Select component cannot store a blank value on the client side and have it
represent null.
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Key: TAPESTRY-2176
URL: https://issues.apache.org/jira/browse/TAPESTRY-2176
Project: Tapestry
Issue Type: Bug
Components: Core Components
Affects Versions: 5.0.10
Environment: Windows XP, Eclipse 3.3.1, Hibernate, Jetty
Reporter: Daniel
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)
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