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"""
Storing files according to a custom storage system
``FileField`` and its variations can take a ``storage`` argument to specify how
and where files should be stored.
"""
import random
import tempfile
from pathlib import Path
from django.core.files.storage import FileSystemStorage
from django.db import models
class CustomValidNameStorage(FileSystemStorage):
def get_valid_name(self, name):
# mark the name to show that this was called
return name + '_valid'
temp_storage_location = tempfile.mkdtemp()
temp_storage = FileSystemStorage(location=temp_storage_location)
def callable_storage():
return temp_storage
class CallableStorage(FileSystemStorage):
def __call__(self):
# no-op implementation.
return self
class Storage(models.Model):
def custom_upload_to(self, filename):
return 'foo'
def random_upload_to(self, filename):
# This returns a different result each time,
# to make sure it only gets called once.
return '%s/%s' % (random.randint(100, 999), filename)
def pathlib_upload_to(self, filename):
return Path('bar') / filename
normal = models.FileField(storage=temp_storage, upload_to='tests')
custom = models.FileField(storage=temp_storage, upload_to=custom_upload_to)
pathlib_callable = models.FileField(storage=temp_storage, upload_to=pathlib_upload_to)
pathlib_direct = models.FileField(storage=temp_storage, upload_to=Path('bar'))
random = models.FileField(storage=temp_storage, upload_to=random_upload_to)
custom_valid_name = models.FileField(
storage=CustomValidNameStorage(location=temp_storage_location),
upload_to=random_upload_to,
)
storage_callable = models.FileField(storage=callable_storage, upload_to='storage_callable')
storage_callable_class = models.FileField(storage=CallableStorage, upload_to='storage_callable_class')
default = models.FileField(storage=temp_storage, upload_to='tests', default='tests/default.txt')
empty = models.FileField(storage=temp_storage)
limited_length = models.FileField(storage=temp_storage, upload_to='tests', max_length=20)
extended_length = models.FileField(storage=temp_storage, upload_to='tests', max_length=300)
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