Fixed #13040 -- Added info on where to import File class from to File reference docs, and improved Sphinx formatting. Thanks to stherrien for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14339 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Gabriel Hurley 2010-10-24 09:12:40 +00:00
parent e4c0c377dd
commit 5d02b86afb
1 changed files with 59 additions and 53 deletions

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@ -3,18 +3,20 @@ The ``File`` object
.. currentmodule:: django.core.files .. currentmodule:: django.core.files
.. class:: File(file_object)
``File`` attributes and methods ``File`` attributes and methods
------------------------------- -------------------------------
Django's ``File`` has the following attributes and methods: The :mod:`django.core.files` module contains a built-in class for basic file
handling in Django. The :class:`File` class has the following attributes and
methods:
.. attribute:: File.name .. class:: File(file_object)
.. attribute:: name
The name of file including the relative path from :setting:`MEDIA_ROOT`. The name of file including the relative path from :setting:`MEDIA_ROOT`.
.. attribute:: File.path .. attribute:: path
The absolute path to the file's location on a local filesystem. The absolute path to the file's location on a local filesystem.
@ -22,7 +24,7 @@ Django's ``File`` has the following attributes and methods:
files locally; files stored on these systems will have a ``path`` of files locally; files stored on these systems will have a ``path`` of
``None``. ``None``.
.. attribute:: File.url .. attribute:: url
The URL where the file can be retrieved. This is often useful in The URL where the file can be retrieved. This is often useful in
:doc:`templates </topics/templates>`; for example, a bit of a template for :doc:`templates </topics/templates>`; for example, a bit of a template for
@ -32,11 +34,11 @@ Django's ``File`` has the following attributes and methods:
<img src='{{ car.photo.url }}' alt='{{ car.name }}' /> <img src='{{ car.photo.url }}' alt='{{ car.name }}' />
.. attribute:: File.size .. attribute:: size
The size of the file in bytes. The size of the file in bytes.
.. method:: File.open(mode=None) .. method:: open([mode=None])
Open or reopen the file (which by definition also does ``File.seek(0)``). Open or reopen the file (which by definition also does ``File.seek(0)``).
The ``mode`` argument allows the same values as Python's standard The ``mode`` argument allows the same values as Python's standard
@ -45,16 +47,16 @@ Django's ``File`` has the following attributes and methods:
When reopening a file, ``mode`` will override whatever mode the file was When reopening a file, ``mode`` will override whatever mode the file was
originally opened with; ``None`` means to reopen with the original mode. originally opened with; ``None`` means to reopen with the original mode.
.. method:: File.read(num_bytes=None) .. method:: read([num_bytes=None])
Read content from the file. The optional ``size`` is the number of bytes to Read content from the file. The optional ``size`` is the number of bytes to
read; if not specified, the file will be read to the end. read; if not specified, the file will be read to the end.
.. method:: File.__iter__() .. method:: __iter__()
Iterate over the file yielding one line at a time. Iterate over the file yielding one line at a time.
.. method:: File.chunks(chunk_size=None) .. method:: chunks([chunk_size=None])
Iterate over the file yielding "chunks" of a given size. ``chunk_size`` Iterate over the file yielding "chunks" of a given size. ``chunk_size``
defaults to 64 KB. defaults to 64 KB.
@ -62,41 +64,45 @@ Django's ``File`` has the following attributes and methods:
This is especially useful with very large files since it allows them to be This is especially useful with very large files since it allows them to be
streamed off disk and avoids storing the whole file in memory. streamed off disk and avoids storing the whole file in memory.
.. method:: File.multiple_chunks(chunk_size=None) .. method:: multiple_chunks([chunk_size=None])
Returns ``True`` if the file is large enough to require multiple chunks to Returns ``True`` if the file is large enough to require multiple chunks to
access all of its content give some ``chunk_size``. access all of its content give some ``chunk_size``.
.. method:: File.write(content) .. method:: write([content])
Writes the specified content string to the file. Depending on the storage Writes the specified content string to the file. Depending on the storage
system behind the scenes, this content might not be fully committed until system behind the scenes, this content might not be fully committed until
``close()`` is called on the file. ``close()`` is called on the file.
.. method:: File.close() .. method:: close()
Close the file. Close the file.
.. currentmodule:: django.core.files.images
Additional ``ImageField`` attributes Additional ``ImageField`` attributes
------------------------------------ ------------------------------------
.. attribute:: File.width .. class:: ImageFile(file_object)
.. attribute:: width
Width of the image. Width of the image.
.. attribute:: File.height .. attribute:: height
Height of the image. Height of the image.
.. currentmodule:: django.core.files
Additional methods on files attached to objects Additional methods on files attached to objects
----------------------------------------------- -----------------------------------------------
.. highlight:: pycon
Any :class:`File` that's associated with an object (as with ``Car.photo``, Any :class:`File` that's associated with an object (as with ``Car.photo``,
above) will also have a couple of extra methods: above) will also have a couple of extra methods:
.. method:: File.save(name, content, save=True) .. method:: File.save(name, content, [save=True])
Saves a new file with the file name and contents provided. This will not Saves a new file with the file name and contents provided. This will not
replace the existing file, but will create a new file and update the object replace the existing file, but will create a new file and update the object
@ -113,7 +119,7 @@ above) will also have a couple of extra methods:
Note that the ``content`` argument must be an instance of Note that the ``content`` argument must be an instance of
:class:`File` or of a subclass of :class:`File`. :class:`File` or of a subclass of :class:`File`.
.. method:: File.delete(save=True) .. method:: File.delete([save=True])
Remove the file from the model instance and delete the underlying file. The Remove the file from the model instance and delete the underlying file. The
``save`` argument works as above. ``save`` argument works as above.