使用URL语法发送参数

Question

I'm trying to use the audio player Timeside in Django 1.5. JavaScript function that handles loading the player receives this set of parameters,

loadplayer.js

loadPlayer function (analizerUrl, soundUrl, soundImgSize, itemId, visualizers,   CurrentUserName, isStaffOrSuperuser)

In my template is the following script that handles launch

{% If item.file %}
  loadPlayer('{% url 'item-analyze-xml' item.public_id %}',
          "{% url 'item-export' item.public_id,"mp3" %}", undefined, '{{item.id}}', visualizers,
          CURRENT_USER_NAME,  //undefined if !user.is_authenticated
          true); //true because superuser
{% Endif%}

URLs are configured as follows

url(r'^archives/items/download/(?P<public_id>[A-Za-z0-9._-]+)\.(?P<extension>'
        + export_extensions + ')$',
    item_view.item_export,
    name="item-export"),

url(r'^archives/items/(?P<public_id>[A-Za-z0-9._-]+)/analyze/xml/$',
    item_view.item_analyze_xml,
    name="item-analyze-xml"),

This worked in Django 1.4, attempt to update for be used in version 1.5. The problem is that I can not send the parameter MP3 here

"{% url 'item-export' item.public_id,"mp3" %}", 

the view item_export is like this:

def item_export(self, request, public_id, extension):

When the player loads I get the following error:

Could not parse the remainder: ',' from 'pista.public_id,'

Which is the correct syntax for this on Django 1.5?

Using the name and equal solved this step

{% url 'item-export' public_id=item.public_id extension="mp3" %}

Seems like it is working but I have a new error:

NoReverseMatch at /pista/1/

Reverse for 'item-analyze-xml' with arguments '()' and keyword arguments '{u'public_id': ''}' not found.

Answer 1

I do not want to answer my own question but I've been searching and trying a lot and I found the solution.

{% Url 'impromusic-item-export' item.id 'mp3'%}

The first quotes refer to the name of the url(everybody know), item.id can be variable depends on the object, but if I write it in quotes it will be a string of characters wich not accept any value beyond which we assign. That's my conclusion after 5 hours of searching but I can be wrong :) hope u understand me