Vaadin DateField 将空值保存到数据库
Vaadin DateField saves null value to database
我正在使用 VAADIN 8 并遇到了一个问题。我已经绑定了 FormLayout 上的所有字段，并希望将这些字段的值保存在数据库中。所有字段都填充了值。问题的实质是当对象保存到数据库时，DateField 值被发送为 null
问题是DateFiled为什么有空值，如何取胜？
VAADIN v.8.6.2
实体（简体）：
@Entity
@DynamicInsert
@DynamicUpdate
@Table(name = "Orders")
public class Order{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "OrderID", nullable = false)
private Long orderID;
@Column(name = "Description", nullable = false, length = 1000)
private String description;
@Column(name = "CreationDate", nullable = false)
private Date creationDate;
public Long getOrderID() { return orderID; }
public String getDescription() { return description; }
public void setDescription(String description) { this.description = description; }
public Date getCreationDate() { return creationDate; }
public void setCreationDate(Date creationDate) { this.creationDate = creationDate; }
}
订单服务（简体）：
public class OrderService {
private static OrderDao orderService;
public OrderService() {
orderService = new OrderDao();
}
public void persist(Order entity) {
orderService.openCurrentSessionwithTransaction();
orderService.persist(entity);
orderService.closeCurrentSessionwithTransaction();
}
}
绑定（简化）：
Binder<Order> binder = new Binder<>(Order.class);
FormLayout formLayout = new FormLayout();
TextField description = new TextField("Description");
DateField creationDate = new DateField("Creation Date");
private Button save = new Button("Save");
private Button cancel = new Button("Cancel");
HorizontalLayout actions = new HorizontalLayout();
actions.addComponents(save, cancel);
formLayout.addComponents(clientId, description, creationDate, actions);
creationDate.setDateFormat("yyyy-MM-dd HH:mm:ss");
binder.forField(this.clientId)
.bind(Order::getClientID, Order::setClientID);
binder.forField(this.description)
.bind(Order::getDescription, Order::setDescription);
binder.forField(this.creationDate)
.withConverter(new SqlDateToLocalDateConverter())
.bind(Order::getCreationDate, Order::setCreationDate); //the likely problem
binder.bindInstanceFields(this);
binder.setBean(order);
save.addClickListener(e -> save());
cancel.addClickListener(e -> close());
转换器class:
import com.vaadin.data.Converter;
import com.vaadin.data.Result;
import com.vaadin.data.ValueContext;
import java.sql.Date;
import java.time.LocalDate;
public class SqlDateToLocalDateConverter implements Converter<LocalDate, Date> {
@Override
public Result<java.sql.Date> convertToModel(LocalDate value, ValueContext context) {
if (value == null) {
return Result.ok(null);
}
return Result.ok( java.sql.Date.valueOf(value) );
}
@Override
public LocalDate convertToPresentation(java.sql.Date value, ValueContext context) {
if (value == null) {
return LocalDate.now();
}
return value.toLocalDate();
}
}
调试模式表示creationDate字段为空：
堆栈跟踪：
org.hibernate.PropertyValueException: not-null property references a null or transient value : com.haulmont.testtask.model.Order.creationDate
at org.hibernate.engine.internal.Nullability.checkNullability(Nullability.java:108)
at org.hibernate.engine.internal.Nullability.checkNullability(Nullability.java:56)
at org.hibernate.action.internal.AbstractEntityInsertAction.nullifyTransientReferencesIfNotAlready(AbstractEntityInsertAction.java:115)
at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:69)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:645)
at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:282)
at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:263)
at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:317)
at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:359)
at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:292)
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:200)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:131)
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:709)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:701)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:696)
at com.haulmont.testtask.dao.OrderDao.persist(OrderDao.java:67)
at com.haulmont.testtask.service.OrderService.persist(OrderService.java:18)
at com.haulmont.testtask.ui.AddOrderModalView.save(AddOrderModalView.java:187)
at com.haulmont.testtask.ui.AddOrderModalView.lambda$new446b05(AddOrderModalView.java:111)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:499)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:273)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:237)
at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:1014)
at com.vaadin.ui.Button.fireClick(Button.java:384)
at com.vaadin.ui.Button.click(Button.java:57)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:155)
at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:116)
at com.vaadin.server.communication.ServerRpcHandler.handleInvocation(ServerRpcHandler.java:445)
at com.vaadin.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:410)
at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:274)
at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:90)
at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:40)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1601)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:445)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:845)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1689)
at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:225)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1174)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1106)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
at org.eclipse.jetty.server.Server.handle(Server.java:524)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:319)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:253)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
at org.eclipse.jetty.io.SelectChannelEndPoint.run(SelectChannelEndPoint.java:93)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
at org.eclipse.jetty.util.thread.QueuedThreadPool.run(QueuedThreadPool.java:589)
at java.lang.Thread.run(Thread.java:748)
一切正常，除了您的自定义转换器中的一个小细节 class：日期的用法有一点不一致 class。
你三次使用 java.sql.Date 作为 class 的标识符，但有一次你忘记了它 (implements Converter<LocalDate, Date>)，并且错误地使用了 java.utils.Date。
在那里添加包路径 java.sql.Date 也可以解决问题
import com.vaadin.data.Converter;
import com.vaadin.data.Result;
import com.vaadin.data.ValueContext;
import java.sql.Date;
import java.time.LocalDate;
public class SqlDateToLocalDateConverter implements Converter<LocalDate, java.sql.Date> {
@Override
public Result<java.sql.Date> convertToModel(LocalDate value, ValueContext context) {
if (value == null) {
return Result.ok(null);
}
return Result.ok( java.sql.Date.valueOf(value) );
}
@Override
public LocalDate convertToPresentation(java.sql.Date value, ValueContext context) {
if (value == null) {
return LocalDate.now();
}
return value.toLocalDate();
}
}
我正在使用 VAADIN 8 并遇到了一个问题。我已经绑定了 FormLayout 上的所有字段，并希望将这些字段的值保存在数据库中。所有字段都填充了值。问题的实质是当对象保存到数据库时，DateField 值被发送为 null
问题是DateFiled为什么有空值，如何取胜？
VAADIN v.8.6.2
实体（简体）：
@Entity
@DynamicInsert
@DynamicUpdate
@Table(name = "Orders")
public class Order{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "OrderID", nullable = false)
private Long orderID;
@Column(name = "Description", nullable = false, length = 1000)
private String description;
@Column(name = "CreationDate", nullable = false)
private Date creationDate;
public Long getOrderID() { return orderID; }
public String getDescription() { return description; }
public void setDescription(String description) { this.description = description; }
public Date getCreationDate() { return creationDate; }
public void setCreationDate(Date creationDate) { this.creationDate = creationDate; }
}
订单服务（简体）：
public class OrderService {
private static OrderDao orderService;
public OrderService() {
orderService = new OrderDao();
}
public void persist(Order entity) {
orderService.openCurrentSessionwithTransaction();
orderService.persist(entity);
orderService.closeCurrentSessionwithTransaction();
}
}
绑定（简化）：
Binder<Order> binder = new Binder<>(Order.class);
FormLayout formLayout = new FormLayout();
TextField description = new TextField("Description");
DateField creationDate = new DateField("Creation Date");
private Button save = new Button("Save");
private Button cancel = new Button("Cancel");
HorizontalLayout actions = new HorizontalLayout();
actions.addComponents(save, cancel);
formLayout.addComponents(clientId, description, creationDate, actions);
creationDate.setDateFormat("yyyy-MM-dd HH:mm:ss");
binder.forField(this.clientId)
.bind(Order::getClientID, Order::setClientID);
binder.forField(this.description)
.bind(Order::getDescription, Order::setDescription);
binder.forField(this.creationDate)
.withConverter(new SqlDateToLocalDateConverter())
.bind(Order::getCreationDate, Order::setCreationDate); //the likely problem
binder.bindInstanceFields(this);
binder.setBean(order);
save.addClickListener(e -> save());
cancel.addClickListener(e -> close());
转换器class:
import com.vaadin.data.Converter;
import com.vaadin.data.Result;
import com.vaadin.data.ValueContext;
import java.sql.Date;
import java.time.LocalDate;
public class SqlDateToLocalDateConverter implements Converter<LocalDate, Date> {
@Override
public Result<java.sql.Date> convertToModel(LocalDate value, ValueContext context) {
if (value == null) {
return Result.ok(null);
}
return Result.ok( java.sql.Date.valueOf(value) );
}
@Override
public LocalDate convertToPresentation(java.sql.Date value, ValueContext context) {
if (value == null) {
return LocalDate.now();
}
return value.toLocalDate();
}
}
调试模式表示creationDate字段为空：
堆栈跟踪：
org.hibernate.PropertyValueException: not-null property references a null or transient value : com.haulmont.testtask.model.Order.creationDate
at org.hibernate.engine.internal.Nullability.checkNullability(Nullability.java:108)
at org.hibernate.engine.internal.Nullability.checkNullability(Nullability.java:56)
at org.hibernate.action.internal.AbstractEntityInsertAction.nullifyTransientReferencesIfNotAlready(AbstractEntityInsertAction.java:115)
at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:69)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:645)
at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:282)
at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:263)
at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:317)
at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:359)
at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:292)
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:200)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:131)
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:709)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:701)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:696)
at com.haulmont.testtask.dao.OrderDao.persist(OrderDao.java:67)
at com.haulmont.testtask.service.OrderService.persist(OrderService.java:18)
at com.haulmont.testtask.ui.AddOrderModalView.save(AddOrderModalView.java:187)
at com.haulmont.testtask.ui.AddOrderModalView.lambda$new446b05(AddOrderModalView.java:111)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:499)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:273)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:237)
at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:1014)
at com.vaadin.ui.Button.fireClick(Button.java:384)
at com.vaadin.ui.Button.click(Button.java:57)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:155)
at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:116)
at com.vaadin.server.communication.ServerRpcHandler.handleInvocation(ServerRpcHandler.java:445)
at com.vaadin.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:410)
at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:274)
at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:90)
at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:40)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1601)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:445)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:845)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1689)
at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:225)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1174)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1106)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
at org.eclipse.jetty.server.Server.handle(Server.java:524)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:319)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:253)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
at org.eclipse.jetty.io.SelectChannelEndPoint.run(SelectChannelEndPoint.java:93)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
at org.eclipse.jetty.util.thread.QueuedThreadPool.run(QueuedThreadPool.java:589)
at java.lang.Thread.run(Thread.java:748)
一切正常，除了您的自定义转换器中的一个小细节 class：日期的用法有一点不一致 class。
你三次使用 java.sql.Date 作为 class 的标识符，但有一次你忘记了它 (implements Converter<LocalDate, Date>)，并且错误地使用了 java.utils.Date。
在那里添加包路径 java.sql.Date 也可以解决问题
import com.vaadin.data.Converter;
import com.vaadin.data.Result;
import com.vaadin.data.ValueContext;
import java.sql.Date;
import java.time.LocalDate;
public class SqlDateToLocalDateConverter implements Converter<LocalDate, java.sql.Date> {
@Override
public Result<java.sql.Date> convertToModel(LocalDate value, ValueContext context) {
if (value == null) {
return Result.ok(null);
}
return Result.ok( java.sql.Date.valueOf(value) );
}
@Override
public LocalDate convertToPresentation(java.sql.Date value, ValueContext context) {
if (value == null) {
return LocalDate.now();
}
return value.toLocalDate();
}
}