topic 4.2.c regression on custom constraint in Alfresco Archive

4.2.c regression on custom constraint

scouil — Fri, 25 Jan 2013 10:44:19 GMT

I've developped a custom constraint extending the ListOfValuesConstraint.It was running fine in 4.2.b and before but ends up giving me trouble in 4.2.cThe error happens when looking at the "Workflow Details" of a workflow containing a field based on that constraint.I get a simple "Failure" popup and

Re: 4.2.c regression on custom constraint

armino — Tue, 29 Jan 2013 08:42:04 GMT

Same problem here: https://forums.alfresco.com/forum/end-user-discussions/alfresco-share/redering-custom-model-broken-42c-01282013-1702.

It appears that 4.2.c cannot handle any reference to a custom constraint. My exception chain looks the same. Going back to 4.2.b instantly resolved the issue.

It is frustrating and immensely time consuming that such basic things dont work!!!

-Armin

Re: 4.2.c regression on custom constraint

nmcminn — Tue, 09 Apr 2013 20:18:23 GMT

The fieldConfig object referenced in line 1956 of FormUIGet.java appears to be populated by the form config in share-config-custom.xml. I was running into the same NullPointerException at that line when rendering a custom action form. What I did was add a very simple form section to share-config-custom.xml for that form, like so:


    <config evaluator="string-compare" condition="your_condition">
       <forms>
           <form>
                <appearance>
                    <field id="the_field_using_the_constraint"></field>
                </appearance>
            </form>
        </forms>
    </config>
‍‍‍‍‍‍‍‍‍‍‍

It seems that just having the field defined in the form config is enough to make sure that the FormField object is not null, and the NPE goes away.

Hope it works for you

Re: 4.2.c regression on custom constraint

scouil — Wed, 10 Apr 2013 06:27:50 GMT

Hello Nathan,

Yes I came up with the same workaround,

I signaled it on another forum thred that was created on the same issue short after this one (http://forums.alfresco.com/comment/129477#comment-129477) but forgot to report it here as well.
Thanks for your input.

Re: 4.2.c regression on custom constraint

monocromo — Wed, 10 Apr 2013 15:53:00 GMT

Hi, i have the same problem with alfresco 4.2.c and ubuntu 12.04.2 LTS, when i want to edit the property (using share) of a file that use a custom-content with constraint list alfresco share show this error:


An error has occured in the Share component: /share/service/components/form.
It responded with a status of 500 - Internal Error.
Error Code Information: 500 - An error inside the HTTP server which prevented it from fulfilling the request.
Error Message: 03100006 Wrapped Exception (with status template): null
Server: Alfresco Spring WebScripts - v1.2.0 (Release 1207) schema 1.000
Time: 10-apr-2013 15.51.46
Click here to view full technical information on the error.
Exception: org.springframework.extensions.webscripts.WebScriptException - 03100006 Wrapped Exception (with status template): null
org.springframework.extensions.webscripts.AbstractWebScript.createStatusException(AbstractWebScript.java:1067)
‍‍‍‍‍‍‍‍‍‍‍

it's possible solve the problem?
The solution of nmcminn not work!

Re: 4.2.c regression on custom constraint

zorglub — Tue, 18 Feb 2014 08:08:00 GMT

Tried your workaround, and still have the NPE. I can't figure out what "your_condition" should be.

Re: 4.2.c regression on custom constraint

scouil — Tue, 18 Feb 2014 09:28:41 GMT

Hi,

The idea behind this workaround is that if you redefine the form fields explicitly, the NPE will disappear.
Please refer to http://wiki.alfresco.com/wiki/Forms to configure forms in share.

Re: 4.2.c regression on custom constraint

zorglub — Tue, 18 Feb 2014 12:12:16 GMT

Hi, thanks for your reply.
You mean that I should not rely on the automatic form generation and explicitly define a creation/modification form for custom type(s) relying on LIST constraint ?
I added
<code lang="xml">
   <config evaluator="string-compare" condition="your_condition">
      <forms>
         <form>
            <appearance>
               <field id="ag:documentNature"></field>
            </appearance>
         </form>
      </forms>
   </config>
</code>
in share-config-custom.xml and it doesn't correct the NPE.

Re: 4.2.c regression on custom constraint

scouil — Tue, 18 Feb 2014 14:10:00 GMT

Hi,

Yes. For this specific version of Alfresco, a bug forces you to redefine the form instead of relying on the automatic one when you have a custom list constraint.

I'd like to avoid giving you just the snippet of code because otherwise you'll just paste it and forget about it and it might cause you trouble with future customisation.
Basically the part that is wrong here is your first line where "your_condition" should obviously be replace by something that is specific to your actual model.
And actually, if you read the link I sent you, you'll more often see examples using

<config evaluator="node-type" condition="your_condition">‍

Good luck with your customisation.

Re: 4.2.c regression on custom constraint

darkstar1 — Wed, 26 Mar 2014 16:01:15 GMT

I know I'm a little late to the party but I need to solve this for a 4.2.c that I'm working with unfortunately. I tried your fix using the following


    <config evaluator="string-compare" condition="activiti$activitiCreateEvenement">
        <forms>
            <form>
                <appearance>
                    <field id="wfevt:theme1" />
                    <field id="wfevt:theme2" />
                </appearance>
            </form>
        </forms>
    </config>
‍‍‍‍‍‍‍‍‍‍‍‍

to no joy I'm afraid. I still get the null error. I hope to be able to solve this soon because it's eating my day.
Will post back if I do. In the mean time if anyone has any ideas, I'd be happy to receive them. I'm working in a 4.2.c maven build