Jira Python: 'customfield_15400' cannot be set. It is not on the appropriate screen, or unknown.

[VTS]

Hello, 

I am trying to create an issue in my project with some custom fields, via the python jira API. I need to use some custom fields to store some info. 

If I create an issue via the following, everything works great

def createIssue(self):
    issue_dict = {
        'project': {'key': 'GLOB'},
        'summary': 'New issue from jira-python',
        'description': 'Look into this one',
        'issuetype': {'name': 'Bug'},
    }
    self.__client.create_issue(fields=issue_dict)

But, when I introduce a custom field, everything breaks

def createIssue(self):
    issue_dict = {
        'project': {'key': 'GLOB'},
        'summary': 'New issue from jira-python',
        'description': 'Look into this one',
        'issuetype': {'name': 'Bug'},
        'customfield_15400': {'value' : 'NO'}

    }
    self.__client.create_issue(fields=issue_dict)

And I get the following error:

Field 'customfield_15400' cannot be set. It is not on the appropriate screen, or unknown.

Does anyone know how to overcome this? Thanks! 

[Nic Brough -Adaptavist- · Accepted solution]

You need to do what it suggests - ensure that custom field is on the "create" screen for the issue type for that project.

Try logging in as normal and creating a Bug in project Glob - do you see the custom field?  I suspect you will not, because it needs to be added.

[VTS]

I actually created a test field for Bugs in my workspace called "Test", which is a custom Text Field.

If I create a Bug through the UI, it successfully fills my custom field and is a bug ticket is able to be created. This issue only happens when using the Python API. 

If I try the following,

def createIssue(self):
    issue_dict = {
        'project': {'key': 'GLOB'},
        'summary': 'New issue from jira-python',
        'description': 'Look into this one',
        'issuetype': {'name': 'Bug'},
        'test': {'value' : 'NO'}

    }
    self.__client.create_issue(fields=issue_dict)

It does not work, and throws the aforementioned error. 

[Nic Brough -Adaptavist-]

What field is customfield_15400?

[VTS]

Turns out it was a permissions issue. Thanks for the help! :) 

[Deleted user]

Could you explain about the permissions issue, please? Is there an explicit permission to modify custom fields?

I am using the same user for UI and API. I successfully create an issue with specifying the custom field via UI , but getting an error when using API.

[Nic Brough -Adaptavist-]

No there's no field permissions, VTS must mean that the account running the REST call did not have "edit issue" rights.

What error are you getting and what type of field is it?