From: Marek Stępniowski <marek@stepniowski.com>
Date: Fri, 22 Aug 2008 12:15:43 +0000 (+0200)
Subject: Added view tagged_object_list to newtagging app and refactored catalogue.views.tagged... 
X-Git-Url: https://git.mdrn.pl/wolnelektury.git/commitdiff_plain/4a6b5644b971d067f20fc05866b837dc30264f07?ds=inline

Added view tagged_object_list to newtagging app and refactored catalogue.views.tagged_book_list with help of this view.
---

diff --git a/catalogue/views.py b/catalogue/views.py
index 2f4b30ff5..d5b4f69d1 100644
--- a/catalogue/views.py
+++ b/catalogue/views.py
@@ -6,13 +6,19 @@ from django.core.urlresolvers import reverse
 from django.db.models import Q
 from django.contrib.auth.decorators import login_required
 from django.utils.datastructures import SortedDict
-from django.views.decorators.http import require_GET, require_POST
+from django.views.decorators.http import require_POST
 from django.contrib import auth
 from django.contrib.auth.forms import UserCreationForm, AuthenticationForm
 from django.utils import simplejson
 from django.utils.functional import Promise
 from django.utils.encoding import force_unicode
 
+from newtagging.views import tagged_object_list
+from catalogue import models
+from catalogue import forms
+from catalogue.utils import split_tags
+
+
 class LazyEncoder(simplejson.JSONEncoder):
     def default(self, obj):
         if isinstance(obj, Promise):
@@ -20,11 +26,6 @@ class LazyEncoder(simplejson.JSONEncoder):
         return obj
 
 
-from catalogue import models
-from catalogue import forms
-from catalogue.utils import split_tags
-
-
 def catalogue_redirect(request, tags=''):
     if len(request.GET['q']) > 0:
         try:
@@ -97,31 +98,26 @@ def tagged_book_list(request, tags=''):
     if 'q' in request.GET:
         return catalogue_redirect(request, tags)
     
-    choices_split = tags.split('/')
-    tags = []
-    for tag in choices_split:
-        tag = get_object_or_404(models.Tag, slug=tag)
-        if tag.category == 'set' and (not request.user.is_authenticated() or request.user != tag.user):
-            raise Http404
-        tags.append(tag)
+    try:
+        tags = models.Tag.get_tag_list(tags)
+    except models.Tag.DoesNotExist:
+        raise Http404
         
-    books = models.Book.objects.with_all(tags)
-    
     if request.user.is_authenticated():
         extra_where = '(NOT catalogue_tag.category = "set" OR catalogue_tag.user_id = %d)' % request.user.id
     else:
         extra_where = 'NOT catalogue_tag.category = "set"'
     related_tags = models.Tag.objects.related_for_model(tags, models.Book, counts=True, extra={'where': [extra_where]})
     categories = split_tags(related_tags)
-    
-    form = forms.SearchForm()
-    
-    return render_to_response('catalogue/tagged_book_list.html', dict(
+
+    return tagged_object_list(
+        request,
+        tag_model=models.Tag,
+        queryset_or_model=models.Book,
         tags=tags,
-        form=form,
-        books=books,
-        categories=categories,
-    ), context_instance=RequestContext(request))
+        template_name='catalogue/tagged_book_list.html',
+        extra_context = {'categories': categories, 'form': forms.SearchForm() },
+    )
 
 
 def book_detail(request, slug):
diff --git a/newtagging/views.py b/newtagging/views.py
new file mode 100644
index 000000000..150a08477
--- /dev/null
+++ b/newtagging/views.py
@@ -0,0 +1,47 @@
+"""
+Tagging related views.
+"""
+from django.http import Http404
+from django.utils.translation import ugettext as _
+from django.views.generic.list_detail import object_list
+
+
+def tagged_object_list(request, queryset_or_model=None, tag_model=None, tags=None,
+        related_tags=False, related_tag_counts=True, **kwargs):
+    """
+    A thin wrapper around
+    ``django.views.generic.list_detail.object_list`` which creates a
+    ``QuerySet`` containing instances of the given queryset or model
+    tagged with the given tag.
+
+    In addition to the context variables set up by ``object_list``, a
+    ``tag`` context variable will contain the ``Tag`` instance for the
+    tag.
+
+    If ``related_tags`` is ``True``, a ``related_tags`` context variable
+    will contain tags related to the given tag for the given model.
+    Additionally, if ``related_tag_counts`` is ``True``, each related
+    tag will have a ``count`` attribute indicating the number of items
+    which have it in addition to the given tag.
+    """
+    # Check attributes
+    if queryset_or_model is None:
+        raise AttributeError(_('tagged_object_list must be called with a queryset or a model.'))
+    if tag_model is None:
+        raise AttributeError(_('tagged_object_list must be called with a tag model.'))
+    if tags is None:
+        raise AttributeError(_('tagged_object_list must be called with a tag.'))
+
+    tag_instances = tag_model.get_tag_list(tags)
+    if tag_instances is None:
+        raise Http404(_('No tags found matching "%s".') % tags)
+    queryset = tag_model.intermediary_table_model.objects.get_intersection_by_model(queryset_or_model, tag_instances)
+    if not kwargs.has_key('extra_context'):
+        kwargs['extra_context'] = {}
+    kwargs['extra_context']['tags'] = tag_instances
+    if related_tags:
+        kwargs['extra_context']['related_tags'] = \
+            tag_model.objects.related_for_model(tag_instances, queryset_or_model,
+                                          counts=related_tag_counts)
+    return object_list(request, queryset, **kwargs)
+
diff --git a/templates/catalogue/tagged_book_list.html b/templates/catalogue/tagged_book_list.html
index 35dcf1312..3fd8e7255 100644
--- a/templates/catalogue/tagged_book_list.html
+++ b/templates/catalogue/tagged_book_list.html
@@ -63,7 +63,7 @@
         </ol>
     </form>
     
-    {% autopaginate books 10 %}
+    {% autopaginate object_list 10 %}
     <div id="books-list">
         {% with tags|last as last_tag %}
         {% if last_tag.has_description %}
@@ -74,7 +74,7 @@
         {% endif %}
         {% endwith %}
         <ol>
-        {% for book in books %}
+        {% for book in object_list %}
             <li>{% include "catalogue/_book.html" %}</li>
         {% endfor %}
         </ol>