limit character on custom field

I have a text custom field and would like to limit it to 70 characters or less. Is there a way to do this so whenever this field is present on any screen it only allows 70 chars?

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if you have Adaptivist Scriptrunner you can develop a behavior or validator. If you do not have Scriptrunner you can download JsIncluder plugin ( and write custom javascript for create,  edit and view screen. 

Hello Alexey,

I currently use a regex validator in the workflow as follows:
[A-Z a-z 0-9 ,.-]{1,70}$

However I dont like this method. Also the error message is ugly (See attached).



OK.  It s also a solution :)

I will also try it.  Thank you

Ok. Still looking for a better way to do it.

Found it here:


I am using behavior plugin

def field = getFieldByName("My Field Name")
if ((field?.value as String)?.length() > 70) {
field.setError("Length of the field should be less than 70 chars")
} else {

Hello.  You can resolve this by adding a regular expression check to the workflow transition.  Much simpler than a groovy script.


Go to Project Setting > Workflows

Edit the workflow for the affected issue type

Switch to Diagram mode

On Create transition, click on the Validators

Choose Add Validator > Regular Expression Check


If you would like to restrict the field to a specific length:  enter [0-9]{n}$


(n) reflects your desired field length.

Neither of these options stop a user from changing the field AFTER doing the transition though as they both depend on a transition validation.

I was looking for something similar and it seems that if we can't absolutely stop a field EVER being longer than a certain length then there is little point restricting it SOMETIMES.

Ah, correction. It seems that BEHAVIOURS do apply at all times - looking into that now.

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