条件 Flask-WTF 表单字段

Question

我想根据他们选择的类别包括或排除表单域。

我想做的一种方法是这样的。

if form.category.data == "retail":
    # return "Retail Form"
    form = RetailListingForm()
    return render_template('seller/seller_new_listing.html', form=form)
if form.category.data == "wholesale":
    # Return Wholesale
    form = WholeSaleListingForm()
    return render_template('seller/seller_new_listing.html', form=form)

if form.category.data == "wholesale-and-retail":
    # Return Both forms by inheritance
    return render_template('seller/seller_new_listing.html', form=form)

在html.

{% if form == WholeSaleListingForm  %}
    {{render_field(form.whole_sale_price)}}
{% endif  %}

这是行不通的，因为如果它不是完整的销售表格，就会出现 whole_sale_price 错误和 RetailListingForm 您会如何推荐我在将所有表格都包含在一个模板中的同时包含表格。

Answer 1

您可以添加另一个变量来处理您的表单选择类型，然后将其传递给 render_template 函数：

if form.category.data == "retail":
    # return "Retail Form"
    type = 'retail'
    form = RetailListingForm()
    return render_template('seller/seller_new_listing.html', form=form, type=type)
elif form.category.data == "wholesale":
    # Return Wholesale
    type = 'wholesale'
    form = WholeSaleListingForm()
    return render_template('seller/seller_new_listing.html', form=form, type=type)
elif form.category.data == "wholesale-and-retail":
    # Return Both forms by inheritance
    return render_template('seller/seller_new_listing.html', form=form, type=None)

然后，在您的模板中，只需使用 evaluate with type:

{% if type == 'wholesale' %}
    {{ render_field(form.whole_sale_price) }}
{% endif %}

条件 Flask-WTF 表单字段

Conditional Flask-WTF Forms Fields

python

flask

flask-wtforms