我有一些东西在设置。py,我想能够从模板访问,但我不知道如何做到这一点。我已经试过了
{{CONSTANT_NAME}}
但这似乎并不奏效。这可能吗?
我有一些东西在设置。py,我想能够从模板访问,但我不知道如何做到这一点。我已经试过了
{{CONSTANT_NAME}}
但这似乎并不奏效。这可能吗?
当前回答
我发现最简单的方法是一个自定义模板标签:
from django import template
from django.conf import settings
register = template.Library()
# settings value
@register.simple_tag
def settings_value(name):
return getattr(settings, name, "")
用法:
{% settings_value "LANGUAGE_CODE" %}
其他回答
如果使用基于类的视图:
#
# in settings.py
#
YOUR_CUSTOM_SETTING = 'some value'
#
# in views.py
#
from django.conf import settings #for getting settings vars
class YourView(DetailView): #assuming DetailView; whatever though
# ...
def get_context_data(self, **kwargs):
context = super(YourView, self).get_context_data(**kwargs)
context['YOUR_CUSTOM_SETTING'] = settings.YOUR_CUSTOM_SETTING
return context
#
# in your_template.html, reference the setting like any other context variable
#
{{ YOUR_CUSTOM_SETTING }}
我发现最简单的方法是一个自定义模板标签:
from django import template
from django.conf import settings
register = template.Library()
# settings value
@register.simple_tag
def settings_value(name):
return getattr(settings, name, "")
用法:
{% settings_value "LANGUAGE_CODE" %}
我喜欢Berislav的解决方案,因为在简单的网站上,它干净有效。我不喜欢的是随意地暴露所有的设置常数。所以我最后是这样做的:
from django import template
from django.conf import settings
register = template.Library()
ALLOWABLE_VALUES = ("CONSTANT_NAME_1", "CONSTANT_NAME_2",)
# settings value
@register.simple_tag
def settings_value(name):
if name in ALLOWABLE_VALUES:
return getattr(settings, name, '')
return ''
用法:
{% settings_value "CONSTANT_NAME_1" %}
This protects any constants that you have not named from use in the template, and if you wanted to get really fancy, you could set a tuple in the settings, and create more than one template tag for different pages, apps or areas, and simply combine a local tuple with the settings tuple as needed, then do the list comprehension to see if the value is acceptable. I agree, on a complex site, this is a bit simplistic, but there are values that would be nice to have universally in templates, and this seems to work nicely. Thanks to Berislav for the original idea!
If we were to compare context vs. template tags on a single variable, then knowing the more efficient option could be benificial. However, you might be better off to dip into the settings only from templates that need that variable. In that case it doesn't make sense to pass the variable into all templates. But if you are sending the variable into a common template such as the base.html template, Then it would not matter as the base.html template is rendered on every request, so you can use either methods.
如果您决定使用template tags选项,那么使用下面的代码,因为它允许您传入一个默认值,以防有问题的变量未定义。
例如:get_from_settings my_variable as my_context_value
例如:get_from_settings my_variable my_default as my_context_value
class SettingsAttrNode(Node):
def __init__(self, variable, default, as_value):
self.variable = getattr(settings, variable, default)
self.cxtname = as_value
def render(self, context):
context[self.cxtname] = self.variable
return ''
def get_from_setting(parser, token):
as_value = variable = default = ''
bits = token.contents.split()
if len(bits) == 4 and bits[2] == 'as':
variable = bits[1]
as_value = bits[3]
elif len(bits) == 5 and bits[3] == 'as':
variable = bits[1]
default = bits[2]
as_value = bits[4]
else:
raise TemplateSyntaxError, "usage: get_from_settings variable default as value " \
"OR: get_from_settings variable as value"
return SettingsAttrNode(variable=variable, default=default, as_value=as_value)
get_from_setting = register.tag(get_from_setting)
将这段代码添加到名为context_processors.py的文件中:
from django.conf import settings as django_settings
def settings(request):
return {
'settings': django_settings,
}
然后,在你的设置文件中,包括一个路径,如'speed .core.base.context_processors。在TEMPLATES中的context_processors设置中的settings'(包含你的应用程序名称和路径)。
(例如,你可以看到settings/base.py和context_processors.py)。
然后可以在任何模板代码中使用特定的设置。例如:
{% if settings.SITE_ID == settings.SPEEDY_MATCH_SITE_ID %}
更新:上面的代码向模板公开了所有设置,包括敏感信息,如SECRET_KEY。黑客可能滥用此特性在模板中显示此类信息。如果你只想将特定的设置暴露给模板,请使用下面的代码:
def settings(request):
settings_in_templates = {}
for attr in ["SITE_ID", ...]: # Write here the settings you want to expose to the templates.
if (hasattr(django_settings, attr)):
settings_in_templates[attr] = getattr(django_settings, attr)
return {
'settings': settings_in_templates,
}