColumn(name = "menuId", nullable = false)
private Menu menu;
@Enumerated(EnumType.STRING)
@Column(name = "callType", nullable = false)
private HttpType callType;
我在db.changelog-master.xml中有以下内容:
<databaseChangeLog
xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.0.xsd"
objectQuotingStrategy="QUOTE_ALL_OBJECTS">
<changeSet id="1" author="me" >
<preConditions onFail="MARK_RAN">
<not>
<tableExists tableName="SubscriptionPackage"/>
<tableExists tableName="Menu"/>
<tableExists tableName="MenuItem"/>
</not>
</preConditions>
<createSequence sequenceName="hibernate_sequence"/>
<createTable tableName="SubscriptionPackage">
<column name="subscriptionPackageId" type="bigint" autoIncrement="true">
<constraints primaryKey="true"/>
</column>
<column name="servicePackage" type="varchar(300)"/>
<column name="description" type="varchar(500)"/>
</createTable>
<createTable tableName="Menu">
<column name="menuId" type="bigint" autoIncrement="true">
<constraints primaryKey="true"/>
</column>
<column name="subscriptionPackageId" type="bigint"/>
<column name="displayText" type="varchar(300)"/>
<column name="displayOrder" type="int"/>
</createTable>
<createTable tableName="MenuItem">
<column name="menuItemId" type="bigint" autoIncrement="true">
<constraints primaryKey="true"/>
</column>
<column name="menuId" type="bigint">
<!--<constraints foreignKeyName="fk_menu_item" references="Menu(menuId)"/>-->
</column>
<column name="displayText" type="varchar(100)"/>
<column name="path" type="varchar(100)"/>
<column name="toolTip" type="varchar(500)"/>
<column name="displayOrder" type="int"/>
<column name="callType" type="varchar(50)"/>
</createTable>
</changeSet>
</databaseChangeLog>
在启动时执行,postgresql向我显示以下表的SQL:
CREATE TABLE "Menu"
(
"menuId" bigserial NOT NULL,
"subscriptionPackageId" bigint,
"displayText" character varying(300),
"displayOrder" integer,
CONSTRAINT pk_menu PRIMARY KEY ("menuId")
)
CREATE TABLE "MenuItem"
(
"menuItemId" bigserial NOT NULL,
"menuId" bigint,
"displayText" character varying(100),
path character varying(100),
"toolTip" character varying(500),
"displayOrder" integer,
"callType" character varying(50),
CONSTRAINT pk_menuitem PRIMARY KEY ("menuItemId"),
CONSTRAINT fk_menu_item FOREIGN KEY ("menuId")
REFERENCES "Menu" ("menuId") MATCH SIMPLE
ON UPDATE RESTRICT ON DELETE CASCADE
)
我有一个MenuRepository:
@Repository
public interface MenuRepository extends CrudRepository<Menu, Long> {
List<Menu> findAll();
List<Menu> findBySubscriptionPackage( SubscriptionPackage subscriptionPackage);
}
启动时,以下行导致异常:
List<Menu> menus = menuRepository.findAll()
是:
Caused by: org.postgresql.util.PSQLException: ERROR: relation "menu" does not exist
Position: 166
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2102)
正在提交的sql是:
select menu0_.menu_id as menu_id1_0_, menu0_.display_order as display_2_0_, menu0_.display_text as display_3_0_, menu0_.subscription_package_id as subscrip4_0_ from menu menu0_
我认为我的映射很好,菜单包含许多双向关系的MenuItem。我有一些其他映射失败的同一类型的问题,并且那些在关系错误名称中有下划线而不是camel情况;这让我想知道这是否是我使用 spring.jpa.hibernate.ejb.naming_strategy = org.hibernate.cfg.EJB3NamingStrategy
的副作用基于“a_horse_with_no_name”出色的建议,我通过SQL手动创建了菜单表,没有引号,我又得到了一个错误:
Caused by: org.postgresql.util.PSQLException: ERROR: column menu0_.menu_id does not exist
这也是一个案例问题,因此我必须错误地配置Liquibase以告诉Postgresql忽略case和camelcase。
我在更改日志中尝试了以下内容:
objectQuotingStrategy="LEGACY"
objectQuotingStrategy="QUOTE_ALL_OBJECTS"
objectQuotingStrategy="QUOTE_ONLY_RESERVED_WORDS"
并且所有三个都用引号创建我的表和列。
答案 0 :(得分:0)
好的,我已经解决了所有问题并且发布以防其他人遇到同样的问题。似乎Spring-Boot或其他东西期望列名称具有下划线而不是camelCase。我将liquibase变更设置改为:
<createTable tableName="MENU">
<column name="menu_id" type="bigint" autoIncrement="true">
<constraints primaryKey="true"/>
</column>
<column name="subscription_package_id" type="bigint"/>
<column name="display_text" type="varchar(300)"/>
<column name="display_order" type="int"/>
</createTable>
然后我还必须在每个实体上声明表名:
@Entity
@Table(name = "MENU")
public class Menu {
...
}
实体案例之间存在“_”。我不知道是否有办法覆盖这个,或者即使我应该,就像我使用EJBNamingStrategy一样。我无法在任何地方找到它,但我碰巧在spring-boot flyway项目的集成测试中注意到它。
这感觉不对,我不记得之前必须在实体上声明表名,但我是Postgresql的新手所以我不能说它是否因为它区分大小写或问题所在。如果这是正确的,我会很高兴听到,如果我在某个地方犯了错误。