Complete Task Alfreso Rest API - rest

Question

im developing a web application to manage alfresco workflows using Rest api , in my process i have an exclusive gateway with a condition on flow22 as shown in this image :
(if decision variable is equal to 'approve' the process moves to task 3 )
For the first and second task everything works fine except i get this error while completing task2 with Rest, knowing that i already set my variable to approve .
this is my bpm
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/test">
<process id="pres" name="prestation" isExecutable="true">
<startEvent id="startevent1" name="Start" activiti:initiator="${initiator.properties.userName}" activiti:formKey="pfewf:submitHelloWorldTask"></startEvent>
<userTask id="usertask1" name="Remplir formulaire demande" activiti:assignee="${initiator.properties.userName}" activiti:formKey="pfewf:demandepres">
<extensionElements>
<activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
<activiti:field name="script">
<activiti:string><![CDATA[execution.setVariable('pfewf_nomprenomDemA',task.getVariableLocal('pfewf_nomprenomDem'));
execution.setVariable('pfewf_ipDemA',task.getVariableLocal('pfewf_ipDem'));
execution.setVariable('pfewf_organismeDemA',task.getVariableLocal('pfewf_organismeDem'));
execution.setVariable('pfewf_refDemA',task.getVariableLocal('pfewf_refDem'));
execution.setVariable('pfewf_appDemA',task.getVariableLocal('pfewf_appDem'));
execution.setVariable('pfewf_dateDemA',task.getVariable('pfewf_dateDem'));
execution.setVariable('pfewf_typeDemA',task.getVariableLocal('pfewf_typeDem'));
execution.setVariable('pfewf_userDetailsA',task.getVariableLocal('pfewf_userDetails'));
execution.setVariable('pfewf_respTech',task.getVariableLocal('pfewf_respTech'));
execution.setVariable('pfewf_respTechR',task.getVariableLocal('pfewf_respTech'));]]></activiti:string>
</activiti:field>
</activiti:taskListener>
<activiti:taskListener event="create" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
<activiti:field name="script">
<activiti:string><![CDATA[var date = new Date();
var timeInMillisecs = date.getTime();
var ISODate = utils.toISO8601(timeInMillisecs);
var origDate = utils.fromISO8601(ISODate);
execution.setVariable('pfewf_dateDem',origDate);]]></activiti:string>
</activiti:field>
</activiti:taskListener>
<activiti:taskListener event="create" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
<activiti:field name="script">
<activiti:string><![CDATA[execution.setVariable('pfewf_userDetails',task.getVariable('pfewf_userDetails'));]]></activiti:string>
</activiti:field>
</activiti:taskListener>
</extensionElements>
</userTask>
<sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow>
<userTask id="usertask2" name="Responsable technique" activiti:assignee="${pfewf_respTech.properties.userName}" activiti:formKey="pfewf:avisTech">
<extensionElements>
<activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
<activiti:field name="script">
<activiti:string><![CDATA[execution.setVariable('pfewf_nomprenomDemR',task.getVariable('pfewf_nomprenomDemA'));
execution.setVariable('pfewf_ipDemR',task.getVariable('pfewf_ipDemA'));
execution.setVariable('pfewf_organismeDemR',task.getVariable('pfewf_organismeDemA'));
execution.setVariable('pfewf_refDemR',task.getVariable('pfewf_refDemA'));
execution.setVariable('pfewf_appDemR',task.getVariable('pfewf_appDemA'));
execution.setVariable('pfewf_dateDemR',task.getVariable('pfewf_dateDemA'));
execution.setVariable('pfewf_typeDemR',task.getVariable('pfewf_typeDemA'));
execution.setVariable('pfewf_userDetailsR',task.getVariable('pfewf_userDetails'));
execution.setVariable('pfewf_userDetailsA',task.getVariable('pfewf_userDetails'));
execution.setVariable('pfewf_testR',task.getVariable('pfewf_testA'));
execution.setVariable('pfewf_avisRespTech',task.getVariableLocal('pfewf_avisRespTech'));
execution.setVariable('pfewf_respTechR',task.getVariable('pfewf_respTech'));
execution.setVariable('pfewf_remarquesR',task.getVariableLocal('pfewf_remarquesA'));]]></activiti:string>
</activiti:field>
</activiti:taskListener>
</extensionElements>
</userTask>
<sequenceFlow id="flow3" sourceRef="usertask1" targetRef="usertask2"></sequenceFlow>
<userTask id="usertask3" name="Revision demande" activiti:assignee="${initiator.properties.userName}" activiti:formKey="pfewf:revisionDem"></userTask>
<exclusiveGateway id="exclusivegateway1" name="Exclusive Gateway"></exclusiveGateway>
<sequenceFlow id="flow8" sourceRef="usertask2" targetRef="exclusivegateway1"></sequenceFlow>
<sequenceFlow id="flow9" name="a reviser" sourceRef="exclusivegateway1" targetRef="usertask3">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${pfewf_avisRespTech
== 'A Rectifier'}]]></conditionExpression>
</sequenceFlow>
<exclusiveGateway id="exclusivegateway2" name="Exclusive Gateway"></exclusiveGateway>
<sequenceFlow id="flow10" sourceRef="usertask3" targetRef="exclusivegateway2"></sequenceFlow>
<endEvent id="endevent1" name="End"></endEvent>
<sequenceFlow id="flow11" name="annuler" sourceRef="exclusivegateway2" targetRef="endevent1">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${pfewf_decisionR
== 'Annuler'}]]></conditionExpression>
</sequenceFlow>
<sequenceFlow id="flow12" name="renvoyer" sourceRef="exclusivegateway2" targetRef="usertask2">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${pfewf_decisionR
== 'Renvoyer'}]]></conditionExpression>
</sequenceFlow>
<endEvent id="endevent2" name="End"></endEvent>
<sequenceFlow id="flow13" name="refuser" sourceRef="exclusivegateway1" targetRef="endevent2">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${pfewf_avisRespTech
== 'Refuser'}]]></conditionExpression>
</sequenceFlow>
<userTask id="usertask4" name="Avis DHE" activiti:candidateGroups="GROUP_DHE" activiti:formKey="pfewf:dhe">
<extensionElements>
<activiti:taskListener event="create" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
<activiti:field name="script">
<activiti:string><![CDATA[execution.setVariable('pfewf_nomprenomDemD',task.getVariable('pfewf_nomprenomDemA'));
execution.setVariable('pfewf_ipDemD',task.getVariable('pfewf_ipDemA'));
execution.setVariable('pfewf_organismeDemD',task.getVariable('pfewf_organismeDemA'));
execution.setVariable('pfewf_refDemD',task.getVariable('pfewf_refDemA'));
execution.setVariable('pfewf_appDemD',task.getVariable('pfewf_appDemA'));
execution.setVariable('pfewf_dateDemD',task.getVariable('pfewf_dateDemA'));
execution.setVariable('pfewf_typeDemD',task.getVariable('pfewf_typeDemA'));
execution.setVariable('pfewf_userDetailsD',task.getVariable('pfewf_userDetails'));
execution.setVariable('pfewf_testD',task.getVariable('pfewf_testA'));
execution.setVariable('pfewf_nomprenomDemDr',task.getVariable('pfewf_nomprenomDemA'));
execution.setVariable('pfewf_ipDemDr',task.getVariable('pfewf_ipDemA'));
execution.setVariable('pfewf_organismeDemDr',task.getVariable('pfewf_organismeDemA'));
execution.setVariable('pfewf_refDemDr',task.getVariable('pfewf_refDemA'));
execution.setVariable('pfewf_appDemDr',task.getVariable('pfewf_appDemA'));
execution.setVariable('pfewf_dateDemDr',task.getVariable('pfewf_dateDemA'));
execution.setVariable('pfewf_typeDemDr',task.getVariable('pfewf_typeDemA'));
execution.setVariable('pfewf_userDetailsDr',task.getVariable('pfewf_userDetails'));
execution.setVariable('pfewf_testDr',task.getVariable('pfewf_testA'));]]></activiti:string>
</activiti:field>
</activiti:taskListener>
</extensionElements>
</userTask>
<sequenceFlow id="flow14" name="valider" sourceRef="exclusivegateway1" targetRef="usertask4">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${pfewf_avisRespTech
== 'Valider'}]]></conditionExpression>
</sequenceFlow>
<userTask id="usertask5" name="Avis DRSM" activiti:candidateGroups="GROUP_DRSM" activiti:formKey="pfewf:drsm"></userTask>
<sequenceFlow id="flow15" sourceRef="usertask4" targetRef="usertask5"></sequenceFlow>
<endEvent id="endevent3" name="End"></endEvent>
<sequenceFlow id="flow16" sourceRef="usertask5" targetRef="endevent3"></sequenceFlow>
</process>
<bpmndi:BPMNDiagram id="BPMNDiagram_pres">
<bpmndi:BPMNPlane bpmnElement="pres" id="BPMNPlane_pres">
<bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
<omgdc:Bounds height="35.0" width="35.0" x="310.0" y="323.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1">
<omgdc:Bounds height="71.0" width="112.0" x="400.0" y="305.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="usertask2" id="BPMNShape_usertask2">
<omgdc:Bounds height="65.0" width="105.0" x="558.0" y="308.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="usertask3" id="BPMNShape_usertask3">
<omgdc:Bounds height="55.0" width="105.0" x="688.0" y="461.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="exclusivegateway1" id="BPMNShape_exclusivegateway1">
<omgdc:Bounds height="40.0" width="40.0" x="720.0" y="321.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="exclusivegateway2" id="BPMNShape_exclusivegateway2">
<omgdc:Bounds height="40.0" width="40.0" x="590.0" y="468.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
<omgdc:Bounds height="35.0" width="35.0" x="480.0" y="471.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="endevent2" id="BPMNShape_endevent2">
<omgdc:Bounds height="35.0" width="35.0" x="723.0" y="220.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="usertask4" id="BPMNShape_usertask4">
<omgdc:Bounds height="55.0" width="105.0" x="805.0" y="314.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="usertask5" id="BPMNShape_usertask5">
<omgdc:Bounds height="55.0" width="105.0" x="955.0" y="314.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="endevent3" id="BPMNShape_endevent3">
<omgdc:Bounds height="35.0" width="35.0" x="1105.0" y="324.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
<omgdi:waypoint x="345.0" y="340.0"></omgdi:waypoint>
<omgdi:waypoint x="400.0" y="340.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">
<omgdi:waypoint x="512.0" y="340.0"></omgdi:waypoint>
<omgdi:waypoint x="558.0" y="340.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow8" id="BPMNEdge_flow8">
<omgdi:waypoint x="663.0" y="340.0"></omgdi:waypoint>
<omgdi:waypoint x="720.0" y="341.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow9" id="BPMNEdge_flow9">
<omgdi:waypoint x="740.0" y="361.0"></omgdi:waypoint>
<omgdi:waypoint x="740.0" y="461.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="16.0" width="48.0" x="752.0" y="390.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow10" id="BPMNEdge_flow10">
<omgdi:waypoint x="688.0" y="488.0"></omgdi:waypoint>
<omgdi:waypoint x="630.0" y="488.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow11" id="BPMNEdge_flow11">
<omgdi:waypoint x="590.0" y="488.0"></omgdi:waypoint>
<omgdi:waypoint x="515.0" y="488.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="16.0" width="42.0" x="532.0" y="500.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow12" id="BPMNEdge_flow12">
<omgdi:waypoint x="610.0" y="468.0"></omgdi:waypoint>
<omgdi:waypoint x="610.0" y="373.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="16.0" width="48.0" x="615.0" y="431.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow13" id="BPMNEdge_flow13">
<omgdi:waypoint x="740.0" y="321.0"></omgdi:waypoint>
<omgdi:waypoint x="740.0" y="255.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="16.0" width="39.0" x="752.0" y="296.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow14" id="BPMNEdge_flow14">
<omgdi:waypoint x="760.0" y="341.0"></omgdi:waypoint>
<omgdi:waypoint x="805.0" y="341.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="16.0" width="100.0" x="760.0" y="341.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow15" id="BPMNEdge_flow15">
<omgdi:waypoint x="910.0" y="341.0"></omgdi:waypoint>
<omgdi:waypoint x="955.0" y="341.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow16" id="BPMNEdge_flow16">
<omgdi:waypoint x="1060.0" y="341.0"></omgdi:waypoint>
<omgdi:waypoint x="1105.0" y="341.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
</bpmndi:BPMNPlane>
</bpmndi:BPMNDiagram>
</definitions>
How can i deal with exclusivegateways through Rest api ?
Thank you in advance.

Answer 1

I strongly doubt that the decision variable is already set, after completing task2 you can check the value of the variable by calling this endpoint:
GET /tasks/{taskId}/variables
To set variables before completing a task you have to do it like this
URL:
PUT /tasks/{taskId}?select=state,variables
Request body:
{
"state": "completed",
"variables": [
{
"name": "decision",
"type": "d_text",
"value": "approve",
"scope": "global"
}
]
}

Answer 2

There are many solutions:
You can use this condition in your flow14 "${pfewf_avisRespTech != 'Refuser' && pfewf_avisRespTech != 'A Rectifier'}".
In your model set the default value of pfewf_avisRespTech as "Valider" for example
Before asking workflow engine to complete your task, ask him to update the value of your pfewf_avisRespTech
In the complete listener of task2 check the value of "pfewf_avisRespTech" if it's equal to "" or null gives it some value.