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【devise】undefined local variable or method `resource_name'の解決策

Posted at 2022-02-18

###解決策　

application_helper

def resource_name
   :user
end

def resource
   @resource ||= User.new
end

def devise_mapping
   @devise_mapping ||= Devise.mappings[:user]
end

こちらのコードをポイっと入れるだけです！
解決！