Redmine

  include MembersHelper

    @members = scope.includes(:principal, :roles).order(:id)

      format.api do

        @offset, @limit = api_offset_and_limit

        @member_count = scope.count

        @member_pages = Paginator.new @member_count, @limit, params['page']

        @offset ||= @member_pages.offset

        @members = @members.limit(@limit).offset(@offset).to_a

      end

      format.csv do

        send_data(members_to_csv(@members), type: 'text/csv; header=present', filename: "#{@project.identifier}-members.csv")

      end

  def members_to_csv(members)

    Redmine::Export::CSV.generate(encoding: params[:encoding]) do |csv|

      # csv headers

      csv << ['', l(:label_role), l(:field_principal), l(:label_project)]

      # csv lines

      members.each do |member|

        member.roles.each do |role|

          csv << [

            member.principal.name,

            role.name,

            member.principal.is_a?(Group) ? l(:label_group) : l(:label_user),

            member.project.name

          ]

        end

      end

    end

  end

<% other_formats_links do |f| %>

  <%= f.link_to_with_query_parameters "CSV", {}, :onclick => "showModal('csv-export-options', '330px'); return false;" %>

<% end %>

<div id="csv-export-options" style="display: none;">

  <h3 class="title"><%= l(:label_export_options, :export_format => 'CSV') %></h3>

  <%= form_tag(project_memberships_path(project_id: @project.id, format: 'csv'), :method => :get, :id => 'csv-export-form') do %>

  <%= export_csv_encoding_select_tag %>

  <p class="buttons">

    <%= submit_tag l(:button_export), :name => nil, :onclick => 'hideModal(this);', :data => {:disable_with => false} %>

    <%= link_to_function l(:button_cancel), 'hideModal(this);' %>

  </p>

  <% end %>

</div>

  def test_index_with_csv_format_should_export_csv

    project = Project.find(5)

    get(

      :index,

      params: {

        project_id: project.id,

        format: 'csv'

      }

    )

    assert_response :success

    assert_equal 'text/csv; header=present', response.media_type

    lines = response.body.chomp.split("\n")

    # Number of lines

    assert_equal project.memberships.sum{|m| m.roles.count } + 1, lines.size

    # Header

    assert_equal "\"\",Role,User or Group,Project", lines.first

    # Details

    to_test = [

      'John Smith,Manager,User,Private child of eCookbook',

      'A Team,Manager,Group,Private child of eCookbook',

      'A Team,Developer,Group,Private child of eCookbook',

      'User Misc,Manager,User,Private child of eCookbook',

      'User Misc,Developer,User,Private child of eCookbook',

      'Redmine Admin,Manager,User,Private child of eCookbook'

    ]

    to_test.each do |expected|

      assert_includes lines, expected

    end

  end