topic Re: Process variable issue in domain classes where one to one relation exists in Alfresco Archive

Process variable issue in domain classes where one to one relation exists

srikanthkollipa — Wed, 07 Oct 2015 05:49:14 GMT

Hi,I have a form where user enters the information while raising a request. This information will be stored in multiple tables.Parent Domain – RequestDetailsChild – RequestAttributesChild – RequestStipulationsThe relation is RequestDetails to RequestAttributes is one-to-one.For RequestDetails–Reques

Re: Process variable issue in domain classes where one to one relation exists

jbarrez — Thu, 08 Oct 2015 09:28:55 GMT

"could not find a variable type to serialize "

Means that you try to store something of a type that Activiti does not know how to store. What is this 'child domain' class you are talking about? Does it need to live as a process var in Activiti or is just storing the ids enough?

Re: Process variable issue in domain classes where one to one relation exists

srikanthkollipa — Thu, 08 Oct 2015 15:33:47 GMT

Thanks for the reply. Here the child domain class is 'RequestAttributes' which is having 4 variables like requestType(string), noOfSamples(long), referenceId(long), comments(string).

Parent class has one to one relationship with this child class.

Parent class has few more attributes like personName (string), personId(long) and personRole(long).

Re: Process variable issue in domain classes where one to one relation exists

trademak — Fri, 09 Oct 2015 08:07:11 GMT

Do your classes implement the Serializable interface?

Best regards,

Re: Process variable issue in domain classes where one to one relation exists

srikanthkollipa — Fri, 09 Oct 2015 15:31:48 GMT

Yes. Both the parent and child domain classes implemented the Serializable interface. Still got the same error.

Re: Process variable issue in domain classes where one to one relation exists

srikanthkollipa — Tue, 27 Oct 2015 06:54:42 GMT

I am still stuck with this error… Can anyone provide some help on this?

Re: Process variable issue in domain classes where one to one relation exists

vasile_dirla — Tue, 27 Oct 2015 11:07:15 GMT

please upload here a file with the error you see in the log. (pay attention to be long enough in order to have relevant information)
What Activiti version are you using ?

Re: Process variable issue in domain classes where one to one relation exists

srikanthkollipa — Wed, 28 Oct 2015 05:01:16 GMT

Thanks for the response.
I am using the grails activiti plugin of version 5.12.1 which is the latest one.

Attached the error log file and the domain classes.

RequestDetails is the parent domain class.
BiosampleAttributes and RequestStipulations are the child domain classes.

RequestDetails can have one BiosampleAttributes class (one to one).
RequestDetails can have many RequestStipulations class (one to many).

Please let me know if any other information is needed.

Re: Process variable issue in domain classes where one to one relation exists

jbarrez — Wed, 28 Oct 2015 19:27:52 GMT

> I am using the grails activiti plugin of version 5.12.1 which is the latest one.

The Grails plugin has not been developed anymore (isn't from us too). I'd really advise to move to the latest version. 5.12 is really old.

Re: Process variable issue in domain classes where one to one relation exists

vasile_dirla — Thu, 29 Oct 2015 07:52:21 GMT

is your custom type registered into the engine configuration?

try to debug into this method:
<code>
public VariableType findVariableType(Object value) {
    for (VariableType type : typesList) {
      if (type.isAbleToStore(value)) {
        return type;
      }
    }
    throw new ActivitiException("couldn't find a variable type that is able to serialize " + value);
}
</code>

make sure your expected type is into the *typesList* collection.

Re: Process variable issue in domain classes where one to one relation exists

srikanthkollipa — Thu, 29 Oct 2015 11:11:41 GMT

I checked that and it is not coming… Can you please let me know how to register the custom type into engine configuration?

Re: Process variable issue in domain classes where one to one relation exists

jbarrez — Tue, 03 Nov 2015 12:39:13 GMT

You can inject a list of VariableType instances into the 'customPreVariableTypes' and 'customPostVariableTypes' setters. they will come respectively before or after the default types.

Re: Process variable issue in domain classes where one to one relation exists

srikanthkollipa — Mon, 30 Nov 2015 08:18:19 GMT

@jbarrez,

I tried to find out more on this, but couldn't. Can you please point me to an example of injecting a variableType to the custompreVariableTypes.

Thanks,
Srikanth