Micronaut不可能使用PersistenceContext
Micronaut不可能使用PersistenceContext
提问于 2019-10-15 14:10:15
我是新来的，我试着跟着这个小项目。不过，我希望它能与postgres一起工作。
我的application.yml看起来是这样的：
micronaut:
application:
name: hello-world
datasources:
default:
url: 'jdbc:postgresql://localhost:5432/test'
username: test
password: test
driver-class-name: org.postgresql.Driver
jpa:
default:
properties:
hibernate:
hbm2ddl:
auto: update
show_sql: true我可以通过intellij访问数据库。在pom.xml中，我有以下依赖项：
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.8</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>io.micronaut.configuration</groupId>
<artifactId>micronaut-jdbc-hikari</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>io.micronaut.configuration</groupId>
<artifactId>micronaut-hibernate-jpa</artifactId>
</dependency>此外，在链接中提到需要annotionProcessor，因此我将其添加到构建概要文件中：
<annotationProcessorPaths>
<path>
<groupId>javax.persistence</groupId>
<artifactId>javax.persistence-api</artifactId>
<version>2.2</version>
</path>
</annotationProcessorPaths>所以每次我试着做以下几件事：
@PersistenceContext
private EntityManager entityManager;我得到以下错误：
Caused by: io.micronaut.context.exceptions.NoSuchBeanException: No bean of type [javax.persistence.EntityManager] exists. Make sure the bean is not disabled by bean requirements (enable trace logging for 'io.micronaut.context.condition' to check) and if the bean is enabled then ensure the class is declared a bean and annotation processing is enabled (for Java and Kotlin the 'micronaut-inject-java' dependency should be configured as an annotation processor).但是，我已经启用了annotation processing。我还有一个@Entity-class：
@Entity
@Table(name = "users")
public class User {
@NotBlank
@Column(name = "name")
private String userName;
public User() {
}
public User(@NotBlank final String userName) {
this.userName = userName;
}
public String getUserName() {
return userName;
}
public void setUserName(final String userName) {
this.userName = userName;
}
}我在我的设计中到底遗漏了什么？
回答 1
Stack Overflow用户
回答已采纳
发布于 2019-10-15 14:43:50
我的设置有很多问题。
datasource和jpa需要在根级@Entity需要一个@Id
最后，application.yml看起来是这样的：
micronaut:
application:
name: hello-world
datasources:
default:
url: 'jdbc:postgresql://localhost:5432/test'
username: test
password: test
driver-class-name: org.postgresql.Driver
jpa:
default:
packages-to-scan:
- 'test'
properties:
hibernate:
hbm2ddl:
auto: update
show_sql: true@Entity-Class需要一个@Id-Attribute：
@Entity
@Table(name = "users")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@NotBlank
@Column(name = "user_name")
private String userName;
public User() {
}
public User(@NotBlank final String userName) {
this.userName = userName;
}
public String getUserName() {
return userName;
}
public void setUserName(final String userName) {
this.userName = userName;
}
@Override
public String toString() {
return "User{" +
"userName='" + userName + '\'' +
'}';
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/58396675
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