python - Django: URL pattern to include values from multiple fields -

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I'm quite new to the python and I'm trying to create a URL pattern which takes two fields as a parameter is. This is part of my model: 

  CATEGORY_CHOICES = (('M', 'Music'), ('G', 'Games'), ('T', 'TV') Slug = models.SlugField (unique = true, max_length = 255), ('F', 'movie'), ('o', 'mixed')) category = = model.carfield (max_long = 1, option = category_CHOICES) / Code>  
 What I want to achieve, as it is to be able to call: thisblog.com/music/this-post where / music category and / this post is slug. / P> 
 I had an attempt but I do not understand how to do it properly:  
  urlpatterns = patterns ('', url (r '^ admin / ', (Admin.site.urls), url (r' ^ $ ',' blog.views.index '), url (r' ^ (? P & lt; class & gt; [\ w \ -] +   
)      
 P> This one gives me a link on 'NoReverseMatch'  
 update:  
 I have a link in my html template:  
    
 get_absolute_url is defined:  
  def get_absolute_url (self): reverse reverse ('blog.views.post', args = [self. Slug]} << Code>   
 
 
 There are two errors in your  get_absolute_url  method First of all, you have to use the name attribute of the URL because you have defined it. And secondly, you have to provide both the criteria: class as well as the slug.  
 Then it should be:  
  reverse reverse ('blog_post', args = [self category, self.slug])   < / Div>

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