Source code for django_select2.views
"""JSONResponse views for model widgets."""
from django.core import signing
from django.core.signing import BadSignature
from django.http import Http404, JsonResponse
from django.utils.module_loading import import_string
from django.views.generic.list import BaseListView
from .cache import cache
from .conf import settings
[docs]
class AutoResponseView(BaseListView):
"""
View that handles requests from heavy model widgets.
The view only supports HTTP's GET method.
"""
[docs]
def get(self, request, *args, **kwargs):
"""
Return a :class:`.django.http.JsonResponse`.
Each result will be rendered by the widget's
:func:`django_select2.forms.ModelSelect2Mixin.result_from_instance` method.
Example::
{
'results': [
{
'text': "foo",
'id': 123
}
],
'more': true
}
"""
self.widget = self.get_widget_or_404()
self.term = kwargs.get("term", request.GET.get("term", ""))
self.object_list = self.get_queryset()
context = self.get_context_data()
return JsonResponse(
{
"results": [
self.widget.result_from_instance(obj, request)
for obj in context["object_list"]
],
"more": context["page_obj"].has_next(),
},
encoder=import_string(settings.SELECT2_JSON_ENCODER),
)
[docs]
def get_queryset(self):
"""Get QuerySet from cached widget."""
kwargs = {
model_field_name: self.request.GET.get(form_field_name)
for form_field_name, model_field_name in self.widget.dependent_fields.items()
}
kwargs.update(
{
f"{model_field_name}__in": self.request.GET.getlist(
f"{form_field_name}[]", []
)
for form_field_name, model_field_name in self.widget.dependent_fields.items()
}
)
return self.widget.filter_queryset(
self.request,
self.term,
self.queryset,
**{k: v for k, v in kwargs.items() if v},
)
[docs]
def get_paginate_by(self, queryset):
"""Paginate response by size of widget's `max_results` parameter."""
return self.widget.max_results