Bad example 1

gistfile1.txt

%nav.navbar.navbar-default
  .container-fluid
    .navbar-header
      %span.navbar-brand
        =link_to 'Users', admin_users_path
        |
        =link_to 'Invitations', admin_invitations_path
    .collapse.navbar-collapse
      .navbar-right
        = link_to 'Log out', admin_session_path, method: 'delete', class: 'btn btn-sm btn-default navbar-btn'
.row
  .col-md-1
  .col-md-5
    %h1.text-left Invitations
.row
  .col-md-1
  .col-md-5
    = link_to 'New Invitation', new_admin_invitation_path
.row
  .col-md-1
  .col-md-9
    %h3 Pending Invitations
    .text-muted Sent invitations that have yet to expire or be redeemed
    %table.table.table-striped
      %thead
        %tr
          %th Email
          %th Workshops
          %th Sent at
          %th Expired at
      %tbody
      - @invitation.each do |invitation|
        - if invitation.expired?(invitation) == false and invitation.redeemed?(invitation) == false
          %tr
            %td 
              = invitation.email 
            %td 
              = invitation.workshop_ids.join(', ')
            %td
              = invitation.created_at
            %td
              = invitation.created_at + 2.weeks
.row
  .col-md-1
  .col-md-9
    %h3 Expired Invitations
    .text-muted Invitations that expired without being redeemed
    %table.table.table-striped
      %thead
        %tr
          %th Email
          %th Workshops
          %th Sent at
          %th Expired at
      %tbody
      - @invitation.each do |invitation|
        - if invitation.expired?(invitation) and invitation.redeemed?(invitation) == false
          %tr 
            %td
              = invitation.email
            %td
              = invitation.workshop_ids.join(', ') 
            %td 
              = invitation.created_at
            %td 
              = invitation.created_at + 2.weeks
.row
  .col-md-1
  .col-md-9
    %h3 Redeemed Invitations
    .text-muted Invitations that were redeemed before they were expired
    %table.table.table-striped
      %thead
        %tr
          %th Email
          %th Workshops
          %th Sent at
          %th Created at
          %th Redeemed at
      %tbody
      - @invitation.each do |invitation|
        - if  invitation.redeemed?(invitation) and invitation.expired?(invitation) == false
          %tr 
            %td
              = link_to invitation.email, edit_admin_user_path(invitation.user_id) 
            %td
              = invitation.workshop_ids.join(', ')
            %td 
              = invitation.created_at
            %td
              = invitation.created_at + 2.weeks
            %td
              = invitation.redeemed_at