While Customizing text in Discourse or Customizing specific email templates you may have noticed that there are placeholder variables available in some templates. In Discourse we call these Interpolation Keys.
Example of Interpolation Keys for the Account Created
email template:
These placeholders can be moved around within the template they belong to, but they are only available in that template and cannot be moved around to different templates, as they are all backed by server code that’s to the corresponding template.
However, there are some additional Interpolation Keys allowed in text and email templates that you can find listed here: ALLOWED_CUSTOM_INTERPOLATION_KEYS
You can use all system_messages.welcome_user
keys in text and email template customizations as long as they have subject_template
and text_body_template
subkeys - Because all of them should be handled by the SystemMessage
class which adds username, name, name_or_username
as additional interpolation keys. See system_message.rb for the related Discourse code.