Python 如何在单击按钮时调用 Django 函数？
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How do I call a Django function on button click?
提问by Dev
I am trying to write a Django application and I am stuck at how I can call a view function when a button is clicked.
我正在尝试编写一个 Django 应用程序，但我被困在单击按钮时如何调用视图函数。
In my template, I have a link button as below, when clicked it takes you to a different webpage:
在我的模板中，我有一个链接按钮，如下所示，单击它会将您带到不同的网页：
<a target="_blank" href="{{ column_3_item.link_for_item }}">Check It Out</a>
When the button is clicked, I also want to call a Django view function (along with re-direct to a target website). The view function increments the value in the database which stores the number of times the button is clicked.
单击按钮时，我还想调用 Django 视图函数（以及重定向到目标网站）。视图函数增加数据库中存储按钮被点击次数的值。
The column_3_item.link_for_itemis a link to an external website (e.g. www.google.com). Right now when that button is clicked, it opens a new window which takes you to the google website.
这column_3_item.link_for_item是指向外部网站（例如www.google.com）的链接。现在，当单击该按钮时，它会打开一个新窗口，将您带到 google 网站。
What I would like to do is to call a Django view function also when the button is clicked which updates the database without refreshing the page. How I can achieve this?
我想做的是在单击按钮时调用 Django 视图函数，该按钮更新数据库而不刷新页面。我怎么能做到这一点？
采纳答案by furins
here is a pure-javascript, minimalistic approach. I use JQuery but you can use any library (or even no libraries at all).
这是一种纯javascript的简约方法。我使用 JQuery，但您可以使用任何库（甚至根本不使用库）。
<html>
<head>
<title>An example</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script>
function call_counter(url, pk) {
window.open(url);
$.get('YOUR_VIEW_HERE/'+pk+'/', function (data) {
alert("counter updated!");
});
}
</script>
</head>
<body>
<button onclick="call_counter('http://www.google.com', 12345);">
I update object 12345
</button>
<button onclick="call_counter('http://www.yahoo.com', 999);">
I update object 999
</button>
</body>
</html>
Alternative approach
替代方法
Instead of placing the JavaScript code, you can change your link in this way:
您可以通过以下方式更改链接，而不是放置 JavaScript 代码：
<a target="_blank"
class="btn btn-info pull-right"
href="{% url YOUR_VIEW column_3_item.pk %}/?next={{column_3_item.link_for_item|urlencode:''}}">
Check It Out
</a>
and in your views.py:
并在您的views.py：
def YOUR_VIEW_DEF(request, pk):
YOUR_OBJECT.objects.filter(pk=pk).update(views=F('views')+1)
return HttpResponseRedirect(request.GET.get('next')))
回答by Mahshid Zeinaly
The following answer could be helpful for the first part of your question:
以下答案可能对您问题的第一部分有所帮助：
回答by Sourabh Sinha
There are 2 possible solutions that I personally use
我个人使用了两种可能的解决方案
1.without using form
1.不使用表格
<button type="submit" value={{excel_path}} onclick="location.href='{% url 'downloadexcel' %}'" name='mybtn2'>Download Excel file</button>
2.Using Form
2.使用表格
<form action="{% url 'downloadexcel' %}" method="post">
{% csrf_token %}
<button type="submit" name='mybtn2' value={{excel_path}}>Download results in Excel</button>
</form>
Where urls.py should have this
urls.py 应该有这个
path('excel/',views1.downloadexcel,name="downloadexcel"),
