我有一个django Formset,我想在另一种形式的中间布局。我正在使用django-crispy-forms在父表单__init__
中设置布局:
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'))
我的模板只是使用{% crispy %}
标记呈现表单。
我想知道如何合并formset。我应该在上面的init函数中实例化它吗?我怎么在那里引用它?
网上有other examples形式和formset组合,其中一个连续渲染一个渲染,但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。
答案 0 :(得分:18)
我在不修改Crispy Forms的情况下解决了这个问题,创建了一个呈现formset的新字段类型:
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}))
它需要一个模板来渲染formset,它可以让你控制它的呈现方式:
{% load crispy_forms_tags %}
<div class="formset">
{% crispy formset %}
<input type="button" name="add" value="Add another" />
</div>
您可以使用它在布局中嵌入formset,就像任何其他Crispy布局元素一样:
self.helper.layout = Layout(
MultiField(
"Education",
Formset('education'),
),
答案 1 :(得分:4)
目前酥脆形式不支持此功能。您唯一的选择是使用|as_crispy_field
过滤器(尚未记录,抱歉)。
我已开始为{% crispy %}
标记开发此功能,并在功能分支中对此进行了解释:https://github.com/maraujop/django-crispy-forms/issues/144
我正在寻求反馈,所以如果您仍然感兴趣,请随时发帖。
答案 2 :(得分:4)
qris稍微修改了之前的答案。
此更新(由Alejandro建议)将允许我们的自定义 Formset 布局对象使用FormHelper对象来控制formset的字段被渲染。
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())
模板(用于渲染formset):
{% load crispy_forms_tags %}
<div class="formset">
{% if helper %}
{% crispy formset helper %}
{% else %}
{{ formset|crispy }}
{% endif %}
</div>
现在它可以像任何其他脆弱的表单布局对象一样在任何布局中使用。
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'),
),
)
答案 3 :(得分:0)
基于上面的解决方案Formset(LayoutObject),你可以结合使用django-dynamic-formset&amp;香脆。 在我的订单页面上,我有:
现在它简单明了,ModelForms是:
0: 1 ***
1: 2 ******
2: 3 ********
3: 3 ********
4: 5 **************
5: 1 ***
6: 2 ******
7: 1 ***
8: 1 ***
Formset助手布局:
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"))
添加/删除内联,使用formset操作保存顺序按预期工作。