What is the name of the input variable which contains the documents for an operation?

Michael_Bell — Sun, 13 May 2012 22:39:02 GMT

I want to use the result from Document.GetChildren to calculate a dynamic folder name. My idea is that MVEL provide the length of an array via the object method size.

The problem is that I cannot find the right variable which contain the output documents. I know that an operation can return a list of documents or a reference to a list of documents. Nevertheless I don't find the correct variable name ;(

<?xml version="1.0"?>
  <component name="org.nuxeo.dev.cookbook.example.pap.process-request.chains">

    <extension target="org.nuxeo.ecm.core.operation.OperationServiceComponent" point="chains">

      <chain id="CreateDevCookbookExamplePapProcessRequest">
        <!--
          Input: Called from the folder with all requests
          Calculate a name for the new folder
          Create folder with title
          Create customer_form
          Open customer form
        -->
        <!-- get the folder as input -->
        <operation id="Seam.AddErrorMessage">
          <param type="string" name="message">Cannot load the folder with the requests.</param>
        </operation>
        <!-- usually unnecessary -->
        <operation id="Context.FetchDocument">
        </operation>
        <!-- determine number of children -->
        <operation id="Seam.AddErrorMessage">
          <param type="string" name="message">Cannot calculate the name of the new file.</param>
        </operation>
        <operation id="Context.SetInputAsVar">
          <param type="string" name="name">requests</param>
        </operation>
       <operation id="Document.GetChildren">
       </operation>
       <operation id="Context.SetVar">
         <param type="string" name="name">form_name</param>
         <!--
           here  I want to calculate a dynamic new file name
           BUT:  I cannot access the document list from GetChildren.
           BUT:  It looks like all variable names are unknown.
           MVEL: documents.size (should be the length of the list)
         -->
         <param type="object" name="value">expr:@{Documents.size}</param>
       </operation>

The error messages always look like this one:

Caused by: [Error: could not access: Documents; in class: null]
[Near : {... Unknown ....}]

The example is from the tutorial which I prepare for the Dev Cookbook.

Re: What is the name of the input variable which contains the documents for an operation?

Laurent_Doguin — Mon, 14 May 2012 11:48:07 GMT

Hi Michael,

I manage to do it by first setting the input of the getChildren operation as a context variable. Here's a screenshot of my example:

Re: What is the name of the input variable which contains the documents for an operation?

Michael_Bell — Mon, 14 May 2012 12:40:15 GMT

Hi Laurent,

topic What is the name of the input variable which contains the documents for an operation? in Nuxeo Forum

What is the name of the input variable which contains the documents for an operation?

Re: What is the name of the input variable which contains the documents for an operation?

Re: What is the name of the input variable which contains the documents for an operation?