53 lines
1.9 KiB
Python
53 lines
1.9 KiB
Python
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from django.http import Http404, JsonResponse
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from django.views.generic.list import BaseListView
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class AutocompleteJsonView(BaseListView):
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"""Handle AutocompleteWidget's AJAX requests for data."""
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paginate_by = 20
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model_admin = None
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def get(self, request, *args, **kwargs):
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"""
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Return a JsonResponse with search results of the form:
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{
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results: [{id: "123" text: "foo"}],
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pagination: {more: true}
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}
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"""
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if not self.model_admin.get_search_fields(request):
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raise Http404(
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'%s must have search_fields for the autocomplete_view.' %
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type(self.model_admin).__name__
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)
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if not self.has_perm(request):
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return JsonResponse({'error': '403 Forbidden'}, status=403)
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self.term = request.GET.get('term', '')
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self.paginator_class = self.model_admin.paginator
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self.object_list = self.get_queryset()
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context = self.get_context_data()
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return JsonResponse({
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'results': [
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{'id': str(obj.pk), 'text': str(obj)}
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for obj in context['object_list']
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],
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'pagination': {'more': context['page_obj'].has_next()},
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})
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def get_paginator(self, *args, **kwargs):
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"""Use the ModelAdmin's paginator."""
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return self.model_admin.get_paginator(self.request, *args, **kwargs)
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def get_queryset(self):
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"""Return queryset based on ModelAdmin.get_search_results()."""
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qs = self.model_admin.get_queryset(self.request)
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qs, search_use_distinct = self.model_admin.get_search_results(self.request, qs, self.term)
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if search_use_distinct:
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qs = qs.distinct()
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return qs
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def has_perm(self, request, obj=None):
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"""Check if user has permission to access the related model."""
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return self.model_admin.has_view_permission(request, obj=obj)
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