脆皮表单：用于拆分表单的FormHelper /两列相同的模型

Question

“我的模板”分为两列。 我只有一个模型，但目的是将表单分为两部分，第一列中的一部分，第二列中的另一部分。我旨在将FormHelper用于脆皮表单。

可用的文档给出了一个隐秘的提示，但是没有任何示例，这种解释的尝试有点不足。

https://django-crispy-forms.readthedocs.io/en/d-0/tags.html#rendering-several-forms-with-helpers

  

使用助手呈现几种形式

     

我们经常被问到：“如何渲染两个或多个表单，以及它们的   各自的助手，使用{％crispy％}标签，但没有标签   呈现两次？” 容易，您需要将form_tag helper属性设置为   在每个助手中都是错误的：

self.helper.form_tag = False

     

然后，您将不得不编写一些围绕   形式：

<form action="{% url submit_survey %}" class="uniForm" method="post">
    {% crispy first_form %}
    {% crispy second_form %}
</form>

更新：这篇文章解释了Crispy文档的通行证 Define crispy forms context names for two forms in one

下面是我的代码。两个FormHelper将模型分为两部分，第一部分包含字段：['car_model_make', 'status_is_secondhand'] 第二部分包含字段：['seller', 'buyer']

我一直在寻找一种“呼叫”特定{% crispy form %}的方法。给定“帮助”文档”，则它们看起来像{% crispy product-modelform_1 %}和{% crispy product-modelform_2 %}，这是行不通的。

# models.py
class Product(models.Models):
    car_model_make = models.CharField(default='B', max_length=1, blank=True, choices=CAR_TYPE)
    status_is_secondhand = models.BooleanField(blank=True)
    seller = models.CharField(max_length=50, blank=True, choices=SELLER_TYPE)
    buyer = models.CharField(max_length=50, blank=True, choices=BUYER_TYPE)

# forms.py
class ProductForm(ModelForm):
    class Meta:
        model = Product
        fields = ('__all__')

    def __init__(self, *args, **kwargs):
        super(ProductForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.form_class = 'form-horizontal'
        self.helper.label_class = 'col-sm-4'
        self.helper.field_class = 'col-sm-8'
        self.helper.form_id = 'product-modelform'
        self.helper.form_tag = False


        model = 'car_model_make'
        secondhand = 'status_is_secondhand'

        self.fields[model].label = "Model"
        self.fields[secondhand].label = "Is Secondhand"

        self.helper.layout = Layout(
            Field(model),
            Field(secondhand),
            )

    def __init__(self, *args, **kwargs):
        super(ProductForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.form_class = 'form-horizontal'
        self.helper.label_class = 'col-sm-4'
        self.helper.field_class = 'col-sm-8'
        self.helper.form_id = 'product-modelform'
        self.helper.form_tag = False


        seller = 'seller'
        buyer = 'buyer'

        self.fields[seller].label = "Seller"
        self.fields[buyer].label = "buyer"

        self.helper.layout = Layout(
            Field(seller),
            Field(buyer),
            )

# views.py
class ProductFormView(FormView):
    form_class = ProductForm

    def form_valid(self, form):
        form.save()
        return super().form_valid(form)

    def get_success_url(self):
        return reverse('index')

# urls.py
urlpatterns = [
    path('', index, name='index'),
    path('product/', ProductFormView.as_view(template_name='product/product.html'),


# html template

{% extends "product/base.html" %}
{% load crispy_forms_tags %}

{% block col8_content %}
<form id="product-modelform" method="post">
    {% csrf_token %}
    {% crispy form %}
    {% endblock col8_content %}
    {% block col4_content %}   
</form>
    {% endblock col4_content %}
    <input type="submit" value="Submit">

Answer 1

您不能有两个$dateString = '10.12.2018' # DateTime.Parse accepts an IFormatProvider - and CultureInfo implements IFormatProvider! # Let's take French $frenchCulture = [cultureinfo]::GetCultureInfo('fr-FR') # Pass the format provider as the second argument [datetime]::Parse($dateString, $frenchCulture) 方法，并且实际上并不需要它。您可以借助FormHelper（）将这两个“列”放在两个单独的__init__标记内。

<div>

希望，这可以助您一臂之力。有关更多信息，请参考。

Answer 2

这似乎暂时可行（主要受Define crispy forms context names for two forms in one启发，但在这里我基于ModelForm创建了两个新表单）：我希望我自己能更好地理解该解决方案，但至少可以按预期工作。

# models.py
class Product(models.Models):
    car_model_make = models.CharField(default='B', max_length=1, blank=True, choices=CAR_TYPE)
    status_is_secondhand = models.BooleanField(blank=True)
    seller = models.CharField(max_length=50, blank=True, choices=SELLER_TYPE)
    buyer = models.CharField(max_length=50, blank=True, choices=BUYER_TYPE)

# forms.py
class ProductForm(ModelForm):
    class Meta:
        model = Product
        fields = ('__all__')

class CarForm(ProductForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.form_class = 'form-horizontal'
        self.helper.label_class = 'col-sm-4'
        self.helper.field_class = 'col-sm-8'
        self.helper.form_tag = False
        self.helper.add_input(Submit('submit', 'Submit'))

        model = 'car_model_make'
        secondhand = 'status_is_secondhand'

        self.fields[model].label = "Model"
        self.fields[secondhand].label = "Is Secondhand"

        self.helper.layout = Layout(
            Field(model),
            Field(secondhand),
            )

class TransactionForm(ProductForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.form_class = 'form-horizontal'
        self.helper.label_class = 'col-sm-4'
        self.helper.field_class = 'col-sm-8'
        self.helper.form_tag = False


        seller = 'seller'
        buyer = 'buyer'

        self.fields[seller].label = "Seller"
        self.fields[buyer].label = "buyer"

        self.helper.layout = Layout(
            Field(Seller),
            Field(buyer),
            )

# views.py
class ProductFormView(FormView):
    form_class = CarForm
    model = Product

    def get_context_data(self, **kwargs):
        context = super(ProductFormView, self).get_context_data(**kwargs)
        context['form_2'] = TransactionForm(instance=self.model())
        return context

    def form_valid(self, form):
        self.object = form.save()
        return HttpResponseRedirect(self.get_success_url())

    def form_invalid(self, form):
        return self.render_to_response(
            self.get_context_data(
                form=form,
            )
        )

    def get_success_url(self):
        return reverse('index')

# urls.py
urlpatterns = [
    path('', index, name='index'),
    path('product/', ProductFormView.as_view(template_name='product/product.html'),


# html template

{% extends "product/base.html" %}
{% load crispy_forms_tags %}

{% block col8_content %}
<form id="product-modelform" method="post">
    {% csrf_token %}
    {% crispy form %}
    {% endblock col8_content %}
    {% block col4_content %}
    {% crispy form_2 %}
</form>
    {% endblock col4_content %}