How to get the REST API structure for a custom field?

[Mark]

I am preparing a PowerShell script to generate an issue. The error I got is:

"errorMessages":[],"errors":{"Application":"data was not an array"}}

The "Application" field (customfield_11040) is a dropdown menu allowing multiple selection. The values are "HR system","IT system","Purchasing system" etc.

My Powershell compose the json body like below:

$messageBody = @{
 fields = @{
 project = @{
 key = "IT"
 }
 summary = "test create issue"
 description = "Creating of an issue using project keys and issue type names using the REST API"
 issuetype = @{
 name = "Bug"
 }
 customfield_11043 = @{ 
 name="test" 
 }
 
 #application field
 customfield_11040 = @{
 Application="HR system"
 }
 }
}

Please advice how can I check the structure of customfield_11040?

[Alexey Matveev · Accepted solution]

Hello,

You can find an answer here:

https://developer.atlassian.com/server/jira/platform/jira-rest-api-examples/#creating-an-issue-examples

There are examples for all custom field types.

[Mark]

How can I get customfield_11040's field type?

The error returned is weird

":{"Application":"data was not an array"}}

it is not returning :

":{"customfield_11040":"data was not an array"}}

Also, I tried to input the data as "array" . Is the error trying to tell me I should not use Array?

[Alexey Matveev]

It means that you did not provide an array. I gave an example, can you provide here your final json?

[Mark]

Here is part of JSON I "post" to JIRA:

"description":  "Creating of an issue using project keys and issue type names using the REST API",
"customfield_11040":  {
                          "id":  "11521"
                      },

and error returned:

{"errorMessages":[],"errors":{"Application":"data was not an array"}}

Then I have another try with follow JSON:

"customfield_11040":  "[ {\"value\": \"EPM\" }, {\"value\": \"ADM\" }] ",

and error returned exactly the same.

[Alexey Matveev]

Your JSON should be like this:

{"fields":{"customfield_11040":  [ {"value": "EPM" }, {"value": "ADM" }]}}

[Mark]

Thanks Alexey. I missed the bracket before. I can now POST successfully.

[Yatish Madhav]

Posted an update here as well related to this: https://community.atlassian.com/t5/Marketplace-Apps-Integrations/PHP-REST-API-and-Multi-checkboxes/qaq-p/325853#U1430338

[Mark]

I print out the JSON structure for my POST:

{
"fields": {
"issuetype": {
"name": "Bug"
},
"description": "Creating of an issue using project keys and issue type names using the REST API",
"customfield_11040": {
"application": "HR system"
},
"customfield_11043": {
"name": "test"
},
"summary": "test create issue",
"project": {
"key": "TEST"
}
}
}