What is use of 'Is collection' checkbox in Dynamic attribute screen

Support
#1

What is use of ‘Is collection’ checkbox in Dynamic attribute screen? I was hoping that it would allow creation of multi-valued field instead of singleton value.

#2

Thank you for the question.
This checkbox will allow you to select multiple values in a field, but there’s a bug for now, see the corresponding YouTrack issue. The fix will be delivered with the next 6.5.4 platform release.

#3

:ticket: See the following issue in our bug tracker:

https://youtrack.cuba-platform.com/issue/PL-9218

#4

I was able to reproduce this bug in 6.10.7 platform. This bug is still present, can you update the corresponding bug item for this issue?

Thank you.

#6

Thank you for this report.
Could you please provide an exception stack trace and, if possible, attach a demo project where the bug reproduces.

#7

Reproduce steps and stack trace are below.

Reproduce steps:

  1. under dynamic attributes, create a ‘Car’ category for Asset entity. The dynamic attribute settings are like this: (see attached picture.png)picturetestexample.zip (77.2 KB)

  2. Application -> Asset

  3. Create Asset (asset edit screen)

  4. Enter a value for ‘Make’ and hit ‘OK’
    a. Receive NullPointerException:

Stack Trace

java.lang.NullPointerException
                at java.util.ArrayList.<init>(ArrayList.java:178)
                at com.haulmont.cuba.core.app.dynamicattributes.DynamicAttributesManager.storeCategoryAttributeValueWithCollectionType(DynamicAttributesManager.java:295)
                at com.haulmont.cuba.core.app.dynamicattributes.DynamicAttributesManager.doStoreDynamicAttributes(DynamicAttributesManager.java:272)
                at com.haulmont.cuba.core.app.dynamicattributes.DynamicAttributesManager.storeDynamicAttributes(DynamicAttributesManager.java:191)
                at com.haulmont.cuba.core.app.RdbmsStore.commit(RdbmsStore.java:416)
                at com.haulmont.cuba.core.app.DataManagerBean.commit(DataManagerBean.java:161)
                at com.haulmont.cuba.core.app.DataServiceBean.commit(DataServiceBean.java:41)
                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 org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
                at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
                at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:84)
                at com.haulmont.cuba.core.sys.ServiceInterceptor.aroundInvoke(ServiceInterceptor.java:117)
                at sun.reflect.GeneratedMethodAccessor117.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.lang.reflect.Method.invoke(Method.java:498)
                at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:627)
                at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:616)
                at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:168)
                at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
                at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
                at com.sun.proxy.$Proxy218.commit(Unknown Source)
                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.lang.reflect.Method.invoke(Method.java:498)
                at com.haulmont.cuba.core.sys.remoting.LocalServiceInvokerImpl.invoke(LocalServiceInvokerImpl.java:94)
                at com.haulmont.cuba.web.sys.remoting.LocalServiceProxy$LocalServiceInvocationHandler.invoke(LocalServiceProxy.java:154)
                at com.sun.proxy.$Proxy28.commit(Unknown Source)
                at com.haulmont.cuba.client.sys.DataManagerClientImpl.commit(DataManagerClientImpl.java:100)
                at com.haulmont.cuba.gui.data.impl.GenericDataSupplier.commit(GenericDataSupplier.java:105)
                at com.haulmont.cuba.gui.data.impl.DsContextImpl.commit(DsContextImpl.java:166)
                at com.haulmont.cuba.gui.components.EditorWindowDelegate.commit(EditorWindowDelegate.java:271)
                at com.haulmont.cuba.web.gui.WebWindow$Editor.commitAndClose(WebWindow.java:1773)
                at com.haulmont.cuba.gui.components.AbstractEditor.commitAndClose(AbstractEditor.java:111)
                at com.haulmont.cuba.gui.components.EditorWindowDelegate.lambda$wrapBy$1(EditorWindowDelegate.java:94)
                at com.haulmont.cuba.gui.components.actions.BaseAction.actionPerform(BaseAction.java:228)
                at com.haulmont.cuba.web.gui.components.WebButton.performAction(WebButton.java:46)
#8

Thank you for so detailed answer! It seems like a different bug so I’ve created a new GitHub issue.

Regards,
Sergey

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