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When I try to put a zlibbed string in models.TextField
>>> f = VCFile(head = 'blahblah'.encode('zlib'))
>>> f.save()
it fails:
...
raise DjangoUnicodeDecodeError(s, *e.args)
DjangoUnicodeDecodeError: 'utf8' codec can't decode byte 0x9c in position 1: unexpected code byte. You passed in 'x\x9cK\xcaI\xccH\x02b\x00\x0eP\x03/' (<type 'str'>)
Is there any way to fix this (apart from escaping the string – it has to be space-efficent)?
Like Marcus says, you’ll have to use BLOB if you want to keep it in binary format. If you’re OK with encoding it, you can use base64 encoding:
In my very basic tests with 33k characters, the zlib string was 28% the size of the original string, the base64 encoded zlib string was 37% the size of the original string. Not quite as good on compression, but still a big improvement.