在最新版本的Django自动完成灯中,modelform_factory的替代品是什么?

时间:2016-07-18 13:17:57

标签: jquery django modelform django-autocomplete-light

在自动完成灯的早期版本中,有一种非常快速的方式来添加新表单。

form = modelform_factory(ModelName, fields='__all__')

如果模型已注册自动完成视图,则会根据给定的模型自动构建新表单。非常快速和容易。在版本3.1.6,即今天发布的最新版本中,此功能似乎已被删除。我不得不返回并重新修改所有内容以使我们升级,并且我想知道是否有新版本中我可能错过的旧版modelform_factory。或者是否有一种快速设置可以轻松重复使用的通用自动完成视图/表单的方法?任何想法都表示赞赏。

1 个答案:

答案 0 :(得分:1)

因此经过大量的狩猎后,我无法找到类似于之前自动完成灯的modelform_factory的内容,所以我决定自己制作。以下是我们在生产CMS中直接采用的示例。

from dal import autocomplete

from mymodels import ThisModel, ThatModel, AnotherModel

def autocomplete_form_factory(ac_model, *args, **kwargs):
    field_url_dict = {}
    m2m = ('mypeeps', 'yourpeeps',)
    if ac_model in (ThisModel, ThatModel):
        # Connects the "stuff_field" of these
        # models to the url named "stuff-autocomplete"
        field_url_dict = {
            'stuff_field': 'stuff'
        }
    elif ac_model == AnotherModel:
        # Connects AnotherModel's ForeignKey field "headhoncho"
        # and its ManyToManyFields "mypeeps" and "yourpeeps"
        # to the "peeps-autocomplete" url
        field_url_dict = {
            'headhoncho': 'peeps',
            'mypeeps': 'peeps',
            'yourpeeps': 'peeps',
        }

    # Assign the appropriate widgets based on this model's autocomplete dictionary
    ac_widgets = {}
    ac_fields = kwargs.get('fields', ('__all__'))
    for field, url in field_url_dict.iteritems():
        is_m2m = field in m2m
        text = 'Type to return a list of %s...' if is_m2m else 'Type to return a %s list...'
        kwargs = {
            'url': '%s-autocomplete' % url,
            'attrs': {
                'data-placeholder': text % ac_model._meta.get_field(field).verbose_name,
                'data-minimum-input-length': 3,
            }
        }
        ac_widgets[field] = autocomplete.ModelSelect2Multiple(**kwargs) if is_m2m else autocomplete.ModelSelect2(**kwargs)

    # Create the form
    class DynamicAutocompleteForm(forms.ModelForm):
        class Meta:
            model = ac_model
            fields = ac_fields
            widgets = ac_widgets

    return DynamicAutocompleteForm

对于相应的视图,您可以执行以下操作:

class BaseAutocomplete(autocomplete.Select2QuerySetView):
    model = None
    fields = ['title']
    filters = {}

    def get_queryset(self):
        if not self.request.user.is_authenticated() or not self.q or len(self.q) < 3:
            return self.model.objects.none()

        # OR all of our field searches together
        obj = Q()
        for field in self.fields:
            kwargs = {}
            kwargs['%s__icontains' % field] = self.q
            obj = obj | Q(**kwargs)

        return self.model.objects.filter(obj).filter(**self.filters)

class StuffAutocomplete(BaseAutocomplete):
    model = Stuff
    filters = {'is_awesome': True}

class PeepsAutocomplete(BaseAutocomplete):
    model = Peeps
    fields = ['name', 'notes']

对于网址,您可以使用以下内容:

url(r'^stuff-autocomplete/$', StuffAutocomplete.as_view(), name='stuff-autocomplete'),
url(r'^peeps-autocomplete/$', PeepsAutocomplete.as_view(), name='peeps-autocomplete',),

要在代码中使用表单工厂,您可以使用以下内容,将结果分配给模型管理员表单或将其用作更复杂表单的基础:

autocomplete_form_factory(ThisModel)
autocomplete_form_factory(AnotherModel, fields=["headhoncho", "mypeeps"])

这模仿了我们对autocomplete早期的modelform_factory所具有的功能,使得创建自动完成表单变得非常简单,并在设置好所有内容后根据需要将它们添加到管理员。希望这有助于节省一些时间。