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I have a field named "gateway_url" and in CMS admin pages this will appear with a select button next to it, as it has a custom field representation associated with it. However, in "edit" mode, I want this field as "readonly", but the select button still appears when readonly is defined. I don't want to rename the field, so how could I avoid this button appearing?
My goal is to show the value of gateway_url, but not allow it to be re-edited after creation.