164 lines
6.6 KiB
Python
164 lines
6.6 KiB
Python
# encoding: utf-8
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from __future__ import absolute_import, division, print_function, unicode_literals
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from django import template
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from django.contrib.admin.options import csrf_protect_m, ModelAdmin
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from django.contrib.admin.views.main import ChangeList, SEARCH_VAR
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from django.core.exceptions import PermissionDenied
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from django.core.paginator import InvalidPage, Paginator
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from django.shortcuts import render_to_response
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from django.utils.translation import ungettext
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from haystack import connections
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from haystack.query import SearchQuerySet
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from haystack.utils import get_model_ct_tuple
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try:
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from django.utils.encoding import force_text
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except ImportError:
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from django.utils.encoding import force_unicode as force_text
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def list_max_show_all(changelist):
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"""
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Returns the maximum amount of results a changelist can have for the
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"Show all" link to be displayed in a manner compatible with both Django
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1.4 and 1.3. See Django ticket #15997 for details.
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"""
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try:
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# This import is available in Django 1.3 and below
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from django.contrib.admin.views.main import MAX_SHOW_ALL_ALLOWED
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return MAX_SHOW_ALL_ALLOWED
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except ImportError:
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return changelist.list_max_show_all
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class SearchChangeList(ChangeList):
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def __init__(self, **kwargs):
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self.haystack_connection = kwargs.pop('haystack_connection', 'default')
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super(SearchChangeList, self).__init__(**kwargs)
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def get_results(self, request):
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if not SEARCH_VAR in request.GET:
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return super(SearchChangeList, self).get_results(request)
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# Note that pagination is 0-based, not 1-based.
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sqs = SearchQuerySet(self.haystack_connection).models(self.model).auto_query(request.GET[SEARCH_VAR]).load_all()
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paginator = Paginator(sqs, self.list_per_page)
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# Get the number of objects, with admin filters applied.
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result_count = paginator.count
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full_result_count = SearchQuerySet(self.haystack_connection).models(self.model).all().count()
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can_show_all = result_count <= list_max_show_all(self)
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multi_page = result_count > self.list_per_page
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# Get the list of objects to display on this page.
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try:
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result_list = paginator.page(self.page_num + 1).object_list
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# Grab just the Django models, since that's what everything else is
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# expecting.
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result_list = [result.object for result in result_list]
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except InvalidPage:
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result_list = ()
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self.result_count = result_count
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self.full_result_count = full_result_count
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self.result_list = result_list
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self.can_show_all = can_show_all
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self.multi_page = multi_page
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self.paginator = paginator
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class SearchModelAdminMixin(object):
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# haystack connection to use for searching
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haystack_connection = 'default'
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@csrf_protect_m
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def changelist_view(self, request, extra_context=None):
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if not self.has_change_permission(request, None):
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raise PermissionDenied
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if not SEARCH_VAR in request.GET:
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# Do the usual song and dance.
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return super(SearchModelAdminMixin, self).changelist_view(request, extra_context)
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# Do a search of just this model and populate a Changelist with the
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# returned bits.
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if not self.model in connections[self.haystack_connection].get_unified_index().get_indexed_models():
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# Oops. That model isn't being indexed. Return the usual
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# behavior instead.
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return super(SearchModelAdminMixin, self).changelist_view(request, extra_context)
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# So. Much. Boilerplate.
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# Why copy-paste a few lines when you can copy-paste TONS of lines?
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list_display = list(self.list_display)
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kwargs = {
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'haystack_connection': self.haystack_connection,
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'request': request,
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'model': self.model,
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'list_display': list_display,
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'list_display_links': self.list_display_links,
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'list_filter': self.list_filter,
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'date_hierarchy': self.date_hierarchy,
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'search_fields': self.search_fields,
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'list_select_related': self.list_select_related,
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'list_per_page': self.list_per_page,
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'list_editable': self.list_editable,
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'model_admin': self
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}
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# Django 1.4 compatibility.
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if hasattr(self, 'list_max_show_all'):
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kwargs['list_max_show_all'] = self.list_max_show_all
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changelist = SearchChangeList(**kwargs)
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formset = changelist.formset = None
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media = self.media
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# Build the action form and populate it with available actions.
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# Check actions to see if any are available on this changelist
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actions = self.get_actions(request)
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if actions:
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action_form = self.action_form(auto_id=None)
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action_form.fields['action'].choices = self.get_action_choices(request)
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else:
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action_form = None
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selection_note = ungettext('0 of %(count)d selected',
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'of %(count)d selected', len(changelist.result_list))
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selection_note_all = ungettext('%(total_count)s selected',
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'All %(total_count)s selected', changelist.result_count)
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context = {
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'module_name': force_text(self.model._meta.verbose_name_plural),
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'selection_note': selection_note % {'count': len(changelist.result_list)},
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'selection_note_all': selection_note_all % {'total_count': changelist.result_count},
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'title': changelist.title,
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'is_popup': changelist.is_popup,
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'cl': changelist,
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'media': media,
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'has_add_permission': self.has_add_permission(request),
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# More Django 1.4 compatibility
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'root_path': getattr(self.admin_site, 'root_path', None),
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'app_label': self.model._meta.app_label,
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'action_form': action_form,
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'actions_on_top': self.actions_on_top,
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'actions_on_bottom': self.actions_on_bottom,
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'actions_selection_counter': getattr(self, 'actions_selection_counter', 0),
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}
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context.update(extra_context or {})
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context_instance = template.RequestContext(request, current_app=self.admin_site.name)
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app_name, model_name = get_model_ct_tuple(self.model)
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return render_to_response(self.change_list_template or [
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'admin/%s/%s/change_list.html' % (app_name, model_name),
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'admin/%s/change_list.html' % app_name,
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'admin/change_list.html'
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], context, context_instance=context_instance)
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class SearchModelAdmin(SearchModelAdminMixin, ModelAdmin):
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pass
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