django脆形窗体:在窗体中嵌套窗体

I have a django Formset that I'd like to layout in the middle of another form. I'm using django-crispy-forms to set the layout in the parent form's __init__:

我有一个django Formset，我想在另一个窗体中间进行布局。我正在使用django-crispy窗体来设置父窗体的__init__:

from crispy_forms.helper import FormHelper
from crispy_forms.layout import Submit, Layout, Field, Div
def __init__(self, *args, **kwargs):
    self.helper = FormHelper()
    self.helper.layout = Layout(
        Div(
            Div(Field('foo'), css_class='span3'),
            Div(Field('bar'), css_class='span4'),
            css_class='row'
            ),
        Field('baz', css_class='span1'),
            ...
            )
    self.helper.add_input(Submit('submit', 'Submit', css_class='btn btn-primary offset4'))

My template simply renders the form using the {% crispy %} tag.

我的模板只是使用{% crispy %}标签呈现表单。

I'd like to know how I should incorporate the formset. Should I instantiate it in the above init function? How do I refer to it there?

我想知道我该如何合并这张表格。我应该在上面的init函数中实例化它吗?我怎么说呢?

There are other examples of form and formset combos online that have one render after the other serially, but I'm wondering whether I can have more control over how they fit together with crispy's layout.

还有其他的表单和formset combos在线的例子，它们有一个接一个的呈现，但是我想知道我是否可以更好地控制它们如何与crispy的布局结合在一起。

4 个解决方案

#1

I solved this without modifying Crispy Forms, by creating a new field type that renders a formset:

我没有修改Crispy表单就解决了这个问题，创建了一个新的字段类型，它呈现了一个formset:

from crispy_forms.layout import LayoutObject, TEMPLATE_PACK

class Formset(LayoutObject):
    """
    Layout object. It renders an entire formset, as though it were a Field.

    Example::

    Formset("attached_files_formset")
    """

    template = "%s/formset.html" % TEMPLATE_PACK

    def __init__(self, formset_name_in_context, template=None):
        self.formset_name_in_context = formset_name_in_context

        # crispy_forms/layout.py:302 requires us to have a fields property
        self.fields = []

        # Overrides class variable with an instance level variable
        if template:
            self.template = template

    def render(self, form, form_style, context, template_pack=TEMPLATE_PACK):
        formset = context[self.formset_name_in_context]
        return render_to_string(self.template, Context({'wrapper': self,
            'formset': formset}))

It needs a template to render the formset, which gives you control over exactly how it's rendered:

它需要一个模板来呈现格式集，它可以让你精确地控制它是如何呈现的:

{% load crispy_forms_tags %}

<div class="formset">
    {% crispy formset %}
    <input type="button" name="add" value="Add another" />
</div>

You can use it to embed a formset in your layouts just like any other Crispy layout element:

您可以使用它在布局中嵌入一个formset，就像其他的Crispy布局元素一样:

self.helper.layout = Layout(
    MultiField(
        "Education",
        Formset('education'),
    ),

#2

This is currently not supported in crispy-forms. Your only option would be to use |as_crispy_field filter (not documented yet, sorry).

这是目前不支持的保鲜格式。您唯一的选择是使用|as_crispy_field过滤器(还没有文档说明，抱歉)。

I have started development of this feature for {% crispy %} tag and in a feature branch, it's all explained here: https://github.com/maraujop/django-crispy-forms/issues/144

我已经开始为{% crispy %}标签开发这个特性，并且在一个特性分支中，这里解释了它:https://github.com/maraujop/django-crispy-forms/issues/144

I'm looking for feedback, so if you are still interested, feel free to post.

我正在寻找反馈，所以如果你仍然感兴趣的话，可以发表意见。

#3

A slight modification to the earlier answer by qris.

qris对之前的答案做了一点修改。

This update (as suggested by Alejandro) will allow for our custom Formset Layout Object to use a FormHelper object to control how the formset's fields are rendered.

这个更新(正如Alejandro建议的)将允许我们的自定义Formset布局对象使用FormHelper对象来控制Formset字段的呈现方式。

from crispy_forms.layout import LayoutObject

from django.template.loader import render_to_string


class Formset(LayoutObject):
    """ 
    Renders an entire formset, as though it were a Field.
    Accepts the names (as a string) of formset and helper as they
    are defined in the context

    Examples:
        Formset('contact_formset')
        Formset('contact_formset', 'contact_formset_helper')
    """

    template = "forms/formset.html"

    def __init__(self, formset_context_name, helper_context_name=None,
                 template=None, label=None):

        self.formset_context_name = formset_context_name
        self.helper_context_name = helper_context_name

        # crispy_forms/layout.py:302 requires us to have a fields property
        self.fields = []

        # Overrides class variable with an instance level variable
        if template:
            self.template = template

    def render(self, form, form_style, context, **kwargs):
        formset = context.get(self.formset_context_name)
        helper = context.get(self.helper_context_name)
        # closes form prematurely if this isn't explicitly stated
        if helper:
            helper.form_tag = False

        context.update({'formset': formset, 'helper': helper})
        return render_to_string(self.template, context.flatten())

Template (used to render formset):

模板(用于呈现formset):

{% load crispy_forms_tags %}

<div class="formset">
  {% if helper %}
    {% crispy formset helper %}
  {% else %}
    {{ formset|crispy }}
  {% endif %}
</div>

Now it can be used in any layout just like any other crispy forms layout object.

现在，它可以在任何布局中使用，就像任何其他酥脆的表单布局对象一样。

self.helper.layout = Layout(
    Div(
        Field('my_field'),
        Formset('my_formset'),
        Button('Add New', 'add-extra-formset-fields'),
    ),
)

# or with a helper
self.helper.layout = Layout(
    Div(
        Field('my_field'),
        Formset('my_formset', 'my_formset_helper'),
        Button('Add New', 'add-extra-formset-fields'),
    ),
)

#4

Basing on above solution Formset(LayoutObject), you would combine django-dynamic-formset & crispy. On my order page I have:

基于以上的解决方案格式集(LayoutObject)，您可以将django动态格式集和脆饼组合在一起。在我的订单页面上，我有:

• order's section part 1
• 第1部分订单的部分
• order's inline formset with dynamic-add forms
• order的内联形式与动态添加表单。
• order's section part N
• 订单的部分一部分N

Now it is simple and clear, ModelForms are:

现在它简单明了，模型形式如下:

class OrderTestForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
    super(OrderTestForm, self).__init__(*args, **kwargs)
    self.helper = FormHelper(self)
    self.helper.form_tag = True
    self.helper.html5_required = True
    self.helper.form_action = 'test_main'
    self.helper.layout = Layout(
        'product_norms', #section 1
        'reference_other', #section 1
        # rest of the section 1 fields
        Formset('samples', 'helper'), # inline dynamic forms
        'checkbox_is_required' # start of section N
        # other order sections fields
    )
    self.helper.add_input(Submit("submit", "Save order"))

Formset helper layout:

形态层组辅助布局:

class SamplesFormSetHelper(FormHelper):
def __init__(self, *args, **kwargs):
    super(SamplesFormSetHelper, self).__init__(*args, **kwargs)
    self.form_method = 'post'
    self.html5_required = True
    self.layout = Layout(
        Fieldset('',
        'description',
        'product', # foreign key
        'DELETE', # delete django-dynamic-formset
        css_class="formset_row"), # add-rows 
    )
    self.form_tag = False
    self.render_required_fields = False

Add/delete inlines, saving order with formset operations work as expected.

添加/删除inlines，并按照预期的方式使用formset操作保存订单。