Django admin.py过滤器中的HTML输入文本框

Question

我想在Django (admin.py)中使用中的文本写来过滤数据。我需要按所在城市对公司进行筛选，所有城市的名单都太长了。我想用一个文本输入替换所有城市的过滤列表。我在这里发现了一些类似的东西，http://djangosnippets.org/snippets/2429/，但是有两个问题：

1. 作者没有发布models.py，所以很难根据我的需要修改代码(+没有注释)
2. 有已使用的类UserFieldFilterSpec( RelatedFilterSpec )：但是我需要使用AllValuesFilterSpec而不是RelatedFilterSpec(更多在RelatedFilterSpec文件中)，因为城镇列表与comapny属于同一类(按城镇类别列出，它们应该是按外键引用公司(ManyToMany关系)，但出于某些原因，必须这样做)

models.py的重要部分如下所示

class Company(models.Model):
    title = models.CharField(max_length=150,blank=False)
    city = models.CharField(max_length=50,blank=True)

来自admin.py的东西

class CatalogAdmin(admin.ModelAdmin):
    form = CatalogForm
    list_display = ('title','city') 
    list_filter = ['city',]

因此，我再次需要: 1.不再在Django filter 2中显示一个城市列表输入的文本。在输入文本输入的城市名称后，按城市过滤数据(可以通过提交按钮或通过javascript发送过滤请求)

感谢你所有的帖子。

Answer 1

以防还有人需要这个。它在模板上有点麻烦，但在没有js的情况下实现。

filters.py

from django.contrib.admin import ListFilter
from django.core.exceptions import ImproperlyConfigured


class SingleTextInputFilter(ListFilter):
    """
    renders filter form with text input and submit button
    """
    parameter_name = None
    template = "admin/textinput_filter.html"

    def __init__(self, request, params, model, model_admin):
        super(SingleTextInputFilter, self).__init__(
            request, params, model, model_admin)
        if self.parameter_name is None:
            raise ImproperlyConfigured(
                "The list filter '%s' does not specify "
                "a 'parameter_name'." % self.__class__.__name__)

        if self.parameter_name in params:
            value = params.pop(self.parameter_name)
            self.used_parameters[self.parameter_name] = value

    def value(self):
        """
        Returns the value (in string format) provided in the request's
        query string for this filter, if any. If the value wasn't provided then
        returns None.
        """
        return self.used_parameters.get(self.parameter_name, None)

    def has_output(self):
        return True

    def expected_parameters(self):
        """
        Returns the list of parameter names that are expected from the
        request's query string and that will be used by this filter.
        """
        return [self.parameter_name]

    def choices(self, cl):
        all_choice = {
            'selected': self.value() is None,
            'query_string': cl.get_query_string({}, [self.parameter_name]),
            'display': _('All'),
        }
        return ({
            'get_query': cl.params,
            'current_value': self.value(),
            'all_choice': all_choice,
            'parameter_name': self.parameter_name
        }, )

templates/admin/textinput_filter.html

{% load i18n %}
<h3>{% blocktrans with filter_title=title %} By {{ filter_title }} {% endblocktrans %}</h3>

{#i for item, to be short in names#}
{% with choices.0 as i %}
<ul>
    <li>
        <form method="get">
            <input type="search" name="{{ i.parameter_name }}" value="{{ i.current_value|default_if_none:"" }}"/>

            {#create hidden inputs to preserve values from other filters and search field#}
            {% for k, v in i.get_query.items %}
                {% if not k == i.parameter_name %}
                    <input type="hidden" name="{{ k }}" value="{{ v }}">
                {% endif %}
            {% endfor %}
            <input type="submit" value="{% trans 'apply' %}">
        </form>
    </li>

    {#show "All" link to reset current filter#}
    <li{% if i.all_choice.selected %} class="selected"{% endif %}>
        <a href="{{ i.all_choice.query_string|iriencode }}">
            {{ i.all_choice.display }}
        </a>
    </li>
</ul>
{% endwith %}

然后根据您在admin.py中的模型

class CatalogCityFilter(SingleTextInputFilter):
    title = 'City'
    parameter_name = 'city'

    def queryset(self, request, queryset):
        if self.value():
            return queryset.filter(city__iexact=self.value())

class CatalogAdmin(admin.ModelAdmin):
    form = CatalogForm
    list_display = ('title','city') 
    list_filter = [CatalogCityFilter,]

准备使用过滤器的样子是这样的。

​

Answer 2

我正在运行Django 1.10、1.11和黑色的解决方案不完全合适，因为Django抱怨过滤器字段必须从'FieldListFilter‘继承。

因此，对过滤器从FieldListFilter继承的简单更改处理了Django的抱怨，而不必同时为每个字段指定一个新的类。

class SingleTextInputFilter(admin.FieldListFilter):
    """
    renders filter form with text input and submit button
    """

    parameter_name = None
    template = "admin/textinput_filter.html"

    def __init__(self, field, request, params, model, model_admin, field_path):
        super().__init__(field, request, params, model, model_admin, field_path)
        if self.parameter_name is None:
            self.parameter_name = self.field.name

        if self.parameter_name in params:
            value = params.pop(self.parameter_name)
            self.used_parameters[self.parameter_name] = value

    def queryset(self, request, queryset):
        if self.value():
            return queryset.filter(imei__icontains=self.value())

    def value(self):
        """
        Returns the value (in string format) provided in the request's
        query string for this filter, if any. If the value wasn't provided then
        returns None.
        """
        return self.used_parameters.get(self.parameter_name, None)

    def has_output(self):
        return True

    def expected_parameters(self):
        """
        Returns the list of parameter names that are expected from the
        request's query string and that will be used by this filter.
        """
        return [self.parameter_name]

    def choices(self, cl):
        all_choice = {
            'selected': self.value() is None,
            'query_string': cl.get_query_string({}, [self.parameter_name]),
            'display': _('All'),
        }
        return ({
            'get_query': cl.params,
            'current_value': self.value(),
            'all_choice': all_choice,
            'parameter_name': self.parameter_name
        }, )

模板/admin/textinput_filter.html(未更改)：

{% load i18n %}
<h3>{% blocktrans with filter_title=title %} By {{ filter_title }} {% endblocktrans %}</h3>

{#i for item, to be short in names#}
{% with choices.0 as i %}
<ul>
    <li>
        <form method="get">
            <input type="search" name="{{ i.parameter_name }}" value="{{ i.current_value|default_if_none:"" }}"/>

            {#create hidden inputs to preserve values from other filters and search field#}
            {% for k, v in i.get_query.items %}
                {% if not k == i.parameter_name %}
                    <input type="hidden" name="{{ k }}" value="{{ v }}">
                {% endif %}
            {% endfor %}
            <input type="submit" value="{% trans 'apply' %}">
        </form>
    </li>

    {#show "All" link to reset current filter#}
    <li{% if i.all_choice.selected %} class="selected"{% endif %}>
        <a href="{{ i.all_choice.query_string|iriencode }}">
            {{ i.all_choice.display }}
        </a>
    </li>
</ul>
{% endwith %}

用法：

class MyAdmin(admin.ModelAdmin):
    list_display = [your fields]
    list_filter = [('field 1', SingleTextInputFilter), ('field 2', SingleTextInputFilter), further fields]

Answer 3

虽然这实际上不是您的问题，但对于Django-选择来说，这似乎是一个完美的解决方案，只需几行就可以添加一个AJAX驱动的CharField表单，从城市列表中选择它的条目。查看上面链接中列出的示例。