[TAPESTRY-2176] Select component cannot store a blank value on the client side and have it represent null.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 5.0.10
• Component/s: Core Components
• Environment: Windows XP, Eclipse 3.3.1, Hibernate, Jetty
• Assignee: Howard Lewis Ship
• Reporter: Daniel
• Created: 19/Feb/08 16:50
• Updated: 02/Mar/08 22:28
• Resolved: 02/Mar/08 22:28

Description

When implementing a select component that is populated with values from a database column, which represents a many to one relationship with the object/entity represented by the form containing the select component, blank values can be added and validated when editing the object/entity, but not when creating a new object/entity.

For example, on a form representing a Product entity that contains a select component with a list of Manufacturers, it is possible to:

1. have a blank Manufacturer by default
2. edit a Product and select the blank Manufacturer and get the validation="required" message when attempting to save

but it is not possible to get the validation message when creating a new Product if the blank Manufacturer is selected when saving. Instead the following exception (partial) is thrown:

• org.apache.tapestry.ioc.internal.util.Defense.notBlank(Defense.java:59)
• org.apache.tapestry.internal.TapestryInternalUtils.encodeContext(TapestryInternalUtils.java:519)
• org.apache.tapestry.internal.services.ComponentInvocationImpl.getPath(ComponentInvocationImpl.java:101)
• org.apache.tapestry.internal.services.ComponentInvocationImpl.buildURI(ComponentInvocationImpl.java:60)
• org.apache.tapestry.internal.services.LinkImpl.buildURI(LinkImpl.java:105)
• org.apache.tapestry.internal.services.LinkImpl.toRedirectURI(LinkImpl.java:120)
• org.apache.tapestry.internal.services.ResponseImpl.sendRedirect(ResponseImpl.java:69)
• org.apache.tapestry.internal.services.ActionRenderResponseGeneratorImpl.generateResponse(ActionRenderResponseGeneratorImpl.java:45)
• org.apache.tapestry.internal.services.ComponentEventRequestHandlerImpl.handle(ComponentEventRequestHandlerImpl.java:66)
• org.apache.tapestry.internal.services.ImmediateActionRenderResponseFilter.handle(ImmediateActionRenderResponseFilter.java:42)
• org.apache.tapestry.internal.services.AjaxFilter.handle(AjaxFilter.java:42)
• org.apache.tapestry.services.TapestryModule$39.handle(TapestryModule.java:2073)
• org.apache.tapestry.internal.services.ComponentEventDispatcher.dispatch(ComponentEventDispatcher.java:131)
• org.apache.tapestry.services.TapestryModule$13.service(TapestryModule.java:911)
• com.formos.project.services.AppModule$1.service(AppModule.java:134)