Question

我有Booking模型，与Availability＆gt;相关联Facility＆gt; Venue

我的视图中有一个页面，它为给定的bookings呈现所有venue，并且它会导致巨大的N + 1查询。

控制器操作：

  def summary
    @venue = Venue.find params[:venue_id]
    @bookings = Booking.includes{availability.facility.venue}.for_venue(@venue).references(:all).sort_recent
  end

查看：

<table id="booking-history" class="table table-condensed table-hover">
    <thead>
        <th>Date</th>
        <th>Time</th>
        <th>Facility</th>
        <th>Purchase Time</th>
        <th>User</th>
        <th>Price</th>
        <th>Receipt</th>
    </thead>
    <tbody>
        <!-- venue_bookings is a method in venues helper -->
        <%= render :partial => "bookings/booking", collection: bookings, as: :booking %>

    </tbody>
</table>

部分：

    <tr>
  <!-- avail date -->
  <td><%= booking.availability.start_time.strftime("%a, %b %d %Y")%></td>
  <!-- avail time -->
  <td><%= booking.availability.start_time.strftime("%I:%M")%> - <%= booking.availability.end_time.strftime("%I:%M  %p")%></td>
  <td><%= booking.facility.name %></td>
  <td><%= booking.created_at.to_formatted_s(:short) %></td>
  <td><%= User.find(booking.user_id).name %></td>
  <td><%= number_to_currency booking.total_price%></td>
  <!-- Receipt Link -->
  <td> <%= link_to("Receipt", charge_path(booking) ) %></td>
</tr>

子弹日志：

user: vagrant
N+1 Query detected
  Booking =&gt; [:facility]
  Add to your finder: :includes =&gt; [:facility]
N+1 Query method call stack
  /vagrant/playtoday/app/views/bookings/_booking.html.erb:6:in `_app_views_bookings__booking_html_erb___965508066735177428_69970894883840'
  /vagrant/playtoday/app/views/bookings/_bookingHistory.html.erb:21:in `_app_views_bookings__booking_istory_html_erb___724060916350777358_69971212148620'

我已经在类变量中包含了，我不确定我应该在哪里做它。

rails部分的N + 1问题

0 个答案: