在 Django url 模板标签中获取 javascript 变量的值
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Get javascript variable's value in Django url template tag
提问by Mike Lee
It is known that there's a DRY way of directing to an URL by using django template tag "url", say
众所周知，有一种使用 django 模板标签“url”定向到 URL 的 DRY 方式，例如
{% url "someview" arg1=X %}
Here, I want "X" to be the value of a javascript variable, say tmp. But the following doesn't work
在这里，我希望“X”是一个 javascript 变量的值，比如tmp. 但以下不起作用
<script>
...{% url "someview" arg1=tmp %}...
</script>
How should I get the value inside a template tag?
我应该如何获取模板标签内的值？
回答by Mike Lee
I found a trick that might work under most circumstances:
我发现了一个在大多数情况下可能有效的技巧：
var url_mask = "{% url 'someview' arg1=12345 %}".replace(/12345/, tmp.toString());
It's clean, and it doesn't break DRY principle.
它很干净，而且不违反 DRY 原则。
回答by Olfredos6
Just making it clear so next readers can have a comprehensive solution. In regard to the question, this is how I used Mike Lee solution for an example case which is redirecting with Javascript to a new page with a parameter in a variable named tmp:
只是说清楚，以便下一位读者可以有一个全面的解决方案。关于这个问题，这是我如何将 Mike Lee 解决方案用于示例案例，该案例使用 Javascript 重定向到一个新页面，该页面的参数位于名为tmp的变量中：
window.location = "{% url 'your_view_name' 1234 %}".replace(/1234/, tmp.toString());
回答by Moayyad Yaghi
one easy way to do this is
一种简单的方法是
<div id="test" style="display: none;">
{% url 'some_url:some_sub_url'%}
</div>
<script>
url_mask = $( "#test" ).html()
</script>
回答by Brandon
I don't think you'll be able to use a named argument to {% url %}from JavaScript, however you could do a positional argument or querystring parameter:
我认为您不能使用{% url %}来自 JavaScript的命名参数，但是您可以使用位置参数或查询字符串参数：
<script type="text/javascript">
var tmp = window.location.hash, //for example
url = {% url '[url_name]' %} + tmp + '/';
</script>
But, you could only do that once, when the template is initially rendered.
但是，您只能在最初呈现模板时执行一次。
回答by Victor Tax
var name = "{% url 'your_view_name' pk=0 %}".replace('0', name_variable);
回答by santiagopim
Similar solution with concatinstead of replace, so you avoid the idclash:
类似的解决方案，concat而不是replace，这样你就可以避免id冲突：
var pre_url = "{% url 'topology_json' %}";
var url = pre_url.concat(tool_pk, '/', graph_depth, '/');
But you need a non-parameter url to keep Django pleasant with the pre_urlbecause the loading-time evaluation, my urls.pyis:
但是你需要一个非参数 url 来让 Django 满意，pre_url因为加载时间评估，我urls.py是：
urlpatterns = [
url(r'^topology_json/$',
views.topology_json,
name='topology_json'),
url(r'^topology_json/(?P<tool_id>[0-9]+)/(?P<depth>[0-9]+)/$',
views.topology_json,
name='topology_json'),
...
]
And parameters in view have suitable default values, so views.py:
并且视图中的参数具有合适的默认值，因此views.py：
def topology_json(request, tool_id=None, depth=1):
"""
JSON view returns the graph in JSON format.
"""
if tool_id:
tool = get_object_or_404(Tool, pk=tool_id)
topology = get_graph(str(tool), int(depth))
else:
...
Django yet 1.11 here.
Django 1.11 在这里。
