topic Re: Get property constraints in Alfresco Archive

Get property constraints

joblo — Tue, 23 Jul 2013 13:28:03 GMT

Hi,Im trying to get all the constraints from my Alfresco data-model in Java. Right now I'm able to get the maxLength of a String property. In the Alfresco data-model is it also possible to put the minLength of a d:text. In the openCMIS PropertyStringDefinition interface there is only a function to g

Re: Get property constraints

jpotts — Mon, 29 Jul 2013 18:42:30 GMT

I don't think constraints are part of the spec because they are repository specific. You'll have to write an extension or use a web script to retrieve that.

Jeff

Re: Get property constraints

joblo — Mon, 12 Aug 2013 11:28:07 GMT

OK thanks for the response. I'll try to get it on another way then.

Re: Get property constraints

xkahn — Mon, 23 Sep 2013 17:59:49 GMT

<blockquote>I don't think constraints are part of the spec because they are repository specific. You'll have to write an extension or use a web script to retrieve that.</blockquote>

Okay. Is there such an extension for Alfresco? Lets say I have a property that I've added: sc:status which is a string with a constraint of Red, Yellow, or Green. Using CMIS, I get the following from Alfresco on a document with the property applied:

<cmisropertyString propertyDefinitionId="sc:status" displayName="Status" queryName="sc:status"><cmis:value>Red</cmis:value></cmisropertyString>

How can I see what the possible values are?

Re: Get property constraints

jpotts — Mon, 23 Sep 2013 19:39:46 GMT

For a list constraint, no extension is necessary. CMIS sees that as a "closed list" and there are calls defined by the spec to get the "choices" available for the constraint from the Dictionary Service.

The OpenCMIS Workbench is a spec-compliant client that knows how to fetch these values. In the attached screenshot, I'm showing the Workbench Types inspector which is currently opened on the sc:marketingDoc type from the SomeCo examples. That type has a constraint called sc:campaignList, which is a list constraint that defines three possible values. The sc:campaign property is constrained by the sc:compaignList constraint, so you can use the dictionary service to ask for the allowed values.

Jeff