mysql数据库中不存在表

Question

我使用JPA作为数据库，我正确地定义了一对多和一对加入我的实体类，但它不能为我的收据实体类。我不明白我错在哪里。我完整检查实体类，但我无法找到我的错误。下面是我在运行应用程序时得到的错误类型。

org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "alter table receipt add constraint FK57qulpfkyxvba4mmdup6l3vot foreign key (problem_id) references disease (problem_id)" via JDBC Statement
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applySqlString(AbstractSchemaMigrator.java:562) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applySqlStrings(AbstractSchemaMigrator.java:507) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applyForeignKeys(AbstractSchemaMigrator.java:433) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.performMigration(AbstractSchemaMigrator.java:249) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.doMigration(AbstractSchemaMigrator.java:114) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:184) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:318) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:468) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1259) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.3.10.jar:5.3.10]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.3.10.jar:5.3.10]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-5.3.10.jar:5.3.10]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-5.3.10.jar:5.3.10]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.3.10.jar:5.3.10]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.10.jar:5.3.10]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.10.jar:5.3.10]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.10.jar:5.3.10]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.10.jar:5.3.10]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.10.jar:5.3.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.10.jar:5.3.10]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.10.jar:5.3.10]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.10.jar:5.3.10]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154) ~[spring-context-5.3.10.jar:5.3.10]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908) ~[spring-context-5.3.10.jar:5.3.10]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.10.jar:5.3.10]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.5.5.jar:2.5.5]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-2.5.5.jar:2.5.5]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[spring-boot-2.5.5.jar:2.5.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:338) ~[spring-boot-2.5.5.jar:2.5.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-2.5.5.jar:2.5.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332) ~[spring-boot-2.5.5.jar:2.5.5]
at com.nillmani.hospitalmanagement.HospitalManagementApplicationKt.main(HospitalManagementApplication.kt:13) ~[main/:na]
Caused by: java.sql.SQLSyntaxErrorException: Table 'hospital-management.receipt' doesn't exist
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:120) ~[mysql-connector-java-8.0.26.jar:8.0.26]
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122) ~[mysql-connector-java-8.0.26.jar:8.0.26]
at com.mysql.cj.jdbc.StatementImpl.executeInternal(StatementImpl.java:764) ~[mysql-connector-java-8.0.26.jar:8.0.26]
at com.mysql.cj.jdbc.StatementImpl.execute(StatementImpl.java:648) ~[mysql-connector-java-8.0.26.jar:8.0.26]
at com.zaxxer.hikari.pool.ProxyStatement.execute(ProxyStatement.java:94) ~[HikariCP-4.0.3.jar:na]
at com.zaxxer.hikari.pool.HikariProxyStatement.execute(HikariProxyStatement.java) ~[HikariCP-4.0.3.jar:na]
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
... 33 common frames omitted

Receipt.kt

package com.nillmani.hospitalmanagement.entity
import java.time.LocalDate
import javax.persistence.*
@Entity
data class Receipt(
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
val receipeId:Long=-1,
val details :String="",
val barcode : String ="",
val drug_details: String="",
val usage : String ="",
val delivery_Date : LocalDate= LocalDate.now(),
val diseaseId:Long=-1,//refere to  problmeID
val patientId:Long=-1,
val status : Int=0,
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "problemId",referencedColumnName = "problemId")
val disease: Disease
)

Disease.kt

package com.nillmani.hospitalmanagement.entity
import com.nillmani.hospitalmanagement.entity.enum.ProblemStatus
import org.jetbrains.annotations.NotNull
import javax.persistence.*
@Entity
data class Disease(
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
val problemId:Long=-1,
val diseaseName:String="",
val diseaseDetails:String="",
val problemStatus : ProblemStatus,
var status : Int=0,
val seekPersonId : Long=-1,//Basically Belongs form patientID
val admissionId : Long =-1,
@NotNull
@ManyToOne(cascade = [CascadeType.ALL],fetch = FetchType.LAZY)
@JoinColumn(name = "patientid",referencedColumnName = "patientid")
val patient: Patient,
@OneToMany(cascade = [CascadeType.ALL],fetch = FetchType.LAZY,mappedBy = "disease")
val receipes :List<Receipt> = ArrayList()
)

我提供这两个表之间的连接，但是每个实体类都存在在数据库中，但接收实体类不能在数据库中存在。这类问题的原因是什么application.yml

spring:
datasource:
url: jdbc:mysql://localhost:3307/hospital-management
driverClassName: com.mysql.cj.jdbc.Driver
username: root
password:
jpa:
database-platform: org.hibernate.dialect.MySQL5Dialect
show-sql: true
hibernate:
ddl-auto: update
generate-ddl: true
app:
jwt:
secret: ArbitrarySecretKey
expiration-in-ms: 864000000
token:
prefix: Bearer
header:
string: Authorization

application.properties

logging.level.org.hibernate.SQL=debug

Answer 1

由于您正在使用Jpa与Hibernate，您可以在应用程序中设置
spring.jpa.generate-ddl=true或
spring.jpa.hibernate.ddl-auto=create。属性文件初始化表

注意:将ddl-auto设置为create将在每次重新启动应用程序时删除表。您可能需要使用update。