rest api starting a process ,getting back 400

[rascaly2k]

Hi I am trying to start a process , with the key name approvalProcess

I am using Adavance rest client chrome to test the service

To see if its deployed and available

I use

method : get 
http://localhost:8081/activiti-rest/service/repository/process-definitions?key=approvalProcess

output: Status 200 OK
{
data: [1]
0:  {
id: "approvalProcess:1:11580"
url: "http://localhost:8081/activiti-rest/service/repository/process-definitions/approvalProcess:1:11580"
key: "approvalProcess"
version: 1
name: "Page Approval Process"
description: null
deploymentId: "11577"
deploymentUrl: "http://localhost:8081/activiti-rest/service/repository/deployments/11577"
resource: "http://localhost:8081/activiti-rest/service/repository/deployments/11577/resources/Page Approval Process.bpmn20.xml"
diagramResource: "http://localhost:8081/activiti-rest/service/repository/deployments/11577/resources/Page Approval Process.approvalProcess.png"
category: "http://activiti.org/bpmn20"
graphicalNotationDefined: false
suspended: false
startFormDefined: false
}-
-
total: 1
start: 0
sort: "name"
order: "asc"
size: 1
}
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So I know its deployed , but when I try to start with with parameters its gives a bad requests and i don't know what to do . People else where suggested that the contype might not be set , I did that . But no cigar . Would some kind soul shed some light

method: post
url:http://localhost:8081/activiti-rest/service/runtime/process-instances

header
Authorization:Basic a2VybWl0Omtlcm1pdA==
Accept:application/json
Content-Type:application/json

body
{
   "processDefinitionKey":"approvalProcess",
   "variables": [
      {
       "type":"page",
       "typeId":"123"
      }
   ]}

Status
400 Bad Request
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Any suggestions , would greatly be appreciated
Thankx in advance
-

[jbarrez]

the type 'page' is something Activiti does not know.

Did you try it without the variables property?

[mignet]

I have also met this issue in Activiti 5.17.0,I follow the user guide and test Rest API "15.5.4. Start a process instance" with RestClient.post body like this:
<code>
{
   "processDefinitionId":"oneTaskProcess:1:158",
   "businessKey":"myBusinessKey",
   "variables": [
      {
        "name":"myVar",
        "value":"This is a variable",
      }
   ]
}
</code>
response result:<code>

HTTP Status 400 -

type Status report

message

description The request sent by the client was syntactically incorrect.
Apache Tomcat/7.0.57
</code>
when I remove variables and test again,
<code>
{
   "processDefinitionId":"oneTaskProcess:1:158",
   "businessKey":"myBusinessKey"
}
</code>
I got a 500 error like this:
<code>
HTTP Status 500 - Request processing failed; nested exception is org.activiti.engine.ActivitiException: Unknown property used in expression: ${person.id}
</code>
now,I found that starting a process without process variables is ok,but the process with variables can't.Why?

[mignet]

Solved!the variables have a special format with a name/value pair.
here is my post body:
<code>
{
    "processDefinitionId": "vacationRequest:1:33",
    "variables": [
        {
            "name": "employeeName",
            "value": "Miss Piggy"
        },
        {
            "name": "numberOfDays",
            "value": "10"
        },
        {
            "name": "startDate",
            "value": "2011-01-11"
        },
        {
            "name": "returnDate",
            "value": "2011-01-11"
        },
        {
            "name": "vacationMotivation",
            "value": "tired"
        }
    ]
}
</code>
Everything is All Right!