django.db.models.fields.files.FileDescriptor

class documentation

class FileDescriptor(DeferredAttribute): (source)

Known subclasses: django.db.models.fields.files.ImageFileDescriptor

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The descriptor for the file attribute on the model instance. Return a FieldFile when accessed so you can write code like:: >>> from myapp.models import MyModel >>> instance = MyModel.objects.get(pk=1) >>> instance.file.size Assign a file object on assignment so you can do:: >>> with open('/path/to/hello.world') as f: ... instance.file = File(f)

Method __get__ Retrieve and caches the value from the datastore on the first lookup. Return the cached value.
Method __set__ Undocumented

Inherited from DeferredAttribute:

Method __init__ Undocumented
Instance Variable field Undocumented
Method _check_parent_chain Check if the field value can be fetched from a parent field already loaded in the instance. This can be done if the to-be fetched field is a primary key field.
def __get__(self, instance, cls=None): (source)
overrides django.db.models.query_utils.DeferredAttribute.__get__

Retrieve and caches the value from the datastore on the first lookup. Return the cached value.

def __set__(self, instance, value): (source)
overridden in django.db.models.fields.files.ImageFileDescriptor

Undocumented