10 examples of 'django queryset get field value' in Python

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276def get_values(self):
277 values = []
278 if isinstance(self.model_field, SmartListFilter):
279 values = [
280 SmartFilterValue(self.model_field.parameter_name, choice[1], choice[0], self.query_params)
281 for choice in self.model_field.lookups()
282 ]
283 elif self.model_field.choices:
284 values = [
285 SmartFilterValue(self.field_name, choice[1], choice[0], self.query_params)
286 for choice in self.model_field.choices
287 ]
288 elif type(self.model_field) == BooleanField:
289 values = [
290 SmartFilterValue(self.field_name, choice[1], choice[0], self.query_params)
291 for choice in ((1, _('Yes')), (0, _('No')))
292 ]
293 elif issubclass(type(self.model_field), ForeignKey):
294 pks = self.object_list.order_by().distinct().values_list('%s__pk' % self.field_name, flat=True)
295 remote_field = self.model_field.rel if hasattr(self.model_field, 'rel') else self.model_field.remote_field
296 qs = remote_field.model.objects.filter(pk__in=pks)
297 values = [SmartFilterValue(self.field_name, obj, str(obj.pk), self.query_params) for obj in qs]
298
299 return [SmartFilterValue(self.field_name, _("All"), None, self.query_params)] + values
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22def get_prep_lookup(self):
23 if django.VERSION >= (1, 10):
24 if hasattr(self.rhs, '_prepare'):
25 value = self.rhs._prepare(self.lhs.output_field)
26 else:
27 value = self.rhs
28 value = self.lhs.output_field.get_prep_value([value])
29 else:
30 value = self.lhs.output_field.get_prep_lookup(
31 self.lookup_name, [self.rhs]
32 )
33 return value
27def get_queryset(self, resolved_qs, args, info):
28 return resolved_qs
71def get_field_value(self, instance, field_name):
72 return instance.query_string
28@classmethod
29def filter_for_lookup(cls, field, lookup_type):
30 if isinstance(field, EnumChoiceField):
31 return EnumChoiceFilter, {
32 'enum_class': field.enum_class,
33 'choice_builder': field.choice_builder
34 }
35
36 return super().filter_for_lookup(field, lookup_type)
80def value_from_object(self, instance):
81 return getattr(instance, self.name)
173def prepare_value(self, obj):
174 # Called when preparing the ChoiceField widget from the to_model queryset.
175 return obj.serializable_value('id')
102def get_prep_lookup(self, lookup_type, value):
103 if hasattr(value, "value"):
104 value = value.value
105
106 return super(SluggableField, self).get_prep_lookup(lookup_type, value)
80def get_queryset(self, request):
81 qs = super(RelatedFieldAdmin, self).get_queryset(request)
82
83 # include all related fields in queryset
84 select_related = [field.rsplit('__', 1)[0] for field in self.list_display if is_field_allowed(field)]
85
86 # explicitly add contents of self.list_select_related to select_related
87 if self.list_select_related:
88 for field in self.list_select_related:
89 select_related.append(field)
90
91 # Include all foreign key fields in queryset.
92 # This is based on ChangeList.get_query_set().
93 # We have to duplicate it here because select_related() only works once.
94 # Can't just use list_select_related because we might have multiple__depth__fields it won't follow.
95 model = qs.model
96 for field_name in self.list_display:
97 try:
98 field = model._meta.get_field(field_name)
99 except models.FieldDoesNotExist:
100 continue
101 try:
102 remote_field = field.remote_field
103 except AttributeError: # for Django<1.9
104 remote_field = field.rel
105 if isinstance(remote_field, models.ManyToOneRel):
106 select_related.append(field_name)
107
108 return qs.select_related(*select_related)
23def get_field(self, field_name):
24
25 try:
26 field = self.opts.get_field(field_name)
27 return field.name
28 except FieldDoesNotExist:
29 if callable(field_name):
30 attr = field_name
31 elif hasattr(self, field_name):
32 attr = getattr(self, field_name)
33 else:
34 attr = getattr(self.model, field_name)
35 return getattr(attr, '__name__', None)

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