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31 lines
1.2 KiB
Markdown
31 lines
1.2 KiB
Markdown
# Set default_url_options For Entire Application
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There are a [number of
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ways](https://github.com/rails/rails/issues/29992#issuecomment-575464112) to
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set `default_url_options` for the various modules that need them. While the
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development server can infer URL options for the most part, it needs them
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explicitly defined for `ActionMailer`. You may also see the `ArgumentError:
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Missing host to link to! Please provide the :host parameter, set
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default_url_options[:host], or set :only_path to true` error when using a URL
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helper. That's because the `routes` config also needs to know.
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Instead of cobbling together default settings in several different places as
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the issues arise, you can define them application-wide like so:
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```ruby
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# config/environments/development.rb
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Rails.application.default_url_options = { host: 'localhost', port: 3000 }
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Rails.application.configure do
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# ...
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end
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```
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Add the `default_url_options` to `Rails.application` just outside of the
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standard `configure` block in each of your environment config files. Now
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everything should know how to generate full URLs.
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Note: I've tested this out in a Rails 6.1 application.
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[source](https://discuss.rubyonrails.org/t/define-host-so-absolute-urls-work-in-development-and-test/75085/10)
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