from django.core.paginator import Paginator, InvalidPage, EmptyPage
from django.db import models
from django.db.models.query import QuerySet
-from django.utils.encoding import smart_str
+from django.utils.encoding import force_unicode, smart_str
+from django.utils.translation import ugettext
from django.utils.http import urlencode
-
import operator
+try:
+ set
+except NameError:
+ from sets import Set as set # Python 2.3 fallback
+
+# The system will display a "Show all" link on the change list only if the
+# total result count is less than or equal to this setting.
MAX_SHOW_ALL_ALLOWED = 20000
-#change list settings
+# Changelist settings
ALL_VAR = 'all'
ORDER_VAR = 'o'
ORDER_TYPE_VAR = 'ot'
PAGE_VAR = 'p'
SEARCH_VAR = 'q'
+TO_FIELD_VAR = 't'
IS_POPUP_VAR = 'pop'
ERROR_FLAG = 'e'
+# Text to display within change-list table cells if the value is blank.
+EMPTY_CHANGELIST_VALUE = '(None)'
+
class ChangeList(object):
+
+ #def __init__(self, request, model, list_display, list_display_links, list_filter, date_hierarchy, search_fields, list_select_related, list_per_page, list_editable, model_admin):
def __init__(self, request, model, list_filter, search_fields, list_per_page, queryset=None):
self.model = model
self.opts = model._meta
self.list_display = []
self.list_display_links = None
self.list_filter = list_filter
-
+ #self.date_hierarchy = date_hierarchy
self.search_fields = search_fields
self.list_select_related = None
self.list_per_page = list_per_page
+ #self.list_editable = list_editable
self.model_admin = None
+ # Get search parameters from the query string.
try:
- self.page_num = int(request.GET.get(PAGE_VAR,'0'))
+ self.page_num = int(request.GET.get(PAGE_VAR, '0'))
except ValueError:
self.page_num = 0
self.show_all = 'all' in request.GET
+ #self.is_popup = IS_POPUP_VAR in request.GET
+ #self.to_field = request.GET.get(TO_FIELD_VAR)
self.params = dict(request.GET.items())
if PAGE_VAR in self.params:
del self.params[PAGE_VAR]
+ #if TO_FIELD_VAR in self.params:
+ # del self.params[TO_FIELD_VAR]
if ERROR_FLAG in self.params:
del self.params[ERROR_FLAG]
-
+
self.multi_page = True
self.can_show_all = False
-
+
self.order_field, self.order_type = self.get_ordering()
self.query = request.GET.get(SEARCH_VAR, '')
self.query_set = self.get_query_set()
self.get_results(request)
+ #self.title = (self.is_popup and ugettext('Select %s') % force_unicode(self.opts.verbose_name) or ugettext('Select %s to change') % force_unicode(self.opts.verbose_name))
self.filter_specs, self.has_filters = self.get_filters(request)
+ #self.pk_attname = self.lookup_opts.pk.attname
- #self.result_count = 'result count'
- #self.full_result_count = 'full result count'
-
def get_filters(self, request):
filter_specs = []
if self.list_filter:
# Get the list of objects to display on this page.
if (self.show_all and can_show_all) or not multi_page:
- result_list = list(self.query_set)
+ result_list = self.query_set._clone()
else:
try:
result_list = paginator.page(self.page_num+1).object_list
# options, then check the object's default ordering. If neither of
# those exist, order descending by ID by default. Finally, look for
# manually-specified ordering from the query string.
- ordering = lookup_opts.ordering or ['-' + lookup_opts.pk.name]
+ ordering = lookup_opts.ordering or ['-' + lookup_opts.pk.name]
if ordering[0].startswith('-'):
order_field, order_type = ordering[0][1:], 'desc'
# Naked except! Because we don't have any other way of validating "params".
# They might be invalid if the keyword arguments are incorrect, or if the
# values are not in the correct type, so we might get FieldError, ValueError,
- # ValicationError, or ? from a custom field that raises yet something else
+ # ValicationError, or ? from a custom field that raises yet something else
# when handed impossible data.
- except Exception, e:
- print e
+ except:
raise IncorrectLookupParameters
# Use select_related() if one of the list_display options is a field
- # with a relationship.
- if self.list_select_related:
- qs = qs.select_related()
- else:
- for field_name in self.list_display:
- try:
- f = self.lookup_opts.get_field(field_name)
- except models.FieldDoesNotExist:
- pass
- else:
- if isinstance(f.rel, models.ManyToOneRel):
- qs = qs.select_related()
- break
+ # with a relationship and the provided queryset doesn't already have
+ # select_related defined.
+ if not qs.query.select_related:
+ if self.list_select_related:
+ qs = qs.select_related()
+ else:
+ for field_name in self.list_display:
+ try:
+ f = self.lookup_opts.get_field(field_name)
+ except models.FieldDoesNotExist:
+ pass
+ else:
+ if isinstance(f.rel, models.ManyToOneRel):
+ qs = qs.select_related()
+ break
# Set ordering.
if self.order_field:
if self.search_fields and self.query:
for bit in self.query.split():
- or_queries = [models.Q(**{construct_search(field_name): bit}) for field_name in self.search_fields]
- other_qs = QuerySet(self.model)
- other_qs.dup_select_related(qs)
- other_qs = other_qs.filter(reduce(operator.or_, or_queries))
- qs = qs & other_qs
+ or_queries = [models.Q(**{construct_search(str(field_name)): bit}) for field_name in self.search_fields]
+ qs = qs.filter(reduce(operator.or_, or_queries))
for field_name in self.search_fields:
if '__' in field_name:
qs = qs.distinct()
break
- if self.opts.one_to_one_field:
- qs = qs.complex_filter(self.opts.one_to_one_field.rel.limit_choices_to)
-
return qs
-
+ #def url_for_result(self, result):
+ # return "%s/" % quote(getattr(result, self.pk_attname))
projects / htsworkflow.git / commitdiff