How To: Simple Devise User Management with Password Reset

Use case: Let's assume you successfully configured Trestle and secured it with Devise and would now like to:

• Create new and update existing users
• Reset the password

Create a Trestle resource app/admin/users_admin.rb:

Trestle.resource(:users) do
  menu do
    group :user_management, priority: :first do
      item :users, icon: "fa fa-users"
    end
  end

  table do
    column :id
    column :email
    column :first_name
    column :last_name
    column :display_name
  end

  # show 2 tabs:
  # * Profile: Edit user/profile details
  # * Password Reset: Just update the password
  form do |resource|
    tab :profile do
      text_field :email
      text_field :first_name
      text_field :last_name
      text_field :display_name
      text_field :display_image
    end

    tab :password_reset do
      password_field :password
      password_field :password_confirmation
    end
  end

  # Remove the password & confirmation from the attributes if they were left blank
  update_instance do |instance, attrs|
    if attrs[:password].blank?
      attrs.delete(:password)
      attrs.delete(:password_confirmation) if attrs[:password_confirmation].blank?
    end

    instance.assign_attributes(attrs)
  end

  # Log back in (may be required after a password update) if the current user was updated
  after_action on: :update do
    if Devise.sign_in_after_reset_password && instance == current_user
      login!(instance)
    end
  end
end