how to change jira status by transition with REST API?

[pillow]

i tried to change status as a field,but not work,and i see we need to change the status by transition.

but i do't understand the schema .

for example,i want to transition my issue from to do to doing,how should i send the params?

[Thiago Masutti]

Hi @pillow 
Welcome to the Atlassian Community.

Here's an example based on https://docs.atlassian.com/software/jira/docs/api/REST/8.20.1/#issue-doTransition .

See possible transitions:

GET <Jira-BaseURL>/rest/api/2/issue/<Issue-Key>/transitions

Transition an issue to a selected Workflow status (transition is made by ID and not name):

POST <Jira-BaseURL>/rest/api/2/issue/<Issue-Key>/transitions
{
   "transition": {
     "id": "21"
   }
}

Kind regards,
Thiago Masutti

[pillow]

i have read the doc,but i can't understand the schema.

what's the role of the parameters? what's the range of update,just comment?

and i can't find the transition id list. is it the actionId of every transition which declare in workflow?