Exibe somente conteúdos com imagens no portlet de carrossel de imagens.

Quando um usuário adicionava uma coleção, que possuia um conteúdo sem
imagem, no portlet de carrossel de imagens, ocorria o erro:

    AttributeError: 'NoneType' object has no attribute 'url'

Agora exibimos somente conteúdos que com certeza possuem imagens.

Fixes #8

.gitignore

@@ -3,6 +3,7 @@
 *.log
 *.mo
 *.py?
+*.pyc
 *.swp
 # dirs
 .settings
@@ -15,7 +16,6 @@ include/
 lib/
 local/
 parts/
-src/*
 test.plone_addon/
 var/
 # files
@@ -34,5 +34,4 @@ report.html
 !.gitattributes
 !.gitignore
 !.gitkeep
-!.travis.yml
-!src/brasil.gov.portlets
+!.travis.yml

CHANGES.rst

@@ -4,7 +4,8 @@ Changelog
 1.0rc2 (unreleased)
 -------------------
 
-- Nothing changed yet.
+- Exibe somente conteúdos com imagens no portlet de carrossel de imagens (closes `#8`_).
+  [idgserpro]
 
 
 1.0rc1 (2016-06-09)
@@ -20,3 +21,6 @@ Changelog
 ------------------
 
 - Versão inicial.
+
+
+.. _`#8`: https://github.com/plonegovbr/brasil.gov.portlets/issues/8

src/brasil/gov/portlets/portlets/mediacarousel.py

@@ -174,7 +174,8 @@ def __init__(self, *args):
     def css_class(self):
         header = self.data.header
         normalizer = getUtility(IIDNormalizer)
-        return 'brasil-gov-portlets-mediacarousel-{0}'.format(normalizer.normalize(header))
+        return 'brasil-gov-portlets-mediacarousel-{0}'.format(
+            normalizer.normalize(header))
 
     @memoize
     def results(self):
@@ -193,7 +194,12 @@ def results(self):
                 results = collection.queryCatalog(**query)
             if limit and limit > 0:
                 results = results[:limit]
-        return [b.getObject() for b in results]
+        list_results = []
+        for result in results:
+            obj = result.getObject()
+            if self.thumbnail(obj):  # somente retorna conteúdos com imagens
+                list_results.append(obj)
+        return list_results
 
     @memoize
     def collection(self):
@@ -229,23 +235,26 @@ def header(self):
         hx = getattr(E, self.data.header_type)(self.data.header)
         return html.tostring(hx)
 
+    @memoize
     def thumbnail(self, item):
         if self._has_image_field(item):
             scales = item.restrictedTraverse('@@images')
             thumb = scales.scale('image', width=45, height=36)
-            return {
-                'src': thumb.url,
-                'alt': item.Description() or item.Title(),
-            }
+            if thumb:  # conteúdo possui imagem
+                return {
+                    'src': thumb.url,
+                    'alt': item.Description() or item.Title(),
+                }
 
     def scale(self, item):
         if self._has_image_field(item):
             scales = item.restrictedTraverse('@@images')
             thumb = scales.scale('image', width=242, height=166)
-            return {
-                'src': thumb.url,
-                'alt': item.Description() or item.Title(),
-            }
+            if thumb:  # conteúdo possui imagem
+                return {
+                    'src': thumb.url,
+                    'alt': item.Description() or item.Title(),
+                }
 
 
 class AddForm(base.AddForm):

src/brasil/gov/portlets/testing.py

@@ -18,7 +18,7 @@
 
 
 class CreateTestContent(object):
-    test_date_order = [3, 1, 2]
+    test_date_order = [3, 1, 2, 4]
     test_startdate_order = [3, 2, 1]
     YOUTUBE_EMBED = """
 <iframe width="459" height="344" \
@@ -79,7 +79,7 @@ def create_news(self):
             title='News Folder',
             container=self.portal
         )
-        for i in xrange(1, 4):
+        for i in xrange(1, 5):
             o = api.content.create(
                 type='News Item',
                 title='New {0}'.format(i),
@@ -96,7 +96,8 @@ def create_news(self):
                 '2014/05/0{0} 14:23:38.334118 GMT-3'
                 .format(self.test_date_order[i - 1])
             ))
-            o.setImage(self._generate_jpeg(50, 50))
+            if i != 4:  # Cria notícia sem imagem
+                o.setImage(self._generate_jpeg(50, 50))
         api.content.create(
             type='Collection',
             title='News Collection',

src/brasil/gov/portlets/tests/test_mediacarousel_portlet.py

@@ -25,15 +25,25 @@ def setUp(self):
         setRoles(self.portal, TEST_USER_ID, ['Manager'])
 
         self.images = {}
-        self.images['collection'] = self.portal['images-folder']['images-collection']
-        self.images['path'] = '/' + '/'.join(self.images['collection'].getPhysicalPath()[2:])
+        self.images['collection'] = \
+            self.portal['images-folder']['images-collection']
+        self.images['path'] = '/' + '/'.join(
+            self.images['collection'].getPhysicalPath()[2:])
         self.images['url'] = self.images['collection'].absolute_url()
 
         self.files = {}
-        self.files['collection'] = self.portal['files-folder']['files-collection']
-        self.files['path'] = '/' + '/'.join(self.files['collection'].getPhysicalPath()[2:])
+        self.files['collection'] = \
+            self.portal['files-folder']['files-collection']
+        self.files['path'] = '/' + '/'.join(
+            self.files['collection'].getPhysicalPath()[2:])
         self.files['url'] = self.files['collection'].absolute_url()
 
+        self.news = {}
+        self.news['collection'] = self.portal['news-folder']['news-collection']
+        self.news['path'] = '/' + '/'.join(
+            self.news['collection'].getPhysicalPath()[2:])
+        self.news['url'] = self.news['collection'].absolute_url()
+
     def _renderer(self, context=None, request=None, view=None, manager=None,
                   assignment=None):
         context = context or self.portal
@@ -56,7 +66,7 @@ def _assigned_renderer(self, col):
             footer=u'Mais...',
             footer_url=col['url'],
             show_rights=True,
-            limit=3,
+            limit=4,
             collection=col['path']
         )
         r = self._renderer(context=self.portal,
@@ -66,11 +76,13 @@ def _assigned_renderer(self, col):
         return r
 
     def test_portlet_type_registered(self):
-        portlet = getUtility(IPortletType, name='brasil.gov.portlets.mediacarousel')
+        portlet = getUtility(IPortletType,
+                             name='brasil.gov.portlets.mediacarousel')
         self.assertEqual(portlet.addview, 'brasil.gov.portlets.mediacarousel')
 
     def test_registered_interfaces(self):
-        portlet = getUtility(IPortletType, name='brasil.gov.portlets.mediacarousel')
+        portlet = getUtility(IPortletType,
+                             name='brasil.gov.portlets.mediacarousel')
         registered_interfaces = [_getDottedName(i) for i in portlet.for_]
         registered_interfaces.sort()
         self.assertEqual(
@@ -85,19 +97,24 @@ def test_interfaces(self):
         self.assertTrue(IPortletDataProvider.providedBy(portlet.data))
 
     def test_invoke_addview(self):
-        portlet = getUtility(IPortletType, name='brasil.gov.portlets.mediacarousel')
-        mapping = self.portal.restrictedTraverse('++contextportlets++plone.leftcolumn')
+        portlet = getUtility(IPortletType,
+                             name='brasil.gov.portlets.mediacarousel')
+        mapping = self.portal.restrictedTraverse(
+            '++contextportlets++plone.leftcolumn')
         for m in mapping.keys():
             del mapping[m]
         addview = mapping.restrictedTraverse('+/' + portlet.addview)
         addview.createAndAdd(data={})
 
         self.assertEqual(len(mapping), 1)
-        self.assertTrue(isinstance(mapping.values()[0], mediacarousel.Assignment))
+        self.assertTrue(isinstance(mapping.values()[0],
+                                   mediacarousel.Assignment))
 
     def test_portlet_properties(self):
-        portlet = getUtility(IPortletType, name='brasil.gov.portlets.mediacarousel')
-        mapping = self.portal.restrictedTraverse('++contextportlets++plone.leftcolumn')
+        portlet = getUtility(IPortletType,
+                             name='brasil.gov.portlets.mediacarousel')
+        mapping = self.portal.restrictedTraverse(
+            '++contextportlets++plone.leftcolumn')
         for m in mapping.keys():
             del mapping[m]
         addview = mapping.restrictedTraverse('+/' + portlet.addview)
@@ -157,14 +174,21 @@ def test_renderer_cssclass(self):
         r1 = self._assigned_renderer(self.images)
 
         self.assertEqual(r1.css_class(),
-                         'brasil-gov-portlets-mediacarousel-portal-padrao-carrossel-de-imagens')
+                         'brasil-gov-portlets-mediacarousel-portal'
+                         '-padrao-carrossel-de-imagens')
 
     def test_renderer_results(self):
         r = self._assigned_renderer(self.images)
 
         results = [b.id for b in r.results()]
         self.assertEqual(results, ['image-2', 'image-3', 'image-1'])
 
+    def test_renderer_results_col_news_without_img(self):
+        r = self._assigned_renderer(self.news)
+
+        results = [b.id for b in r.results()]
+        self.assertEqual(results, ['new-2', 'new-3', 'new-1'])
+
     def test_renderer_collection(self):
         r = self._assigned_renderer(self.images)
 
@@ -173,14 +197,15 @@ def test_renderer_collection(self):
     def test_renderer_header(self):
         r = self._assigned_renderer(self.images)
 
-        self.assertEqual(r.header(), u'<h2>Portal Padr&#227;o Carrossel de Imagens</h2>')
+        self.assertEqual(r.header(),
+                         u'<h2>Portal Padr&#227;o Carrossel de Imagens</h2>')
 
     def test_renderer_thumbnail(self):
         r1 = self._assigned_renderer(self.files)
         r2 = self._assigned_renderer(self.images)
 
         images = [r1.thumbnail(o) for o in r1.results()]
-        self.assertEqual(images, [None, None, None])
+        self.assertEqual(images, [])
 
         images = [r2.thumbnail(o) for o in r2.results()]
         img_order = [2, 3, 1]
@@ -189,8 +214,8 @@ def test_renderer_thumbnail(self):
             self.assertTrue(img['src'])
             self.assertIn('alt', img)
             self.assertEqual(img['alt'],
-                             ('Image {0} description - Lorem ipsum dolor sit ' +
-                              'amet, consectetur adipiscing elit. Donec ' +
+                             ('Image {0} description - Lorem ipsum dolor ' +
+                              'sit amet, consectetur adipiscing elit. Donec ' +
                               'eleifend hendrerit interdum.')
                              .format(img_order[i]))
 
@@ -199,7 +224,7 @@ def test_renderer_scale(self):
         r2 = self._assigned_renderer(self.images)
 
         images = [r1.scale(o) for o in r1.results()]
-        self.assertEqual(images, [None, None, None])
+        self.assertEqual(images, [])
 
         images = [r2.scale(o) for o in r2.results()]
         img_order = [2, 3, 1]
@@ -208,7 +233,21 @@ def test_renderer_scale(self):
             self.assertTrue(img['src'])
             self.assertIn('alt', img)
             self.assertEqual(img['alt'],
-                             ('Image {0} description - Lorem ipsum dolor sit ' +
-                              'amet, consectetur adipiscing elit. Donec ' +
+                             ('Image {0} description - Lorem ipsum dolor ' +
+                              'sit amet, consectetur adipiscing elit. Donec ' +
                               'eleifend hendrerit interdum.')
                              .format(img_order[i]))
+
+    def test_renderer_thumbnail_news_without_img(self):
+        r1 = self._assigned_renderer(self.news)
+
+        news_without_img = self.portal['news-folder']['new-4']
+        thumbnail = r1.thumbnail(news_without_img)
+        self.assertIsNone(thumbnail)
+
+    def test_renderer_scale_news_without_img(self):
+        r1 = self._assigned_renderer(self.news)
+
+        news_without_img = self.portal['news-folder']['new-4']
+        scale = r1.scale(news_without_img)
+        self.assertIsNone(scale)