Change request management using REST API -not able to move the state of change request with rest api

[strbrindha]

I'm trying to automate the change request creation till closure of change request.

I created a change request using REST API in PowerShell, now I'm trying to update the status from new to assess. when using update record in flow designer, I can update the change request status to assess. but the same is not happening using REST API.

this is the body of the call I'm trying to make,

{

    "work_notes":"testing",

    "state":"-3",  // state -3  

}

Method: Put

URL: https://instance.service-now.com/api/now/table/change_request/<change_request_sys_id>

[strbrindha · Accepted solution]

The issue is resolved now. Following are the step-by-step process from creating a normal change request to moving the change request to closure.

As given in the below document make sure you uncheck the override read only and read-only fields for state field(field in change_reqest table) in servicenow.

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0718066

and uncheck the read-only field for u_change_review field(field in change_reqest table) also.

Creation of change request:

Body:    

   {

"short_description" : "test_short_description",

    "description" : "test_desc",

    "start_date" :  "2024-07-10 04:00:00", //"YYYY-MM-DD HH:mm:SS" 

    "end_date" : "2024-08-12 04:32:00", //"YYYY-MM-DD HH:mm:SS"    

    "assignment_group" : "test_assignment_group",

    "cmdb_ci" : "test_cmdb_ci",

    "reason" : "Business requirements",

    "type" : "normal", //make sure you are giving normal instead of Normal

    "u_change_owner" : "test_assignment_group",

    "justification" : "test_justification",

    "implementation_plan" : "test_implementation_plan",

    "risk_impact_analysis" : "test_risk_impact_analysis",

    "backout_plan" : "test_backout_plan",

    "test_plan" : "test_plan",

    "change_plan" : "test_change_plan",

    "u_gxp_sensitive" : "no"

}

URL: https://<<dev.service-now.com>>/api/now/table/change_request

Method: Post

After creating change request, using rest API add affected CIs, create closure requirements and close the necessary change tasks.

Post that move the change request from new to assess

Body:

{

"state":"-4", // -4 - code for assess,

"work_note":"moving the state to assess"

}

URL: https://<<dev.service-now.com>>/api/now/table/change_request/<change_request_sys_id>

Method: Put

Now change request will be in Assess state.

post the necessary approval, change request will be moved to Authorize state.

Now we have to move the state to implement by following PUT requests.

1. updating the u_change_review to 'preReview' by passing following body

Body:

{

    "work_note":"Implmented on Dev and QA ",

    "u_change_review":"DevImplemented"

}

URL: https://<<dev.service-now.com>>/api/now/table/change_request/<change_request_sys_id>

Method: Put

2. now again update the u_change_review to 'postReview'

Body:

{

    "work_note":"moving the state to Authorize",

    "u_change_review":"postReview"

}

URL: https://<<dev.service-now.com>>/api/now/table/change_request/<change_request_sys_id>

Method: Put

Change request will be in implement state, now it has to be moved to Review state

Body:

{

"close_code":"successful",

"work_start":"2024-07-12 04:00:00",

"work_end":"2024-07-14 06:00:00",

"phase":"accept",

"state":"0" // code for review state

}

Now change request is in Review state, it will be moved to approval group by passing following body

Body:

{

        "work_notes":"sending for approval in review state",

        "u_change_review":"postReview"

}

URL: https://<<dev.service-now.com>>/api/now/table/change_request/<change_request_sys_id>

Method: Put

Now post the approval, it will be moved to Closed state

Note: Choice field values are dependant upon individual scenario.