To follow on from the people who are asking about the error Could not find devise mapping for path "/"
there is a workaround.
You'll find that there is a clue in your logs which will probably say:
[Devise] Could not find devise mapping for path "/".
This may happen for two reasons:
1) You forgot to wrap your route inside the scope block. For example:
devise_scope :user do
match "/some/route" => "some_devise_controller"
end
2) You are testing a Devise controller bypassing the router.
If so, you can explicitly tell Devise which mapping to use:
@request.env["devise.mapping"] = Devise.mappings[:user]
So I retried the approach but instead wrapping it (as @miccet suggets) inside a scope block:
devise_scope :user do
root to: "devise/sessions#new"
end
This worked fine for me
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