54 lines
2.0 KiB
Python
54 lines
2.0 KiB
Python
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from django.urls import get_script_prefix, resolve
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def get_breadcrumbs(url, request=None):
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"""
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Given a url returns a list of breadcrumbs, which are each a
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tuple of (name, url).
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"""
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from rest_framework.reverse import preserve_builtin_query_params
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from rest_framework.views import APIView
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def breadcrumbs_recursive(url, breadcrumbs_list, prefix, seen):
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"""
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Add tuples of (name, url) to the breadcrumbs list,
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progressively chomping off parts of the url.
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"""
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try:
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(view, unused_args, unused_kwargs) = resolve(url)
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except Exception:
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pass
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else:
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# Check if this is a REST framework view,
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# and if so add it to the breadcrumbs
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cls = getattr(view, 'cls', None)
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initkwargs = getattr(view, 'initkwargs', {})
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if cls is not None and issubclass(cls, APIView):
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# Don't list the same view twice in a row.
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# Probably an optional trailing slash.
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if not seen or seen[-1] != view:
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c = cls(**initkwargs)
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name = c.get_view_name()
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insert_url = preserve_builtin_query_params(prefix + url, request)
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breadcrumbs_list.insert(0, (name, insert_url))
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seen.append(view)
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if url == '':
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# All done
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return breadcrumbs_list
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elif url.endswith('/'):
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# Drop trailing slash off the end and continue to try to
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# resolve more breadcrumbs
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url = url.rstrip('/')
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return breadcrumbs_recursive(url, breadcrumbs_list, prefix, seen)
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# Drop trailing non-slash off the end and continue to try to
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# resolve more breadcrumbs
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url = url[:url.rfind('/') + 1]
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return breadcrumbs_recursive(url, breadcrumbs_list, prefix, seen)
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prefix = get_script_prefix().rstrip('/')
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url = url[len(prefix):]
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return breadcrumbs_recursive(url, [], prefix, [])
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