Python Django Blob 模型字段
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Django Blob Model Field
提问by Cerin
How do you store a "blob" of binary data using Django's ORM, with a PostgreSQL backend? Yes, I know Django frowns upon that sort of thing, and yes, I know they prefer you use the ImageField or FileField for that, but suffice it to say, that's impractical for my application.
如何使用 Django 的 ORM 和 PostgreSQL 后端存储二进制数据的“blob”?是的,我知道 Django 不喜欢这种事情,是的,我知道他们更喜欢你使用 ImageField 或 FileField ,但我只想说,这对我的应用程序来说是不切实际的。
I've tried hacking it by using a TextField, but I get occassional errors when my binary data doesn't strictly confirm to the models encoding type, which is unicode by default. e.g.
我试过使用 TextField 来破解它,但是当我的二进制数据没有严格确认模型编码类型时,我会偶尔出现错误,默认情况下是 unicode。例如
psycopg2.DataError: invalid byte sequence for encoding "UTF8": 0xe22665
采纳答案by Spacedman
This snippet any good:
这个片段有什么好处:
http://djangosnippets.org/snippets/1597/
http://djangosnippets.org/snippets/1597/
This is possibly the simplest solution for storing binary data in a TextField.
这可能是在 TextField 中存储二进制数据的最简单的解决方案。
import base64
from django.db import models
class Foo(models.Model):
_data = models.TextField(
db_column='data',
blank=True)
def set_data(self, data):
self._data = base64.encodestring(data)
def get_data(self):
return base64.decodestring(self._data)
data = property(get_data, set_data)
There's a couple of other snippets there that might help.
还有一些其他片段可能会有所帮助。
回答by Anurag Uniyal
I have been using this simple field for 'mysql' backend, you can modify it for other backends
我一直在为'mysql'后端使用这个简单的字段,你可以为其他后端修改它
class BlobField(models.Field):
description = "Blob"
def db_type(self, connection):
return 'blob'
回答by Ben Roberts
Also, check out Django Storages' Database Storage:.
另外,请查看Django Storages 的数据库存储:。
I haven't used it yet, but it looks awesome and I'm going to start using it as soon as I Post My Answer.
我还没有使用它,但它看起来很棒,我将在发布我的答案后立即开始使用它。
回答by Sarah Messer
If you're using Django >= 1.6, there's a BinaryField
如果您使用的是 Django >= 1.6,则有一个BinaryField

