How to know which issue fields are text types?

Question

I'm automating JQL query generation for searching any group of Issues based on any field an Issue could have.

I generate the JQL string using the EQUALS ('=') operator. The text fields don't support that operator. For those I have to use CONTAINS ('~'). But the problem is that I don't know the name of the issue fields that support one or other.

Using the JIRA REST API, how can I check or know which issue fields support which operators in an automated way?
How can I know wich issue fields are text fields or not?

PD: I know that I could generate manually an array that contained the issue fields that are text fields. But I want It to be fully automatic. Using the JIRA REST API .

Ravi Sagar _Sparxsys_ · Accepted Answer

Hi @Ricard Juan Pujol

Interesting what you are doing.

Try this: /rest/api/2/jql/autocompletedata

Ravi

Ricard Juan Pujol · Accepted Answer

There's also another solution I finally came with:

The operator CONTAINS('~') is allowed for fields of type string while the operator EQUALS('=') is allowed in anything else that is not a string.

You can check if a parameter is a string type or not, accessing the '/rest/api/2/field' resource.