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私は、Hibernateを使用して単純なOne To Manyリレーションシップを実行しようとしています。 1つのオーダーが多くのオーダーアイテムを持つことができるという考えがあります。なぜこの例外が出るのかわかりません。私は、オブジェクトの関係をHibernateでかなり新しくしています。このプログラムで設定に問題がある場合は、指摘してください。あなたが私に休止状態でこの種のマッピングをする方法を教えてくれれば、それは素晴らしいことでしょう。ありがとうございました！スキーマ例外Hibernate 1対多
注文
package one_to_many;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
@Entity
public class Order {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int order_id;
private String name;
private String address;
@OneToMany(cascade = { CascadeType.ALL }, orphanRemoval = true, fetch = FetchType.LAZY)
@JoinColumn(name = "order_id", nullable = false)
private List<OrderItem> orderItems;
public Order() {
}
public Order(String name, String address, List<OrderItem> orderItems) {
this.name = name;
this.address = address;
this.orderItems = orderItems;
}
public int getOrder_id() {
return order_id;
}
public void setOrder_id(int order_id) {
this.order_id = order_id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public List<OrderItem> getOrderItems() {
return orderItems;
}
public void setOrderItems(List<OrderItem> orderItems) {
this.orderItems = orderItems;
}
}
のOrderItem
package one_to_many;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class OrderItem {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int orderItemId;
private String itemName;
private int quantity;
public int getOrderItemId() {
return orderItemId;
}
public void setOrderItemId(int orderItemId) {
this.orderItemId = orderItemId;
}
public String getItemName() {
return itemName;
}
public void setItemName(String itemName) {
this.itemName = itemName;
}
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public OrderItem() {
}
public OrderItem(String itemName, int quantity) {
this.itemName = itemName;
this.quantity = quantity;
}
@Override
public String toString() {
return "OrderItem [orderItemId=" + orderItemId + ", itemName=" + itemName + ", quantity=" + quantity + "]";
}
}
ランナー
package one_to_many;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class Runner {
public static void main(String[] args) {
SessionFactory sessionFactory = new Configuration().configure("/one_to_many/hibernate.cfg.xml")
.buildSessionFactory();
Session session = sessionFactory.openSession();
session.beginTransaction();
List<OrderItem> list = new ArrayList<OrderItem>();
list.add(new OrderItem("book", 2));
list.add(new OrderItem("tshirt", 4));
Order order = new Order("regular", "919 Ridge", list);
session.save(order);
session.close();
}
}
エラー
INFO: HHH000262: Table not found: Order
Hibernate:
create table Order (
order_id integer not null auto_increment,
address varchar(255),
name varchar(255),
primary key (order_id)
)
Aug 11, 2016 9:45:40 PM org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException
WARN: GenerationTarget encountered exception accepting command : Unable to execute command [
create table Order (
order_id integer not null auto_increment,
address varchar(255),
name varchar(255),
primary key (order_id)
)]
org.hibernate.tool.schema.spi.CommandAcceptanceException: Unable to execute command [
create table Order (
order_id integer not null auto_increment,
address varchar(255),
name varchar(255),
primary key (order_id)
)]
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:63)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlString(SchemaMigratorImpl.java:573)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlStrings(SchemaMigratorImpl.java:557)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.createTable(SchemaMigratorImpl.java:345)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.performMigration(SchemaMigratorImpl.java:257)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:137)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:110)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:176)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:65)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:308)
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:483)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:707)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:723)
at one_to_many.Runner.main(Runner.java:15)
Caused by: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Order (
order_id integer not null auto_increment,
address varcha' at line 1
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:686)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:663)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:653)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:115)
at com.mysql.cj.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2041)
at com.mysql.cj.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:1994)
at com.mysql.cj.jdbc.StatementImpl.executeInternal(StatementImpl.java:890)
at com.mysql.cj.jdbc.StatementImpl.execute(StatementImpl.java:788)
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:51)
... 13 more
Aug 11, 2016 9:45:40 PM org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl processGetTableResults
INFO: HHH000262: Table not found: Order
Aug 11, 2016 9:45:40 PM org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl processGetTableResults
INFO: HHH000262: Table not found: Order
Aug 11, 2016 9:45:40 PM org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl processGetTableResults
INFO: HHH000262: Table not found: Order
Aug 11, 2016 9:45:40 PM org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl processGetTableResults
INFO: HHH000262: Table not found: Order
Hibernate:
alter table OrderItem
add constraint FK1d77ns82kvwa2hwab9k7xcaog
foreign key (order_id)
references Order (order_id)
Aug 11, 2016 9:45:40 PM org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException
WARN: GenerationTarget encountered exception accepting command : Unable to execute command [
alter table OrderItem
add constraint FK1d77ns82kvwa2hwab9k7xcaog
foreign key (order_id)
references Order (order_id)]
org.hibernate.tool.schema.spi.CommandAcceptanceException: Unable to execute command [
alter table OrderItem
add constraint FK1d77ns82kvwa2hwab9k7xcaog
foreign key (order_id)
references Order (order_id)]
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:63)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlString(SchemaMigratorImpl.java:573)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlStrings(SchemaMigratorImpl.java:557)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applyForeignKeys(SchemaMigratorImpl.java:516)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.performMigration(SchemaMigratorImpl.java:315)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:137)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:110)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:176)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:65)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:308)
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:483)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:707)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:723)
at one_to_many.Runner.main(Runner.java:15)
Caused by: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Order (order_id)' at line 4
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:686)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:663)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:653)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:115)
at com.mysql.cj.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2041)
at com.mysql.cj.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:1994)
at com.mysql.cj.jdbc.StatementImpl.executeInternal(StatementImpl.java:890)
at com.mysql.cj.jdbc.StatementImpl.execute(StatementImpl.java:788)
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:51)
... 13 more
Hibernate:
insert
into
Order (address
, name)
values
(?, ?)
Aug 11, 2016 9:45:40 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 1064, SQLState: 42000
Aug 11, 2016 9:45:40 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Order (address, name) values ('919 Ridge', 'regular')' at line 1
Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not execute statement
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:63)
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:111)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:97)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:207)
at org.hibernate.dialect.identity.GetGeneratedKeysDelegate.executeAndExtract(GetGeneratedKeysDelegate.java:57)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:42)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2840)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3411)
at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:81)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:619)
at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:273)
at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:254)
at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:299)
at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:318)
at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:275)
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:182)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:113)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192)
at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177)
at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)
at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:668)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:660)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:655)
at one_to_many.Runner.main(Runner.java:26)
Caused by: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Order (address, name) values ('919 Ridge', 'regular')' at line 1
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:686)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:663)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:653)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:115)
at com.mysql.cj.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2041)
at com.mysql.cj.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1827)
at com.mysql.cj.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2041)
at com.mysql.cj.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:1977)
at com.mysql.cj.jdbc.PreparedStatement.executeLargeUpdate(PreparedStatement.java:4963)
at com.mysql.cj.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1962)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:204)
... 22 more
問題は、データベースのテーブルに名前の順序がないことです。あなたのスタックトレースの最初の行にあるのはこれです。どのテーブルにマップしたいですか？あなたの場合、 '@ Table'アノテーションを使いたいとします。 [Java Persistence Wikibook]（https://en.wikibooks.org/wiki/Java_Persistence）を見てください。それはJPAの良い紹介です。 – kaba713
お返事ありがとうございます。私はそれを見て、それが役立ちます！ –