timeoverflow/app/admin/user.rb

ActiveAdmin.register User do
  config.batch_actions = true

  action_item :upload_csv, only: :index do
    link_to I18n.t("active_admin.users.upload_from_csv"), action: "upload_csv"
  end

  action_item :confirm, only: :show do
    unless user.confirmed?
      link_to I18n.t("active_admin.users.confirm_user"),
              confirm_admin_user_path(user),
              method: :put
    end
  end

  collection_action :upload_csv do
    render "admin/csv/upload_csv"
  end

  collection_action :import_csv, method: :post do
    errors = UserImporter.call(params[:dump][:organization_id], params[:dump][:file])
    flash[:error] = errors.join("<br/>").html_safe if errors.present?

    redirect_to action: :index
  end

  member_action :confirm, method: :put do
    resource.skip_confirmation!
    if resource.save
      redirect_to admin_user_path(resource), notice: I18n.t("active_admin.users.confirmed_notice")
    else
      redirect_to admin_user_path(resource), alert: resource.errors.full_messages.to_sentence
    end
  end

  scope :all
  scope :without_memberships

  index do
    selectable_column
    column do |user|
      link_to image_tag(avatar_url(user, 24)), admin_user_path(user)
    end
    column :username
    column :email
    column :organizations do |u|
      u.organizations.map(&:to_s).join(", ")
    end
    column :posts do |u|
      u.posts.count
    end
    column :confirmed_at
    column :created_at
    actions
  end

  filter :organizations
  filter :email
  filter :username
  filter :phone
  filter :postcode
  filter :locale
  filter :created_at

  form do |f|
    f.semantic_errors *f.object.errors.attribute_names
    f.inputs do
      f.input :username
      f.input :email
      f.input :phone
      f.input :postcode
      f.input :gender, as: :select, collection: User::GENDERS
      f.input :locale, as: :select, collection: I18n.available_locales
      f.input :password, required: false, input_html: { autocomplete: "new-password" }
      f.input :password_confirmation, required: false, input_html: { autocomplete: "new-password" }
      f.input :confirm_immediately, as: :boolean if f.object.new_record?
    end
    f.inputs "Memberships" do
      f.has_many :members, allow_destroy: true do |m|
        m.input :organization, collection: Organization.order(id: :asc).pluck(:name, :id)
        m.input :active
        m.input :manager
      end
    end
    f.actions
  end

  show do |u|
    columns do
      column do
        attributes_table *default_attribute_table_rows
      end
      column do
        panel "Avatar" do
          image_tag avatar_url(u, 160)
        end
        panel "Memberships" do
          table_for user.members do
            column :organization
            column :active do |member|
              "✔" if member.active
            end
            column :manager do |member|
              "✔" if member.manager
            end
            column :entry_date
            column :member_uid
            column :tag_list
          end
        end
      end
    end
  end

  permit_params :username, :email, :phone, :postcode, :gender, :locale, :confirm_immediately,
    :password, :password_confirmation,
    members_attributes: [:id, :organization_id, :active, :manager, :_destroy]

  controller do
    def create_resource(obj)
      obj.skip_confirmation! if obj.confirm_immediately
      super
    end

    def update_resource(obj, attributes)
      if attributes.first[:password].blank?
        attributes.first.delete(:password)
        attributes.first.delete(:password_confirmation)
      end
      super
    end
  end
end