File storage API¶

Getting the current storage class¶

Django provides two convenient ways to access the current storage class:

class DefaultStorage[ソース]¶

DefaultStorage provides lazy access to the current default storage system as defined by DEFAULT_FILE_STORAGE. DefaultStorage uses get_storage_class() internally.

get_storage_class(import_path=None)[ソース]¶

Returns a class or module which implements the storage API.

When called without the import_path parameter get_storage_class will return the current default storage system as defined by DEFAULT_FILE_STORAGE. If import_path is provided, get_storage_class will attempt to import the class or module from the given path and will return it if successful. An exception will be raised if the import is unsuccessful.

The FileSystemStorage class¶

class FileSystemStorage(location=None, base_url=None, file_permissions_mode=None, directory_permissions_mode=None)[ソース]¶

The FileSystemStorage class implements basic file storage on a local filesystem. It inherits from Storage and provides implementations for all the public methods thereof.

location¶

Absolute path to the directory that will hold the files. Defaults to the value of your MEDIA_ROOT setting.

base_url¶

URL that serves the files stored at this location. Defaults to the value of your MEDIA_URL setting.

file_permissions_mode¶

The file system permissions that the file will receive when it is saved. Defaults to FILE_UPLOAD_PERMISSIONS.

directory_permissions_mode¶

The file system permissions that the directory will receive when it is saved. Defaults to FILE_UPLOAD_DIRECTORY_PERMISSIONS.

注釈

The FileSystemStorage.delete() method will not raise an exception if the given file name does not exist.

The Storage class¶

class Storage[ソース]¶

The Storage class provides a standardized API for storing files, along with a set of default behaviors that all other storage systems can inherit or override as necessary.

注釈

When methods return naive datetime objects, the effective timezone used will be the current value of os.environ['TZ']; note that this is usually set from Django’s TIME_ZONE.

accessed_time(name)[ソース]¶

Returns a naive datetime object containing the last accessed time of the file. For storage systems that aren’t able to return the last accessed time this will raise NotImplementedError instead.

バージョン 1.10 で撤廃: Use get_accessed_time() instead.

created_time(name)[ソース]¶

Returns a naive datetime object containing the creation time of the file. For storage systems that aren’t able to return the creation time this will raise NotImplementedError instead.

バージョン 1.10 で撤廃: Use get_created_time() instead.

delete(name)[ソース]¶

Deletes the file referenced by name. If deletion is not supported on the target storage system this will raise NotImplementedError instead

exists(name)[ソース]¶

Returns True if a file referenced by the given name already exists in the storage system, or False if the name is available for a new file.

get_accessed_time(name)[ソース]¶

New in Django 1.10.

Returns a datetime of the last accessed time of the file. For storage systems unable to return the last accessed time this will raise NotImplementedError.

If USE_TZ is True, returns an aware datetime, otherwise returns a naive datetime in the local timezone.

get_available_name(name, max_length=None)[ソース]¶

Returns a filename based on the name parameter that’s free and available for new content to be written to on the target storage system.

The length of the filename will not exceed max_length, if provided. If a free unique filename cannot be found, a SuspiciousFileOperation exception will be raised.

If a file with name already exists, an underscore plus a random 7 character alphanumeric string is appended to the filename before the extension.

get_created_time(name)[ソース]¶

New in Django 1.10.

Returns a datetime of the creation time of the file. For storage systems unable to return the creation time this will raise NotImplementedError.

If USE_TZ is True, returns an aware datetime, otherwise returns a naive datetime in the local timezone.

get_modified_time(name)[ソース]¶

New in Django 1.10.

Returns a datetime of the last modified time of the file. For storage systems unable to return the last modified time this will raise NotImplementedError.

If USE_TZ is True, returns an aware datetime, otherwise returns a naive datetime in the local timezone.

get_valid_name(name)[ソース]¶

Returns a filename based on the name parameter that’s suitable for use on the target storage system.

generate_filename(filename)[ソース]¶

New in Django 1.10.

Validates the filename by calling get_valid_name() and returns a filename to be passed to the save() method.

The filename argument may include a path as returned by FileField.upload_to. In that case, the path won’t be passed to get_valid_name() but will be prepended back to the resulting name.

The default implementation uses os.path operations. Override this method if that’s not appropriate for your storage.

listdir(path)[ソース]¶

Lists the contents of the specified path, returning a 2-tuple of lists; the first item being directories, the second item being files. For storage systems that aren’t able to provide such a listing, this will raise a NotImplementedError instead.

modified_time(name)[ソース]¶

Returns a naive datetime object containing the last modified time. For storage systems that aren’t able to return the last modified time, this will raise NotImplementedError instead.

バージョン 1.10 で撤廃: Use get_modified_time() instead.

open(name, mode='rb')[ソース]¶

Opens the file given by name. Note that although the returned file is guaranteed to be a File object, it might actually be some subclass. In the case of remote file storage this means that reading/writing could be quite slow, so be warned.

path(name)[ソース]¶

The local filesystem path where the file can be opened using Python’s standard open(). For storage systems that aren’t accessible from the local filesystem, this will raise NotImplementedError instead.

save(name, content, max_length=None)[ソース]¶

Saves a new file using the storage system, preferably with the name specified. If there already exists a file with this name name, the storage system may modify the filename as necessary to get a unique name. The actual name of the stored file will be returned.

The max_length argument is passed along to get_available_name().

The content argument must be an instance of django.core.files.File or a file-like object that can be wrapped in File.

size(name)[ソース]¶

Returns the total size, in bytes, of the file referenced by name. For storage systems that aren’t able to return the file size this will raise NotImplementedError instead.

url(name)[ソース]¶

Returns the URL where the contents of the file referenced by name can be accessed. For storage systems that don’t support access by URL this will raise NotImplementedError instead.