Improve recipe search

* Use more traditional GET instead of POST method
* Search in pn, summary, description and filename instead of just pn

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>

README

@@ -91,5 +91,6 @@ Bundled jQuery is redistributed under the MIT license.
 Bundled uitablefilter.js is redistributed under the MIT license.
 
 All other content is copyright (C) 2013 Intel Corporation and licensed
-under the MIT license - see COPYING.MIT for details.
+under the MIT license (unless otherwise noted) - see COPYING.MIT for
+details.
 

layerindex/recipes.html

@@ -31,9 +31,8 @@
 
                 <div class="row-fluid">
                     <div class="input-append">
-                        <form id="filter-form" action="{% url recipe_search %}" method="post">
-                            {% csrf_token %}
-                            <input type="text" class="input-xxlarge" id="appendedInputButtons" placeholder="Search recipes" name="filter" value="{{ search_keyword }}" />
+                        <form id="filter-form" action="{% url recipe_search %}" method="get">
+                            <input type="text" class="input-xxlarge" id="appendedInputButtons" placeholder="Search recipes" name="q" value="{{ search_keyword }}" />
                             <button class="btn" type="submit">search</button>
                         </form>
                     </div>

layerindex/simplesearch.py

@@ -0,0 +1,39 @@
+# Borrowed from http://julienphalip.com/post/2825034077/adding-search-to-a-django-site-in-a-snap
+# Copyright 2011 Julien Phalip. All Rights Reserved.
+
+import re
+from django.db.models import Q
+
+def normalize_query(query_string,
+                    findterms=re.compile(r'"([^"]+)"|(\S+)').findall,
+                    normspace=re.compile(r'\s{2,}').sub):
+    ''' Splits the query string in invidual keywords, getting rid of unecessary spaces
+        and grouping quoted words together.
+        Example:
+
+        >>> normalize_query('  some random  words "with   quotes  " and   spaces')
+        ['some', 'random', 'words', 'with quotes', 'and', 'spaces']
+
+    '''
+    return [normspace(' ', (t[0] or t[1]).strip()) for t in findterms(query_string)]
+
+def get_query(query_string, search_fields):
+    ''' Returns a query, that is a combination of Q objects. That combination
+        aims to search keywords within a model by testing the given search fields.
+
+    '''
+    query = None # Query to search for every search term
+    terms = normalize_query(query_string)
+    for term in terms:
+        or_query = None # Query to search for a given term in each field
+        for field_name in search_fields:
+            q = Q(**{"%s__icontains" % field_name: term})
+            if or_query is None:
+                or_query = q
+            else:
+                or_query = or_query | q
+        if query is None:
+            query = or_query
+        else:
+            query = query & or_query
+    return query

layerindex/views.py

@@ -19,6 +19,7 @@ from django.db.models import Q
 from django.core.mail import EmailMessage
 from django.template.loader import get_template
 from django.template import Context
+import simplesearch
 import settings
 
 
@@ -96,22 +97,19 @@ class LayerListView(ListView):
 
 class RecipeSearchView(ListView):
     context_object_name = 'recipe_list'
-    paginate_by = 20
+    paginate_by = 10
 
     def get_queryset(self):
-        keyword = self.request.session.get('keyword')
-        if keyword:
-            return Recipe.objects.all().filter(pn__icontains=keyword).order_by('pn', 'layer')
+        query_string = self.request.GET.get('q', '')
+        if query_string.strip():
+            entry_query = simplesearch.get_query(query_string, ['pn', 'summary', 'description', 'filename'])
+            return Recipe.objects.filter(entry_query).order_by('pn', 'layer')
         else:
             return Recipe.objects.all().order_by('pn', 'layer')
 
-    def post(self, request, *args, **kwargs):
-        request.session['keyword'] = request.POST['filter']
-        return HttpResponseRedirect(reverse('recipe_search'))
-
     def get_context_data(self, **kwargs):
         context = super(RecipeSearchView, self).get_context_data(**kwargs)
-        context['search_keyword'] = self.request.session.get('keyword') or ''
+        context['search_keyword'] = self.request.GET.get('q', '')
         return context