cdh.files.db.wrappers module

class cdh.files.db.wrappers.FileWrapper(file_instance, field, original_filename)

Bases: File

DEFAULT_CHUNK_SIZE = 65536

__init__(file_instance, field, original_filename)

close()

property closed

property content_type

property created_by

property created_on

delete(save=True, force=False)

Deletes the file on disk. If save = True, the metadata object will also be deleted. Note: only delete the metadata object if no other DB object is referencing it, otherwise you’ll get nasty Integrity errors!

Parameters

• save – Whether to also delete the metadata in the DB, defaults to True

• force – Whether to force a deletion if multiple DB objects still refer to it, defaults to False

property field

property file

get_content_type_display()

Shows the label of the content_type. See get_FOO_display() for more information.

property id

property modified_on

property name

property name_on_disk

open(mode='rb')

property path

property pk

save(content=None, original_filename=None)

property size

property url

property uuid

class cdh.files.db.wrappers.PrivateCacheMixin(*args, **kwargs)

Bases: object

__init__(*args, **kwargs)

cache_value(key, value)

get_cached_value(key)

invalidate_cache_value(key)

invalidate_caches()

is_cached(key)

class cdh.files.db.wrappers.TrackedFileWrapper(manager: Manager, instance, field: TrackedFileField)

Bases: PrivateCacheMixin

__init__(manager: Manager, instance, field: TrackedFileField)

add(file: Union[UUID, FileWrapper, BaseFile, int, str]) → None

property all

property current_file: Optional[FileWrapper]

Tries to retrieve the file representing the ‘current’ value of this field.

delete(file: Union[UUID, FileWrapper, BaseFile, int, str]) → None

delete_all() → None

Delete all files currently tracked

set_as_current(file: Union[UUID, FileWrapper, BaseFile, int, str]) → None