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Fixed #19717 - Removed mentions of "root QuerySet" in docs.

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Thanks julien.aubert.mail@ for the report and James Pic for the patch.
This commit is contained in:
Tim Graham 2013-02-18 09:35:22 -05:00
parent 92837ae569
commit 64d0f89ab1
1 changed files with 10 additions and 19 deletions
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29
docs/topics/db/queries.txt
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@ -163,10 +163,9 @@ default. Access it directly via the model class, like so::
"record-level" operations.
The :class:`~django.db.models.Manager` is the main source of ``QuerySets`` for
a model. It acts as a "root" :class:`~django.db.models.query.QuerySet` that
describes all objects in the model's database table. For example,
``Blog.objects`` is the initial :class:`~django.db.models.query.QuerySet` that
contains all ``Blog`` objects in the database.
a model. For example, ``Blog.objects.all()`` returns a
:class:`~django.db.models.query.QuerySet` that contains all ``Blog`` objects in
the database.
Retrieving all objects
----------------------
@ -180,20 +179,13 @@ this, use the :meth:`~django.db.models.query.QuerySet.all` method on a
The :meth:`~django.db.models.query.QuerySet.all` method returns a
:class:`~django.db.models.query.QuerySet` of all the objects in the database.
(If ``Entry.objects`` is a :class:`~django.db.models.query.QuerySet`, why can't
we just do ``Entry.objects``? That's because ``Entry.objects``, the root
:class:`~django.db.models.query.QuerySet`, is a special case that cannot be
evaluated. The :meth:`~django.db.models.query.QuerySet.all` method returns a
:class:`~django.db.models.query.QuerySet` that *can* be evaluated.)
Retrieving specific objects with filters
----------------------------------------
The root :class:`~django.db.models.query.QuerySet` provided by the
:class:`~django.db.models.Manager` describes all objects in the database
table. Usually, though, you'll need to select only a subset of the complete set
of objects.
The :class:`~django.db.models.query.QuerySet` returned by
:meth:`~django.db.models.query.QuerySet.all` describes all objects in the
database table. Usually, though, you'll need to select only a subset of the
complete set of objects.
To create such a subset, you refine the initial
:class:`~django.db.models.query.QuerySet`, adding filter conditions. The two
@ -216,10 +208,9 @@ so::
Entry.objects.filter(pub_date__year=2006)
We don't have to add an :meth:`~django.db.models.query.QuerySet.all` --
``Entry.objects.all().filter(...)``. That would still work, but you only need
:meth:`~django.db.models.query.QuerySet.all` when you want all objects from the
root :class:`~django.db.models.query.QuerySet`.
With the default manager class, it is the same as::
Entry.objects.all().filter(pub_date__year=2006)
.. _chaining-filters: