javascript 在 Django 表单中动态显示和隐藏字段

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时间:2020-10-26 23:38:26  来源:igfitidea点击:

Show and hide dynamically fields in Django form

javascriptdjangoforms

提问by Nikolay Kovalenko

I have a form in Django:

我在 Django 中有一个表单:

views.py:

视图.py:

class SearchForm(forms.Form):
    type = forms.ChoiceField(choices = ...)
    list1 = forms.ModelMultipleChoiceField(...)
    list2 = forms.ModelMultipleChoiceField(...)

home.htm:

主页.htm:

<td valign='top'>{{ form.type }}</td>
<td valign='top'>{{ form.list1 }}</td>
<td valign='top'>{{ form.list2 }}</td>
<td valign='top'><input type="submit" value="Find" /></td>

I want the list1 element to be shown and the list2 to be hide if type is 1 and vice versa in case type is 2. I want them to be hide and shown dynamically without reloading the page or any interaction with the server.

我希望显示 list1 元素,如果 type 为 1,则隐藏 list2,如果 type 为 2,则反之亦然。我希望它们被隐藏和动态显示,而无需重新加载页面或与服务器进行任何交互。

I believe Javascript could be useful here, but I don't know it.

我相信 Javascript 在这里很有用,但我不知道。

采纳答案by Andrew Kloos

Try this...

试试这个...

<script>function Hide()
{
    if(document.getElementById('mainselect').options[document.getElementById('mainselect').selectedIndex].value == "1")
    {
         document.getElementById('a').style.display = 'none';
         document.getElementById('b').style.display = '';
    }else
    {
         document.getElementById('a').style.display = '';
         document.getElementById('b').style.display = 'none'
    }
}
</script>
<td valign='top'><select id="mainselect" onchange="Hide()"><option value="1">1</option><option value="2">2</option></select></td>
<td valign='top' id='a'>{{ form.list1 }}</td>
<td valign='top' id='b'>{{ form.list2 }}</td>
<td valign='top'><input type="submit" value="Find" /></td>

回答by Lukas Bünger

This is an adaption of Andrew's Javascript solution, using Django forms the way you'd usually expect.

这是对 Andrew 的 Javascript 解决方案的改编,以您通常期望的方式使用 Django 表单。

The form in Django / Python:

Django / Python 中的表单:

class SearchForm(forms.Form):
    type = forms.ChoiceField(choices = ((1, 'One'), (2, 'Two')))

    # Use any form fields you need, CharField for simplicity reasons
    list1 = forms.CharField()
    list2 = forms.CharField()

The template, assuming an instance of SearchFormgot passed to the template context with the name 'form':

模板,假设一个实例SearchForm被传递给名为“form”的模板上下文:

<script>
function Hide() {
    if(document.getElementById('id_type').options[document.getElementById('id_type').selectedIndex].value == "1") {
         document.getElementById('id_list1').style.display = 'none';
         document.getElementById('id_list2').style.display = '';
    } else {
         document.getElementById('id_list1').style.display = '';
         document.getElementById('id_list2').style.display = 'none';
    }
}

window.onload = function() {
    document.getElementById('id_type').onchange = Hide;
};
</script>

<div>
    {{ form.type.label_tag }}{{ form.type }}
</div>
<div>
    {{ form.list1.label_tag }}{{ form.list1 }}
</div>
<div>
    {{ form.list2.label_tag }}{{ form.list2 }}
</div>