doc_content stringlengths 1 386k | doc_id stringlengths 5 188 |
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bulk_create(objs, batch_size=None, ignore_conflicts=False) | django.ref.models.querysets#django.db.models.query.QuerySet.bulk_create |
bulk_update(objs, fields, batch_size=None) | django.ref.models.querysets#django.db.models.query.QuerySet.bulk_update |
contains(obj) | django.ref.models.querysets#django.db.models.query.QuerySet.contains |
count() | django.ref.models.querysets#django.db.models.query.QuerySet.count |
create(**kwargs) | django.ref.models.querysets#django.db.models.query.QuerySet.create |
dates(field, kind, order='ASC') | django.ref.models.querysets#django.db.models.query.QuerySet.dates |
datetimes(field_name, kind, order='ASC', tzinfo=None, is_dst=None) | django.ref.models.querysets#django.db.models.query.QuerySet.datetimes |
db
The database that will be used if this query is executed now. | django.ref.models.querysets#django.db.models.query.QuerySet.db |
defer(*fields) | django.ref.models.querysets#django.db.models.query.QuerySet.defer |
delete() | django.ref.models.querysets#django.db.models.query.QuerySet.delete |
difference(*other_qs) | django.ref.models.querysets#django.db.models.query.QuerySet.difference |
distinct(*fields) | django.ref.models.querysets#django.db.models.query.QuerySet.distinct |
earliest(*fields) | django.ref.models.querysets#django.db.models.query.QuerySet.earliest |
exclude(*args, **kwargs) | django.ref.models.querysets#django.db.models.query.QuerySet.exclude |
exists() | django.ref.models.querysets#django.db.models.query.QuerySet.exists |
explain(format=None, **options) | django.ref.models.querysets#django.db.models.query.QuerySet.explain |
extra(select=None, where=None, params=None, tables=None, order_by=None, select_params=None) | django.ref.models.querysets#django.db.models.query.QuerySet.extra |
filter(*args, **kwargs) | django.ref.models.querysets#django.db.models.query.QuerySet.filter |
first() | django.ref.models.querysets#django.db.models.query.QuerySet.first |
get(*args, **kwargs) | django.ref.models.querysets#django.db.models.query.QuerySet.get |
get_or_create(defaults=None, **kwargs) | django.ref.models.querysets#django.db.models.query.QuerySet.get_or_create |
in_bulk(id_list=None, *, field_name='pk') | django.ref.models.querysets#django.db.models.query.QuerySet.in_bulk |
intersection(*other_qs) | django.ref.models.querysets#django.db.models.query.QuerySet.intersection |
iterator(chunk_size=2000) | django.ref.models.querysets#django.db.models.query.QuerySet.iterator |
last() | django.ref.models.querysets#django.db.models.query.QuerySet.last |
latest(*fields) | django.ref.models.querysets#django.db.models.query.QuerySet.latest |
none() | django.ref.models.querysets#django.db.models.query.QuerySet.none |
only(*fields) | django.ref.models.querysets#django.db.models.query.QuerySet.only |
order_by(*fields) | django.ref.models.querysets#django.db.models.query.QuerySet.order_by |
ordered
True if the QuerySet is ordered — i.e. has an order_by() clause or a default ordering on the model. False otherwise. | django.ref.models.querysets#django.db.models.query.QuerySet.ordered |
prefetch_related(*lookups) | django.ref.models.querysets#django.db.models.query.QuerySet.prefetch_related |
raw(raw_query, params=(), translations=None, using=None) | django.ref.models.querysets#django.db.models.query.QuerySet.raw |
reverse() | django.ref.models.querysets#django.db.models.query.QuerySet.reverse |
select_for_update(nowait=False, skip_locked=False, of=(), no_key=False) | django.ref.models.querysets#django.db.models.query.QuerySet.select_for_update |
select_related(*fields) | django.ref.models.querysets#django.db.models.query.QuerySet.select_related |
union(*other_qs, all=False) | django.ref.models.querysets#django.db.models.query.QuerySet.union |
update(**kwargs) | django.ref.models.querysets#django.db.models.query.QuerySet.update |
update_or_create(defaults=None, **kwargs) | django.ref.models.querysets#django.db.models.query.QuerySet.update_or_create |
using(alias) | django.ref.models.querysets#django.db.models.query.QuerySet.using |
values(*fields, **expressions) | django.ref.models.querysets#django.db.models.query.QuerySet.values |
values_list(*fields, flat=False, named=False) | django.ref.models.querysets#django.db.models.query.QuerySet.values_list |
RESTRICT
Prevent deletion of the referenced object by raising RestrictedError (a subclass of django.db.IntegrityError). Unlike PROTECT, deletion of the referenced object is allowed if it also references a different object that is being deleted in the same operation, but via a CASCADE relationship. Consider this set o... | django.ref.models.fields#django.db.models.RESTRICT |
SET()
Set the ForeignKey to the value passed to SET(), or if a callable is passed in, the result of calling it. In most cases, passing a callable will be necessary to avoid executing queries at the time your models.py is imported: from django.conf import settings
from django.contrib.auth import get_user_model
from dj... | django.ref.models.fields#django.db.models.SET |
SET_DEFAULT
Set the ForeignKey to its default value; a default for the ForeignKey must be set. | django.ref.models.fields#django.db.models.SET_DEFAULT |
SET_NULL
Set the ForeignKey null; this is only possible if null is True. | django.ref.models.fields#django.db.models.SET_NULL |
django.db.models.signals.class_prepared | django.ref.signals#django.db.models.signals.class_prepared |
django.db.models.signals.m2m_changed | django.ref.signals#django.db.models.signals.m2m_changed |
django.db.models.signals.post_delete | django.ref.signals#django.db.models.signals.post_delete |
django.db.models.signals.post_init | django.ref.signals#django.db.models.signals.post_init |
django.db.models.signals.post_migrate | django.ref.signals#django.db.models.signals.post_migrate |
django.db.models.signals.post_save | django.ref.signals#django.db.models.signals.post_save |
django.db.models.signals.pre_delete | django.ref.signals#django.db.models.signals.pre_delete |
django.db.models.signals.pre_init | django.ref.signals#django.db.models.signals.pre_init |
django.db.models.signals.pre_migrate | django.ref.signals#django.db.models.signals.pre_migrate |
django.db.models.signals.pre_save | django.ref.signals#django.db.models.signals.pre_save |
class SlugField(max_length=50, **options) | django.ref.models.fields#django.db.models.SlugField |
SlugField.allow_unicode
If True, the field accepts Unicode letters in addition to ASCII letters. Defaults to False. | django.ref.models.fields#django.db.models.SlugField.allow_unicode |
class SmallAutoField(**options) | django.ref.models.fields#django.db.models.SmallAutoField |
class SmallIntegerField(**options) | django.ref.models.fields#django.db.models.SmallIntegerField |
class StdDev(expression, output_field=None, sample=False, filter=None, default=None, **extra)
Returns the standard deviation of the data in the provided expression. Default alias: <field>__stddev
Return type: float if input is int, otherwise same as input field, or output_field if supplied Has one optional argumen... | django.ref.models.querysets#django.db.models.StdDev |
sample
By default, StdDev returns the population standard deviation. However, if sample=True, the return value will be the sample standard deviation. | django.ref.models.querysets#django.db.models.StdDev.sample |
class Subquery(queryset, output_field=None) | django.ref.models.expressions#django.db.models.Subquery |
class Sum(expression, output_field=None, distinct=False, filter=None, default=None, **extra)
Computes the sum of all values of the given expression. Default alias: <field>__sum
Return type: same as input field, or output_field if supplied Has one optional argument:
distinct
If distinct=True, Sum returns the su... | django.ref.models.querysets#django.db.models.Sum |
distinct
If distinct=True, Sum returns the sum of unique values. This is the SQL equivalent of SUM(DISTINCT <field>). The default value is False. | django.ref.models.querysets#django.db.models.Sum.distinct |
class TextField(**options) | django.ref.models.fields#django.db.models.TextField |
TextField.db_collation
New in Django 3.2. The database collation name of the field. Note Collation names are not standardized. As such, this will not be portable across multiple database backends. Oracle Oracle does not support collations for a TextField. | django.ref.models.fields#django.db.models.TextField.db_collation |
class TimeField(auto_now=False, auto_now_add=False, **options) | django.ref.models.fields#django.db.models.TimeField |
class Transform
A Transform is a generic class to implement field transformations. A prominent example is __year that transforms a DateField into a IntegerField. The notation to use a Transform in a lookup expression is <expression>__<transformation> (e.g. date__year). This class follows the Query Expression API, whi... | django.ref.models.lookups#django.db.models.Transform |
bilateral
A boolean indicating whether this transformation should apply to both lhs and rhs. Bilateral transformations will be applied to rhs in the same order as they appear in the lookup expression. By default it is set to False. For example usage, see How to write custom lookups. | django.ref.models.lookups#django.db.models.Transform.bilateral |
lhs
The left-hand side - what is being transformed. It must follow the Query Expression API. | django.ref.models.lookups#django.db.models.Transform.lhs |
lookup_name
The name of the lookup, used for identifying it on parsing query expressions. It cannot contain the string "__". | django.ref.models.lookups#django.db.models.Transform.lookup_name |
output_field
Defines the class this transformation outputs. It must be a Field instance. By default is the same as its lhs.output_field. | django.ref.models.lookups#django.db.models.Transform.output_field |
class UniqueConstraint(*expressions, fields=(), name=None, condition=None, deferrable=None, include=None, opclasses=())
Creates a unique constraint in the database. | django.ref.models.constraints#django.db.models.UniqueConstraint |
UniqueConstraint.condition | django.ref.models.constraints#django.db.models.UniqueConstraint.condition |
UniqueConstraint.deferrable | django.ref.models.constraints#django.db.models.UniqueConstraint.deferrable |
UniqueConstraint.expressions | django.ref.models.constraints#django.db.models.UniqueConstraint.expressions |
UniqueConstraint.fields | django.ref.models.constraints#django.db.models.UniqueConstraint.fields |
UniqueConstraint.include | django.ref.models.constraints#django.db.models.UniqueConstraint.include |
UniqueConstraint.name | django.ref.models.constraints#django.db.models.UniqueConstraint.name |
UniqueConstraint.opclasses | django.ref.models.constraints#django.db.models.UniqueConstraint.opclasses |
class URLField(max_length=200, **options) | django.ref.models.fields#django.db.models.URLField |
class UUIDField(**options) | django.ref.models.fields#django.db.models.UUIDField |
class Value(value, output_field=None) | django.ref.models.expressions#django.db.models.Value |
class Variance(expression, output_field=None, sample=False, filter=None, default=None, **extra)
Returns the variance of the data in the provided expression. Default alias: <field>__variance
Return type: float if input is int, otherwise same as input field, or output_field if supplied Has one optional argument:
s... | django.ref.models.querysets#django.db.models.Variance |
sample
By default, Variance returns the population variance. However, if sample=True, the return value will be the sample variance. | django.ref.models.querysets#django.db.models.Variance.sample |
atomic(using=None, savepoint=True, durable=False)
Atomicity is the defining property of database transactions. atomic allows us to create a block of code within which the atomicity on the database is guaranteed. If the block of code is successfully completed, the changes are committed to the database. If there is an ... | django.topics.db.transactions#django.db.transaction.atomic |
clean_savepoints(using=None)
Resets the counter used to generate unique savepoint IDs. | django.topics.db.transactions#django.db.transaction.clean_savepoints |
commit(using=None) | django.topics.db.transactions#django.db.transaction.commit |
get_autocommit(using=None) | django.topics.db.transactions#django.db.transaction.get_autocommit |
get_rollback(using=None) | django.topics.db.transactions#django.db.transaction.get_rollback |
non_atomic_requests(using=None)
This decorator will negate the effect of ATOMIC_REQUESTS for a given view: from django.db import transaction
@transaction.non_atomic_requests
def my_view(request):
do_stuff()
@transaction.non_atomic_requests(using='other')
def my_other_view(request):
do_stuff_on_the_other_dat... | django.topics.db.transactions#django.db.transaction.non_atomic_requests |
on_commit(func, using=None) | django.topics.db.transactions#django.db.transaction.on_commit |
rollback(using=None) | django.topics.db.transactions#django.db.transaction.rollback |
savepoint(using=None)
Creates a new savepoint. This marks a point in the transaction that is known to be in a “good” state. Returns the savepoint ID (sid). | django.topics.db.transactions#django.db.transaction.savepoint |
savepoint_commit(sid, using=None)
Releases savepoint sid. The changes performed since the savepoint was created become part of the transaction. | django.topics.db.transactions#django.db.transaction.savepoint_commit |
savepoint_rollback(sid, using=None)
Rolls back the transaction to savepoint sid. | django.topics.db.transactions#django.db.transaction.savepoint_rollback |
set_autocommit(autocommit, using=None) | django.topics.db.transactions#django.db.transaction.set_autocommit |
set_rollback(rollback, using=None) | django.topics.db.transactions#django.db.transaction.set_rollback |
receiver(signal) [source]
Parameters:
signal – A signal or a list of signals to connect a function to. | django.topics.signals#django.dispatch.receiver |
class Signal [source] | django.topics.signals#django.dispatch.Signal |
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