Question

目前，我有以下2个下拉菜单来显示年份和周，但我想分别在这些菜单中显示当前年份和当前周。

Django表格

from django import forms

class DropDownMenuForm(forms.Form):
    week = forms.ChoiceField(choices=[(x,x) for x in range (1,53)])
    year = forms.ChoiceField(choices=[(x,x) for x in range (2016,2021)])

显示菜单的模板

<form id="search_dates" method="POST" action="{{ action }}"> {% csrf_token %}
    <div class="row">
        <div style="display:inline-block">
            <h6>Select year</h6>
                <select name="select_year">
                    <option value={{form.year}}></option>
                </select>
        </div>
        <div style="display:inline-block">
            <h6>Select week</h6>
            <select name="select_week">
                <option value={{form.week}}></option>
            </select>
        </div>
      <button type="submit">Search</button>
    </div>
</form>

显示当前周和年

from datetime import date
date.today().isocalendar()[1]
date.today().year

如何连接显示当前周和年代码与模板，以便在下拉菜单中查看当前年份和周？

Answer 1

您可以为表单字段设置initial值：

from datetime import date
from django import forms

class DropDownMenuForm(forms.Form):
    week = forms.ChoiceField(choices=[(x,x) for x in range (1,53)], initial=date.today().isocalendar()[1])
    year = forms.ChoiceField(choices=[(x,x) for x in range (2016,2021)], initial=date.today().year)

Answer 2

您可以使用initial =“”属性设置默认值。请参阅Django Docs

中的示例

Django Docs

from django import forms
class CommentForm(forms.Form):
    name = forms.CharField(initial='Your name')
    url = forms.URLField(initial='http://')
    comment = forms.CharField()
f = CommentForm(auto_id=False)
print(f)
<tr><th>Name:</th><td><input type="text" name="name" value="Your name" required /></td></tr>
<tr><th>Url:</th><td><input type="url" name="url" value="http://" required /></td></tr>
<tr><th>Comment:</th><td><input type="text" name="comment" required />
</td></tr>

如何在Django中设置下拉菜单的默认值？

2 个答案: