python – Django模型：ValueError：缺少staticfiles清单“file_name.ext”的条目

在将其标记为重复之前,我已阅读ValueError: Missing staticfiles manifest entry for ‘favicon.ico’

,但它无法解决我的问题.

我有以下型号：

from django.contrib.staticfiles.templatetags.staticfiles import static

class Profile(models.Model):
    user = models.ForeignKey(SocialUser, on_delete=models.PROTECT)
    avatar_url = models.URLField(
        default=static('pledges/images/no-profile-photo.png'))

我正在使用Codeship for CI,当我运行时：

$python manage.py collectstatic --noinput

我收到以下错误：

Traceback (most recent call last):
File "manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
utility.execute()
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/site-packages/django/core/management/__init__.py", line 338, in execute
django.setup()
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/site-packages/django/__init__.py", line 27, in setup
apps.populate(settings.INSTALLED_APPS)
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/site-packages/django/apps/registry.py", line 108, in populate
app_config.import_models()
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/site-packages/django/apps/config.py", line 202, in import_models
self.models_module = import_module(models_module_name)
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/home/rof/src/github.com/company-name/project-name/pledges/models.py", line 106, in <module>
class Profile(models.Model):
File "/home/rof/src/github.com/company-name/project-name/pledges/models.py", line 109, in Profile
default=static('pledges/images/no-profile-photo.png'))
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/site-packages/django/contrib/staticfiles/templatetags/staticfiles.py", line 12, in static
return _static(path)
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/site-packages/django/templatetags/static.py", line 166, in static
return StaticNode.handle_simple(path)
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/site-packages/django/templatetags/static.py", line 117, in handle_simple
return staticfiles_storage.url(path)
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/site-packages/django/contrib/staticfiles/storage.py", line 162, in url
return self._url(self.stored_name, name, force)
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/site-packages/django/contrib/staticfiles/storage.py", line 141, in _url
hashed_name = hashed_name_func(*args)
File "/home/rof/.pyenv/versions/3.6/lib/python3.6/site-packages/django/contrib/staticfiles/storage.py", line 432, in stored_name
raise ValueError("Missing staticfiles manifest entry for '%s'" % clean_name)
ValueError: Missing staticfiles manifest entry for 'pledges/images/no-profile-photo.png'

我本地没有问题,所以我想知道是什么导致了这个问题以及如何解决它.我从代码中理解的是,我不能将函数static用于模型字段.

有人知道怎么弄清楚这个吗？有人可以解释一下为什么会这样吗？

解决方法:

解：

您可以通过将static()调用移出模型字段并将默认值更改为字符串“pledges / images / no-profile-photo.png”来避免此问题并改进代码.它应该如下所示：

avatar_url = models.URLField(默认=’pledges / images / no-profile-photo.png’)

当您访问avatar_url时,请使用其中之一

>(前端/ Django模板选项){％static profile_instance.avatar_url％},其中profile_instance是引用Profile对象的上下文变量.
>(backend / Python选项)使用static(profile_instance.avatar_url).

说明：

通过使用static()的结果作为默认值,应用程序在数据库中放置一个包含STATIC_URL前缀的URL – 这就像硬编码一样,因为在settings.py时数据不会改变.更一般地说,您根本不应将static()的结果存储在数据库中.

如果您确保每次访问avatar_url以在前端显示时使用{％static％}标记或static()函数,则仍会在运行时根据您的环境配置添加STATIC_URL.

This SO thread has a lot of good content on staticfiles

为什么会发生错误：

看起来你有一个循环依赖：

> collectstatic需要运行才能创建manifest.json
>您的应用程序需要加载才能运行manage.py命令,该命令调用static()
> static()依赖manifest.json中的条目来解析.

标签：django-staticfiles,python,django,django-models
来源： https://codeday.me/bug/20191003/1849331.html