[PATCH] Fetch all series for patch/cover viewing

[Stewart Smith]

e.g. a 10 comment patch goes from 26 queries in 17-20ms down to 20
queries in 12ms.

A 67 comment cover letter goes from 14 queries in 16ms down to 8 queries
in 8ms.

So, effectively, a near 2x perf improvement.

Previously, at several points we were asking for the latest series and
then asking for all the series. Since there just usually aren't *that*
many series, fetch them all and take the first one if we need to.

Signed-off-by: Stewart Smith <stewart at linux.ibm.com>
---
 patchwork/templates/patchwork/submission.html | 10 +++++-----
 patchwork/views/cover.py                      |  2 +-
 patchwork/views/patch.py                      |  1 +
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/patchwork/templates/patchwork/submission.html b/patchwork/templates/patchwork/submission.html
index 2f69735d6925..3b6f9fbe909e 100644
--- a/patchwork/templates/patchwork/submission.html
+++ b/patchwork/templates/patchwork/submission.html
@@ -64,15 +64,15 @@ function toggle_div(link_id, headers_id)
    </div>
   </td>
  </tr>
-{% if submission.latest_series %}
+{% if submission.all_series %}
  <tr>
   <th>Series</th>
   <td>
    <div class="patchrelations">
     <ul>
-     {% for series in submission.series.all %}
+     {% for series in all_series %}
      <li>
-      {% if series == submission.latest_series %}
+      {% if forloop.first %}
        {{ series }}
       {% else %}
        <a href="{% url 'patch-list' project_id=project.linkname %}?series={{ series.id }}">
@@ -93,7 +93,7 @@ function toggle_div(link_id, headers_id)
    >show</a>
    <div id="patchrelations" class="patchrelations" style="display:none;">
     <ul>
-    {% with submission.latest_series.cover_letter as cover %}
+    {% with all_series.cover_letter as cover %}
      <li>
      {% if cover %}
       {% if cover == submission %}
@@ -106,7 +106,7 @@ function toggle_div(link_id, headers_id)
      {% endif %}
      </li>
     {% endwith %}
-    {% for sibling in submission.latest_series.patches.all %}
+    {% for sibling in all_series.patches.all %}
      <li>
       {% if sibling == submission %}
        {{ sibling.name|default:"[no subject]"|truncatechars:100 }}
diff --git a/patchwork/views/cover.py b/patchwork/views/cover.py
index edad90bc694d..1ee2b3f988fa 100644
--- a/patchwork/views/cover.py
+++ b/patchwork/views/cover.py
@@ -49,7 +49,7 @@ def cover_detail(request, cover_id):
     comments = comments.select_related('submitter')
     comments = comments.only('submitter','date','id','content','submission')
     context['comments'] = comments
-
+    context['all_series'] = cover.series.all().order_by('-date')
     return render_to_response('patchwork/submission.html', context)
 
 
diff --git a/patchwork/views/patch.py b/patchwork/views/patch.py
index f43fbecd9a4d..e1d0cdcfcf39 100644
--- a/patchwork/views/patch.py
+++ b/patchwork/views/patch.py
@@ -118,6 +118,7 @@ def patch_detail(request, patch_id):
     comments = comments.select_related('submitter')
     comments = comments.only('submitter','date','id','content','submission')
 
+    context['all_series'] = patch.series.all().order_by('-date')
     context['comments'] = comments
     context['submission'] = patch
     context['patchform'] = form
-- 
2.17.1