[#843] Added pagination for projects list

Pagination has been added for the projects list, including a general script in utils.py that takes care of the format of the pagination so that the number of items is never bigger than 9.

akvo/rsr/views/project.py

@@ -5,12 +5,24 @@
 Akvo RSR module. For additional details on the GNU license please
 see < http://www.gnu.org/licenses/agpl.html >.
 """
+
 from akvo.rsr.models import Project
+from akvo.utils import pagination
+
 from django.shortcuts import get_object_or_404, render
 
 
 def directory(request):
-    context = {'projects': Project.objects.published()}
+    projects_list = Project.objects.published()
+    page = request.GET.get('page')
+
+    page, paginator, page_range = pagination(page, projects_list, 10)
+
+    context = {
+        'page': page,
+        'paginator': paginator,
+        'page_range': page_range,
+        }
     return render(request, 'project_directory.html', context)
 
 

akvo/templates/navigation/pagination.html

@@ -0,0 +1,19 @@
+<ul class="pagination">
+    {% if page.has_previous %}
+    <li><a href="?page={{ page.previous_page_number }}">&laquo;</a></li>
+    {% else %}
+    <li class="disabled"><span>&laquo;</span></li>
+    {% endif %}
+    {% for page_number in page_range %}
+    {% if not page_number == '...' %}
+    <li {% if page_number == page.number %}class="active"{% endif %}><a href="?page={{ page_number }}">{{ page_number }}</a></li>
+    {% else %}
+    <li class="disabled"><span>{{ page_number }}</span></li>
+    {% endif %}
+    {% endfor %}
+    {% if page.has_next %}
+    <li><a href="?page={{ page.next_page_number }}">&raquo;</a></li>
+    {% else %}
+    <li class="disabled"><span>&raquo;</span></li>
+    {% endif %}
+</ul>

akvo/templates/project_directory.html

@@ -13,7 +13,7 @@
 <section id="search-filter">
     <div id="search">
       <form class="form-inline" role="form">
-          <p>{% trans "Refine the project list below by searcing by name, organisation or sector" %}</p>
+          <p>{% trans "Refine the project list below by searching by name, organisation or sector" %}</p>
         <div class="input-group"\>
           <input type="text" class="form-control" placeholder="{% trans "Search" %}">
           <span class="input-group-btn">
@@ -51,21 +51,12 @@
 <div class="container">
 
     <div class="row center-text">
-        <p>{% blocktrans %}Viewing n of n projects{% endblocktrans %}</p>
-
-        <ul class="pagination">
-            <li class="disabled"><a href="#">&laquo;</a></li>
-            <li class="active"><a href="#">1</a></li>
-            <li><a href="#">2</a></li>
-            <li><a href="#">3</a></li>
-            <li><a href="#">4</a></li>
-            <li><a href="#">5</a></li>
-            <li><a href="#">&raquo;</a></li>
-        </ul>
+        <p>Viewing {{ page.start_index }} - {{ page.end_index }} of {{ paginator.count }} projects</p>
+        {% include 'navigation/pagination.html' %}
     </div>
 
     <section class="main-list">
-        {% for p in projects %}
+        {% for p in page %}
         <article class="row">
             <div class="col-sm-2 col-xs-3">
                 <a href="{% url 'project-main' p.id %}">
@@ -105,15 +96,7 @@ <h4 class="section">Finance</h4>
     </section>
 
     <div class="row center-text">
-        <ul class="pagination">
-            <li class="disabled"><a href="#">&laquo;</a></li>
-            <li class="active"><a href="#">1</a></li>
-            <li><a href="#">2</a></li>
-            <li><a href="#">3</a></li>
-            <li><a href="#">4</a></li>
-            <li><a href="#">5</a></li>
-            <li><a href="#">&raquo;</a></li>
-        </ul>
+        {% include 'navigation/pagination.html' %}
     </div>
 </div>
 {% endblock %}

akvo/utils.py

@@ -23,6 +23,7 @@
 
 from django.conf import settings
 from django.core.mail import send_mail, EmailMessage
+from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
 from django.core.urlresolvers import reverse
 from django.db.models import get_model
 from django.http import HttpResponse
@@ -470,3 +471,30 @@ def rsr_show_keywords(instance):
         return keyword_str
     else:
         return 'None'
+
+
+def pagination(page, object_list, objects_per_page):
+    paginator = Paginator(object_list, objects_per_page)
+
+    try:
+        page = paginator.page(page)
+    except PageNotAnInteger:
+        # If page is not an integer, deliver first page.
+        page = paginator.page(1)
+    except EmptyPage:
+        # If page is out of range (e.g. 9999), deliver last page of results.
+        page = paginator.page(paginator.num_pages)
+
+    page_range = paginator.page_range
+    active = page.number
+
+    if not len(page_range) < 10:
+        if active > 4:
+            page_range[1] = '...'
+            del page_range[2:active-2]
+        if (page_range[-1] - active) > 3:
+            page_range[-2] = '...'
+            active_index = page_range.index(active)
+            del page_range[active_index+2:-2]
+
+    return page, paginator, page_range