openproject/app/views/cost_reports/index.rhtml

<% if @custom_error %>
  <div class="flash error"><%= @custom_error %></div>
<% end %>

<% @query = CostQuery.new
    @query.filter :project_id, :value => [1,2]
     @query.group_by :tweek
     @query.column :tweek
     @query.row :user_id
     @query.row :project_id %>

<h1>Die (sch&ouml;ne) "Tabelle":</h1>
<%

data = @query.walk(:row_first) do |current, sub|
  if current.column?
    if @was_column
      next sub.join
    else
      @was_column = true
      next sub
    end
  end
  field = "<td rowspan='%d'>#{current.type}, #{@was_column.inspect}: #{current.fields.inspect}</td>"
  if sub.blank?
    [field % 1]
  else
    if @was_column
      @was_column = false
      [(field % 1) << sub.join]
    else
      first, *rest = sub.flatten
      size = rest.size + 1
      first = (field % size) << first
      [first, *rest]
    end
  end
end

%>

<table border='1'>
  <% data.flatten.each do |line| %>
    <tr><%= line %></tr>
  <% end %>
</table>

<div style="border-width: 1; background-color: #BBB; padding: 5px">
  query chain: <br />
  <ul>
  <% chain = @query.chain
  while chain %>
    <li><%= chain.class.to_s %></li>
  <% chain = chain.child
    end %>
  </ul>

  <% max = 20 %>
  Result (row):
  <pre><% @row.recursive_each_with_level do |l, r| %>
    <%= "#{'|  '*l}#{r.class} (#{r.fields}) # size:#{r.size}" %><% max -=1; break if max <= 0; end %>
    ...
  </pre>

  <% max = 20 %>
  Result (column):
  <pre><% @column.recursive_each_with_level do |l, r| %>
    <%= "#{'|  '*l}#{r.class} (#{r.fields}) # size:#{r.size}" %><% max -=1; break if max <= 0; end %>
    ...
  </pre>
  
  SQL statement: <br />
  <pre><%= @query.sql_statement.to_s %></pre>
</div>