I need to know the column name in jira for a custom field

[shubham]

I am trying to form the URL for the REST API call to get all the tickets from a specific project which has severity(a custom field) as Minor.

As per the link - 

https://developer.atlassian.com/server/jira/platform/jira-rest-api-examples/

I can get all the tickets for a specific project like - 

https://xyz.atlassian.net/rest/api/latest/search?jql=project=DT

When I am adding custom field, it is not filtering further -

https://xyz.atlassian.net/rest/api/latest/search?jql=project=DT&cf[12664]=Minor

Can someone tell what am I doing wrong here. 

[Fazila Ashraf · Accepted solution]

@shubham  , i think you should be trying like

https://xyz.atlassian.net/rest/api/latest/search?jql=project=DT%20and%20cf[12664]=Minor

[shubham]

Thankyou Fazila, it worked. Just a question though, why is that "%20and%20" and "&" does not work here?

[Fazila Ashraf]

@shubham  , because a jql search is expected here and  '&'  do not work for JQL. The proper logical operator is 'and'.

And i think you were using & as you got confused with the documentation where they asked to use & to get the field values as columns for those matching issues.

If the answer helps, you can choose to accept the answer to get the other users get to this quickly