Retrieving Form Data with kie server rest api

[rodrigo.burdet]

Hello. Im working on a UI to work with BPM processes / tasks. To accomplish this, im using kie server REST API.

The problem im facing is that i cant get the necessary form data to make my own form to start a new process.

This happens because an api call to http://{server}/kie-server/services/rest/server/containers/{container}/forms/processes/{pId}?filter=true doesnt bring subforms information, neither dataHolder's values if the values are custom types.

Is there a workaround to this problem using the kie rest api?

Im using BPM 6.4 on EAP 6.4

Best Regards

[diego-torres]

Hello Rodrigo.

Please look at this implementation:

GitHub - diego-torres/subform-ticket: jBpm get sub-form demo.

And let me know if your implementation is somehow different or if it works for you.

[dmarrazzo]

Hello Rodrigo,

are serializable your custom type?

can you provide a reproducer?

[rodrigo.burdet]

Your example works for me. But when i try to add another subform in the same parent form, your solution does not work.

In your example i added a IssueList subform and the response i get:

{

  "form": {

    "dataHolder": [

      {

        "id": "issueList",

        "inputId": "",

        "name": "#E9E371",

        "outId": "issueLIst",

        "type": "dataModelerEntry",

        "value": "org.acme.ticket_support.IssueList"

      },

      {

        "id": "ticket",

        "inputId": "",

        "name": "#E9E371",

        "outId": "ticket",

        "type": "dataModelerEntry",

        "value": "org.acme.ticket_support.Ticket"

      }

    ],

    "displayMode": "default",

    "field": [

      {

        "defaultSubform": "component-ticket.form",

        "errorMessage": ",,,,,,,,",

        "fieldClass": "java.lang.Object",

        "fieldRequired": false,

        "groupWithPrevious": false,

        "id": 1575399852,

        "inputBinding": "ticket",

        "label": ",,,Subform2,ticket,,,,",

        "name": "ticket",

        "outputBinding": "ticket",

        "position": 0,

        "readonly": false,

        "title": ",,,,,,,,",

        "type": "Subform"

      },

      {

        "addItemText": ",,,,,,,,",

        "bag-type": "org.acme.ticket_support.Issue",

        "cancelItemText": ",,,,,,,,",

        "defaultSubform": "issue-subform.form",

        "deleteItems": true,

        "enableTableEnterData": false,

        "errorMessage": ",,,,,,,,",

        "expanded": false,

        "fieldClass": "java.util.List",

        "fieldRequired": false,

        "hideCreateItem": false,

        "id": 272361770,

        "label": "SSClass,SSStyle,,,,issueList (issueList),,,,,",

        "name": "issueList_issueList",

        "newItemText": ",,,,,,,,",

        "outputBinding": "issueLIst/issueList",

        "position": 1,

        "previewSubform": "issue-subform.form",

        "readonly": false,

        "tableSubform": "issue-subform.form",

        "title": ",,,,,,,,",

        "type": "MultipleSubform",

        "updateItems": true,

        "visualizeItems": true

      }

    ],

    "id": 1417469681,

    "name": "ticket-support.support-taskform.form",

    "status": 0

  }

}

Which still hides subform information

[rodrigo.burdet]

Dear Donato. No, my custom type is not serializable. But a curious fact is that having only one subform with non-serializable data works well. Adding another subform breaks the hole thing.

Regards

[rodrigo.burdet]

Here is an implementation with 2 subforms that doesnt work

GitHub - NickCis/subform-ticket: jBpm get sub-form demo.

[diego-torres]

I am observing this few things:

1. In the EAP log I found the following error logged by the kie-server:

2017-03-15 15:26:13,461 ERROR [stderr] (default task-57) java.lang.NullPointerException
2017-03-15 15:26:13,462 ERROR [stderr] (default task-57) at org.kie.server.services.jbpm.ui.form.InMemoryFormProvider.filterXML(InMemoryFormProvider.java:214)
2017-03-15 15:26:13,462 ERROR [stderr] (default task-57) at org.kie.server.services.jbpm.ui.form.InMemoryFormProvider.render(InMemoryFormProvider.java:87)...


Is that something you can also see?

2. I add fields "by origin", as the inbound/outbound linking is made automatically for me I don't have to further change that. I am observing that you are adding fields "by type" and then adding the properties to tie them to inbound/outbound variable mappings right?

By the log it seems to be missing a reference to the "outboundBinding", but I will keep researching how that is getting missed because as far as I can see to this moment, all configurations are in place for inbound/outbound.