Like most Ruby developers you have to set a default_url_options on a Ruby on Rails project. Depending on the use case you have to set several of them with different values.
The name of the method default_url_options is the same, but it is used in different contexts (controller, nail, or file storage), it may be confusing and can even have side effects for your project you have to figure out yourself. Depending on the value you set, they may be reused in other contexts like ActiveStorage, ActionMail, and third-party gems like devise. I couldn’t find any official documentation for the most common cases (web, mail, file storage, test), I’ve written one.
Read the whole post on my site: Default URL Options in Ruby on Rails
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