Python Django。如何在name_znat字段中使用下拉元素输入用户选择的文本

Question

有一个包含下拉元素的html表单：

<form method = "POST" action = "{% url 'create_group_handler'%}">
<select name = "select"> <! - Add an identifier here instead of using 'name' ->
<option value = "value1"> Value 1 </ option>
<option value = "value2" selected> Value 2 </ option>
<option value = "value3"> Value 3 </ option>
</ select>
</ form>

还有一个Python django模型：

Znat Class (models.Model):
 name_znat = models.CharField ('Name znat', max_length = 200)

假设用户选择了文本为“Value 2”的下拉元素。 如何在name_znat字段中使用下拉元素输入用户选择的文本

Answer 1

使用ModelForm，请参见https://docs.djangoproject.com/en/3.0/topics/class-based-views/generic-editing/#model-forms。最大限度地利用Django的内置功能。祝你好运

models.py：

class Znat (models.Model):
    CHOICES = (
        ('value1', 'Value 1'),
        ('value2', 'Value 2'),
        ('value3', 'Value 3'),
    )
    name_znat = models.CharField ('Name znat', max_length = 200, choices=CHOICES)

forms.py：

class CreateZnatForm(ModelForm):
    class Meta:
        model = Znat
        fields = ('name_znat')
        widgets = {
            'name_znat': forms.Select(attrs={'class': 'form-control'}),
        }

views.py：

class ZnatCreate(CreateView):
    model = Znat
    fields = ['name_znat']

URL.py：

urlpatterns = [
    path('znat/', ZnatCreate.as_view(), name='create_group_handler'),
]

Answer 2

您可以通过使用request.POST.get来获取选择框值，其中所有提交的数据都是

views.py

def myview(request):
    if request.method == "POST":
        selected_option = request.POST.get('select')
        Znat.objects.create(name_znat=selected_option)
    return redirect("/")

此外，无论何时使用表单，都应该有{% csrf_token %}。除非您的视图已明确标记为csrf_exempt。你可以阅读关于importance of CSRF Tokens here.

<form method = "POST" action = "{% url 'create_group_handler'%}">
{% csrf_token %}
<select name = "select"> <! - Add an identifier here instead of using 'name' ->
<option value = "value1"> Value 1 </ option>
<option value = "value2" selected> Value 2 </ option>
<option value = "value3"> Value 3 </ option>
</ select>
</ form>