from django.core.urlresolvers import resolve


def get_breadcrumbs(url):
    """Given a url returns a list of breadcrumbs, which are each a tuple of (name, url)."""

    from djangorestframework.views import APIView

    def breadcrumbs_recursive(url, breadcrumbs_list):
        """Add tuples of (name, url) to the breadcrumbs list, progressively chomping off parts of the url."""

        try:
            (view, unused_args, unused_kwargs) = resolve(url)
        except Exception:
            pass
        else:
            # Check if this is a REST framework view, and if so add it to the breadcrumbs
            if isinstance(getattr(view, 'cls_instance', None), APIView):
                breadcrumbs_list.insert(0, (view.cls_instance.get_name(), url))

        if url == '':
            # All done
            return breadcrumbs_list

        elif url.endswith('/'):
            # Drop trailing slash off the end and continue to try to resolve more breadcrumbs
            return breadcrumbs_recursive(url.rstrip('/'), breadcrumbs_list)

        # Drop trailing non-slash off the end and continue to try to resolve more breadcrumbs
        return breadcrumbs_recursive(url[:url.rfind('/') + 1], breadcrumbs_list)

    return breadcrumbs_recursive(url, [])

from django.core.urlresolvers import resolve, get_script_prefix


def get_breadcrumbs(url):
    """Given a url returns a list of breadcrumbs, which are each a tuple of (name, url)."""

    from djangorestframework.views import APIView

    def breadcrumbs_recursive(url, breadcrumbs_list, prefix):
        """Add tuples of (name, url) to the breadcrumbs list, progressively chomping off parts of the url."""

        try:
            (view, unused_args, unused_kwargs) = resolve(url)
        except Exception:
            pass
        else:
            # Check if this is a REST framework view, and if so add it to the breadcrumbs
            if isinstance(getattr(view, 'cls_instance', None), APIView):
                breadcrumbs_list.insert(0, (view.cls_instance.get_name(), prefix + url))

        if url == '':
            # All done
            return breadcrumbs_list

        elif url.endswith('/'):
            # Drop trailing slash off the end and continue to try to resolve more breadcrumbs
            return breadcrumbs_recursive(url.rstrip('/'), breadcrumbs_list, prefix)

        # Drop trailing non-slash off the end and continue to try to resolve more breadcrumbs
        return breadcrumbs_recursive(url[:url.rfind('/') + 1], breadcrumbs_list, prefix)

    prefix = get_script_prefix()
    url = url[len(prefix):]
    return breadcrumbs_recursive(url, [], prefix)

Use get_script_prefix to play nicely if not installed at the root.
Use get_script_prefix to play nicely if not installed at the root.

- from django.core.urlresolvers import resolve
+ from django.core.urlresolvers import resolve, get_script_prefix
  
  
  def get_breadcrumbs(url):
      """Given a url returns a list of breadcrumbs, which are each a tuple of (name, url)."""
  
      from djangorestframework.views import APIView
  
-     def breadcrumbs_recursive(url, breadcrumbs_list):
+     def breadcrumbs_recursive(url, breadcrumbs_list, prefix):
          """Add tuples of (name, url) to the breadcrumbs list, progressively chomping off parts of the url."""
  
          try:
              (view, unused_args, unused_kwargs) = resolve(url)
          except Exception:
              pass
          else:
              # Check if this is a REST framework view, and if so add it to the breadcrumbs
              if isinstance(getattr(view, 'cls_instance', None), APIView):
-                 breadcrumbs_list.insert(0, (view.cls_instance.get_name(), url))
+                 breadcrumbs_list.insert(0, (view.cls_instance.get_name(), prefix + url))
  
          if url == '':
              # All done
              return breadcrumbs_list
  
          elif url.endswith('/'):
              # Drop trailing slash off the end and continue to try to resolve more breadcrumbs
-             return breadcrumbs_recursive(url.rstrip('/'), breadcrumbs_list)
+             return breadcrumbs_recursive(url.rstrip('/'), breadcrumbs_list, prefix)
  
          # Drop trailing non-slash off the end and continue to try to resolve more breadcrumbs
-         return breadcrumbs_recursive(url[:url.rfind('/') + 1], breadcrumbs_list)
+         return breadcrumbs_recursive(url[:url.rfind('/') + 1], breadcrumbs_list, prefix)
  
+     prefix = get_script_prefix()
+     url = url[len(prefix):]
-     return breadcrumbs_recursive(url, [])
+     return breadcrumbs_recursive(url, [], prefix)
  
Use get_script_prefix to play nicely if not installed at the root.
## Code Before:
from django.core.urlresolvers import resolve


def get_breadcrumbs(url):
    """Given a url returns a list of breadcrumbs, which are each a tuple of (name, url)."""

    from djangorestframework.views import APIView

    def breadcrumbs_recursive(url, breadcrumbs_list):
        """Add tuples of (name, url) to the breadcrumbs list, progressively chomping off parts of the url."""

        try:
            (view, unused_args, unused_kwargs) = resolve(url)
        except Exception:
            pass
        else:
            # Check if this is a REST framework view, and if so add it to the breadcrumbs
            if isinstance(getattr(view, 'cls_instance', None), APIView):
                breadcrumbs_list.insert(0, (view.cls_instance.get_name(), url))

        if url == '':
            # All done
            return breadcrumbs_list

        elif url.endswith('/'):
            # Drop trailing slash off the end and continue to try to resolve more breadcrumbs
            return breadcrumbs_recursive(url.rstrip('/'), breadcrumbs_list)

        # Drop trailing non-slash off the end and continue to try to resolve more breadcrumbs
        return breadcrumbs_recursive(url[:url.rfind('/') + 1], breadcrumbs_list)

    return breadcrumbs_recursive(url, [])

## Instruction:
Use get_script_prefix to play nicely if not installed at the root.
## Code After:
from django.core.urlresolvers import resolve, get_script_prefix


def get_breadcrumbs(url):
    """Given a url returns a list of breadcrumbs, which are each a tuple of (name, url)."""

    from djangorestframework.views import APIView

    def breadcrumbs_recursive(url, breadcrumbs_list, prefix):
        """Add tuples of (name, url) to the breadcrumbs list, progressively chomping off parts of the url."""

        try:
            (view, unused_args, unused_kwargs) = resolve(url)
        except Exception:
            pass
        else:
            # Check if this is a REST framework view, and if so add it to the breadcrumbs
            if isinstance(getattr(view, 'cls_instance', None), APIView):
                breadcrumbs_list.insert(0, (view.cls_instance.get_name(), prefix + url))

        if url == '':
            # All done
            return breadcrumbs_list

        elif url.endswith('/'):
            # Drop trailing slash off the end and continue to try to resolve more breadcrumbs
            return breadcrumbs_recursive(url.rstrip('/'), breadcrumbs_list, prefix)

        # Drop trailing non-slash off the end and continue to try to resolve more breadcrumbs
        return breadcrumbs_recursive(url[:url.rfind('/') + 1], breadcrumbs_list, prefix)

    prefix = get_script_prefix()
    url = url[len(prefix):]
    return breadcrumbs_recursive(url, [], prefix)
