Django模板 - 动态变量名 [英] Django template - dynamic variable name

问题描述

下午好，

如何在Django模板中使用变量名？

How can I use a variable variable name in Django templates?

我有使用上下文， has_perm 的自定义身份验证系统进行检查，以查看用户是否可以访问指定的部分。

I have a custom auth system using context, has_perm checks to see if the user has access to the specified section.

deptauth 是一个带有限制组名称的变量，即SectionAdmin。我认为 has.perm 实际上是检查'deptauth'而不是变量值 SectionAdmin

deptauth is a variable with a restriction group name i.e SectionAdmin. I think has.perm is actually checking for 'deptauth' instead of the variable value SectionAdmin as I would like.

{%if has_perm.deptauth %}

我该怎么做？ has_perm。{{depauth}} 或沿着这些行的东西

How can I do that? has_perm.{{depauth}} or something along those lines?

编辑 - 更新代码

{% with arg_value="authval" %}
{% lookup has_perm "admintest" %}
{% endwith %}

{%if has_perm.authval %}
window.location = './portal/tickets/admin/add/{{dept}}/'+val;   
{% else %}
window.location = './portal/tickets/add/{{dept}}/'+val; 
{%endif%}     

has_perm不是一个对象..它在我的上下文处理器（permchecker）：

has_perm isn't an object.. it's in my context processor (permchecker):

class permchecker(object):

def __init__(self, request):
    self.request = request
    pass

def __getitem__(self, perm_name):
    return check_perm(self.request, perm_name)  

推荐答案

你最好写自己的自定义模板标签。这样做并不难，而且对于这种情况也是正常的。

You're best off writing your own custom template tag for that. It's not difficult to do, and normal for this kind of situation.

我还没有测试过这个，但这些方面的东西应该可以工作。记住正确处理错误！

I have not tested this, but something along these lines should work. Remember to handle errors properly!

def lookup(object, property):
    return getattr(object, property)()

register.simple_tag(lookup)

如果你试图获取属性而不是执行一个方法，删除那些（）。

If you're trying to get a property rather than execute a method, remove those ().

并使用它：

{% lookup has_perm "depauth" %}

注意 has_perm 是一个变量，而depauth是一个字符串值。这将通过字符串进行查找，即get has_perm.depauth 。

Note that has_perm is a variable, and "depauth" is a string value. this will pass the string for lookup, i.e. get has_perm.depauth.

您可以使用变量调用它：

You can call it with a variable:

{% with arg_value="depauth_other_value" %}
    {% lookup has_perm arg_value %}
{% endwith %}

这意味着变量的值将用于查找，即 has_perm.depauth_other_value '。

which means that the value of the variable will be used to look it up, i.e. has_perm.depauth_other_value'.

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