I change PERMALINK_STRUCTURE to ARTICLE_PERMALINK_STRUCTURE and updating the settings.rst documentation.

Also I have implemented other options to this setting, such as the category, the date, the author, this kind of things.

Finally, I have setted the ARTICLE_PERMALINK_STRUCTURE option as null in pelican.conf.py sample file.

docs/settings.rst

@@ -61,10 +61,22 @@ Setting name (default value)                        what does it do?
                                                     on the output path "static". By default,
                                                     pelican will copy the 'images' folder to the
                                                     output folder.
-`PERMALINK_STRUCTURE` (``'/%Y/%m/'``)               Allows to render URLs for articles sorted by date, 
+`ARTICLE_PERMALINK_STRUCTURE` (``'/%Y/%m/'``)       Allows to render URLs for articles sorted by date, 
                                                     in case you specify a format as specified in the 
-                                                    example. Also, you can specify any other word 
+                                                    example. It follows the python datetime directives:
-                                                    that you want.
+                                                     * %Y: Year with century as a decimal number.
+                                                     * %m: Month as a decimal number [01,12].
+                                                     * %d: Day of the month as a decimal number [01,31].
+
+                                                     Check the python datetime documentation 
+                                                     at http://bit.ly/cNcJUC for more information.
+                                                    
+                                                    Also, you can use any metadata in the 
+                                                    restructured text files:
+                                                     * category: '%(category)s'
+                                                     * author: '%(author)s'
+                                                     * tags: '%(tags)s'
+                                                     * date: '%(date)s'
 ================================================    =====================================================
 
 

pelican/generators.py

@@ -13,6 +13,7 @@ from jinja2 import Environment, FileSystemLoader, PrefixLoader, ChoiceLoader
 from jinja2.exceptions import TemplateNotFound
 
 from pelican.utils import copy, get_relative_path, process_translations, open
+from pelican.utils import slugify
 from pelican.contents import Article, Page, is_valid_content
 from pelican.readers import read_file
 from pelican.log import *
@@ -161,14 +162,18 @@ class ArticlesGenerator(Generator):
         article_template = self.get_template('article')
         for article in chain(self.translations, self.articles):
             add_to_url = u''
-            if self.settings.has_key('PERMALINK_STRUCTURE'):
+            if self.settings.has_key('ARTICLE_PERMALINK_STRUCTURE'):
-                permalink_structure = self.settings.get('PERMALINK_STRUCTURE')
+                article_permalink_structure = self.settings.get('ARTICLE_PERMALINK_STRUCTURE')
-                permalink_structure = permalink_structure.lstrip('/')
+                article_permalink_structure = article_permalink_structure.lstrip('/')
                 try:
-                    add_to_url = article.date.strftime(permalink_structure)
+                    add_to_url = article.date.strftime(article_permalink_structure)
                 except:
                     pass
 
+                add_to_url = add_to_url % article.__dict__
+                add_to_url = [slugify(i) for i in add_to_url.split('/')]
+                add_to_url = os.path.join(*add_to_url)
+
             article.url = urlparse.urljoin(add_to_url, article.url)
             article.save_as = urlparse.urljoin(add_to_url, article.save_as)
             write(article.save_as,

pelican/settings.py

@@ -42,7 +42,7 @@ _DEFAULT_CONFIG = {'PATH': None,
                    'DEFAULT_METADATA': (),
                    'FILES_TO_COPY': (),
                    'DEFAULT_STATUS': 'published',
-                   'PERMALINK_STRUCTURE': ''
+                   'ARTICLE_PERMALINK_STRUCTURE': '/%Y/%m/'
                    }
 
 def read_settings(filename):

samples/pelican.conf.py

@@ -9,6 +9,9 @@ PDF_GENERATOR = False
 REVERSE_CATEGORY_ORDER = True
 LOCALE = ""
 DEFAULT_PAGINATION = 2
+# Allows to construct an url like /2011/07/sample-post.html
+# See documentation for more info.
+ARTICLE_PERMALINK_STRUCTURE = ''
 
 FEED_RSS = 'feeds/all.rss.xml'
 CATEGORY_FEED_RSS = 'feeds/%s.rss.xml'