What about it isn't working? Have you followed the instructions carefully in my below reply?

www.joomlapolis.com/forum/153-professional-member-support/236285-substring-search-in-cb-query-field-how-to-get-this-method#292473

You need to use CB Auto Actions to output the necessary jQuery to force a select element to select2. I recommend using the field specific approach using the below jQuery as shown in the above topic.


you will need to replace FIELD_NAME with the name of your field. As for your question in the topic it self the supplied jQuery goes in the Code parameter.

You're missing the jQuery plugin usage. You need to be using exactly the below in your Code action.

Global
Triggers: onBeforeRegisterFormDisplay, onBeforeUserProfileEditDisplay
Type: Code
User: Automatic
Access: Everybody
Action
Method: jQuery
Code:Plugins: cbselect

The only thing you'll need to change is replace FIELD_NAME with the actual name of your field. For example if the name of my field is cb_select I'd use the below. Note if the select is a multiselect then you need to add __ after the field name.


You can try the below instead if that's not working for you.


Replace FIELD_ID with the ID of your field. I've confirmed both of the above usages are working fine.

Not sure where this goes - I have it in the select field under the tab integrations/cb code field:

Please read the topic carefully. It says to use that code instead of the code above it if you want the select2 usage to apply to all select fieldtypes instead of a specific field.