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
我稍微改进了chrisdew的答案(创建自己的标签)。
首先，创建文件yourapp/templatetags/value_from_settings.py，在其中定义你自己的新标签value_from_settings:
from django.template import TemplateSyntaxError, Variable, Node, Variable, Library
from yourapp import settings
register = Library()
# I found some tricks in URLNode and url from defaulttags.py:
# https://code.djangoproject.com/browser/django/trunk/django/template/defaulttags.py
@register.tag
def value_from_settings(parser, token):
bits = token.split_contents()
if len(bits) < 2:
raise TemplateSyntaxError("'%s' takes at least one " \
"argument (settings constant to retrieve)" % bits[0])
settingsvar = bits[1]
settingsvar = settingsvar[1:-1] if settingsvar[0] == '"' else settingsvar
asvar = None
bits = bits[2:]
if len(bits) >= 2 and bits[-2] == 'as':
asvar = bits[-1]
bits = bits[:-2]
if len(bits):
raise TemplateSyntaxError("'value_from_settings' didn't recognise " \
"the arguments '%s'" % ", ".join(bits))
return ValueFromSettings(settingsvar, asvar)
class ValueFromSettings(Node):
def __init__(self, settingsvar, asvar):
self.arg = Variable(settingsvar)
self.asvar = asvar
def render(self, context):
ret_val = getattr(settings,str(self.arg))
if self.asvar:
context[self.asvar] = ret_val
return ''
else:
return ret_val
你可以通过以下方式在模板中使用这个标签:
{% load value_from_settings %}
[...]
{% value_from_settings "FQDN" %}
或通过
{% load value_from_settings %}
[...]
{% value_from_settings "FQDN" as my_fqdn %}
as的优点是…这使得它很容易通过一个简单的{{my_fqdn}}在blocktrans块中使用。
其他回答
一个更完整的实现。
/项目/ settings.py
APP_NAME = 'APP'
- app - templatetags settings_value . py
from django import template
from django.conf import settings
register = template.Library()
@register.simple_tag
def settings_value(name):
return getattr(settings, name, "")
/app/templates/index.html
<!DOCTYPE html>
{% load static %}
{% load settings_value %}
<head>
<title>{% settings_value "APP_NAME" %}</title>
...
我稍微改进了chrisdew的答案(创建自己的标签)。
首先，创建文件yourapp/templatetags/value_from_settings.py，在其中定义你自己的新标签value_from_settings:
from django.template import TemplateSyntaxError, Variable, Node, Variable, Library
from yourapp import settings
register = Library()
# I found some tricks in URLNode and url from defaulttags.py:
# https://code.djangoproject.com/browser/django/trunk/django/template/defaulttags.py
@register.tag
def value_from_settings(parser, token):
bits = token.split_contents()
if len(bits) < 2:
raise TemplateSyntaxError("'%s' takes at least one " \
"argument (settings constant to retrieve)" % bits[0])
settingsvar = bits[1]
settingsvar = settingsvar[1:-1] if settingsvar[0] == '"' else settingsvar
asvar = None
bits = bits[2:]
if len(bits) >= 2 and bits[-2] == 'as':
asvar = bits[-1]
bits = bits[:-2]
if len(bits):
raise TemplateSyntaxError("'value_from_settings' didn't recognise " \
"the arguments '%s'" % ", ".join(bits))
return ValueFromSettings(settingsvar, asvar)
class ValueFromSettings(Node):
def __init__(self, settingsvar, asvar):
self.arg = Variable(settingsvar)
self.asvar = asvar
def render(self, context):
ret_val = getattr(settings,str(self.arg))
if self.asvar:
context[self.asvar] = ret_val
return ''
else:
return ret_val
你可以通过以下方式在模板中使用这个标签:
{% load value_from_settings %}
[...]
{% value_from_settings "FQDN" %}
或通过
{% load value_from_settings %}
[...]
{% value_from_settings "FQDN" as my_fqdn %}
as的优点是…这使得它很容易通过一个简单的{{my_fqdn}}在blocktrans块中使用。
我发现这是Django 1.3最简单的方法:
views.py 从local_settings导入BASE_URL def根(请求): 返回render_to_response('hero.html'， {'BASE_URL': BASE_URL}) hero.html var BASE_URL = '{{JS_BASE_URL}}';
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!
如果有人像我一样发现了这个问题，那么我将发布我的解决方案，它适用于Django 2.0:
这个标记将一些settings.py变量值赋给模板的变量:
用法:{% get_settings_value template_var "SETTINGS_VAR" %}
应用程序/ templatetags / my_custom_tags.py:
from django import template
from django.conf import settings
register = template.Library()
class AssignNode(template.Node):
def __init__(self, name, value):
self.name = name
self.value = value
def render(self, context):
context[self.name] = getattr(settings, self.value.resolve(context, True), "")
return ''
@register.tag('get_settings_value')
def do_assign(parser, token):
bits = token.split_contents()
if len(bits) != 3:
raise template.TemplateSyntaxError("'%s' tag takes two arguments" % bits[0])
value = parser.compile_filter(bits[2])
return AssignNode(bits[1], value)
你的模板:
{% load my_custom_tags %}
# Set local template variable:
{% get_settings_value settings_debug "DEBUG" %}
# Output settings_debug variable:
{{ settings_debug }}
# Use variable in if statement:
{% if settings_debug %}
... do something ...
{% else %}
... do other stuff ...
{% endif %}
查看Django如何创建自定义模板标签的文档:https://docs.djangoproject.com/en/2.0/howto/custom-template-tags/
推荐文章
- 获取对象的Django管理url
- Django可选url参数
- 我如何提高一个响应禁止在django
- 使用Django South进行向后迁移
- 如何访问Django模板中的字典元素?
- Pylint在Visual Studio代码中“未解决的导入”错误
- 如何更改Django应用程序的名称?
- 在django的form字段中默认创建空的queryset
- 在django模型自定义save()方法中，你应该如何识别一个新对象?
- 从URL中获取参数
- PYTHONUNBUFFERED在docker文件中的用途是什么?
- 类没有对象成员
- Django模型“没有显式声明app_label”
- 如何在django模板中连接字符串?
- 我如何在Django中添加一个CharField占位符?
