Django从url保存图片并与ImageField连接
Django从url保存图片并与ImageField连接
提问于 2013-05-05 11:55:16
我在models.py中有
class Item(models.Model):
image_file = models.ImageField(upload_to='images')
image_url = models.URLField()我希望django自动下载和本地保存图像从image_url和连接它与image_file
应该如何行动：
- I Paste
https://docs.djangoproject.com/s/img/site/hdr_logo.gifinimage_urlfield In admin - 单击"save"
- In templates write
<img src="{{ item.image_file.url }}">。它显示来自我的服务器的图像，而不是djangoproject.com
我尝试过的东西：
我已经覆盖了Item类的save方法。我通过urllib在本地保存了图像，但我坚持将保存的图像与image_file字段连接起来
回答 4
Stack Overflow用户
回答已采纳
发布于 2013-05-05 17:24:24
from django.core.files import File
import os
class Item(models.Model):
image_file = models.ImageField(upload_to='images')
image_url = models.URLField()
...
def get_remote_image(self):
if self.image_url and not self.image_file:
result = urllib.urlretrieve(self.image_url)
self.image_file.save(
os.path.basename(self.image_url),
File(open(result[0]))
)
self.save()您可以覆盖默认的save()方法以自动调用get_remote_image()。
请参阅：https://docs.djangoproject.com/en/dev/topics/db/models/#overriding-model-methods
Stack Overflow用户
发布于 2018-10-08 00:01:27
from django.db import models
from django.core.files import File
from urllib.request import urlopen
from tempfile import NamedTemporaryFile
class Item(models.Model):
image_file = models.ImageField(upload_to='images')
image_url = models.URLField()
...
def get_remote_image(self):
if self.image_url and not self.image_file:
img_temp = NamedTemporaryFile(delete=True)
img_temp.write(urlopen(self.image_url).read())
img_temp.flush()
self.image_file.save(f"image_{self.pk}", File(img_temp))
self.save()该解决方案避免了在url处理期间接收到的任何utf-8错误。
它只能与python 3.6+一起使用，因为f字符串。
请查看此链接：https://twigstechtips.blogspot.com/2012/04/django-programmatically-saving-image.html
Stack Overflow用户
发布于 2017-12-28 07:17:06
对于python3
from django.core.files import File
from urllib import request
import os
class Item(models.Model):
image_file = models.ImageField(upload_to='images')
image_url = models.URLField()
...
def get_remote_image(self):
if self.image_url and not self.image_file:
result = request.urlretrieve(self.image_url)
self.image_file.save(
os.path.basename(self.image_url),
File(open(result[0], 'rb'))
)
self.save()页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/16381241
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