Django 1.7 从内联表单中移除添加按钮

18 投票
4 回答
11768 浏览
提问于 2025-04-28 03:05

我在完成一个(可能)相对简单的任务时遇到了问题。
我有一些可以完全修改的模型(Prodotto, Comune),它们在下面的图片中显示为“可添加”的字段。
我其实不想看到这些字段旁边的 +(添加)按钮,因此想要在这个表单中去掉它们的“可添加”属性。
我尝试在这两个模型中设置 has_add_permission=False,但这样会导致完全无法向这些模型添加新对象,而不仅仅是在这个表单中。

我该怎么做呢?

编辑:为了更清楚地说明我的需求,我希望在外键模型的字段旁边没有 "+",但我仍然希望能够添加全新的内联。为了尽可能清楚,我在评论中提到过这样的场景:https://code.djangoproject.com/attachment/ticket/20367/django_custom_user_admin_form.png 我只需要去掉 Groups 和 Country 旁边的 "+"。

现有代码:

models.py(相关应用的代码):

from django.db import models

from smart_selects.db_fields import ChainedForeignKey

from apps.comune.models import Comune, Cap


class Prodotto(models.Model):
    SETTORE_CHOICES = (
        ('CAL', 'Accessori calzature'),
        ('ALI', 'Alimentari'),
        ('ARA', 'Arredamenti e accessori'),
        ('AEM', 'Auto e moto'),
        ('CAL', 'Calzature'),
        ('CEG', 'Cartaria e grafica'),
        ('CEP', 'Concerie e pelletterie'),
        ('EDI', 'Edilizia'),
        ('INV', 'Industrie varie'),
        ('IST', 'Istruzione'),
        ('MDC', 'Materiali da costruzione'),
        ('MMC', 'Metalmeccanica'),
        ('SEI', 'Serramenti e infissi'),
        ('STM', 'Strumenti musicali'),
        ('TEI', 'Terziario innovativo'),
        ('TAB', 'Tessile abbigliamento'),
        ('TCP', 'Trasporto cose e persone'),
        ('VAR', 'Vari'),
    )
    nome = models.CharField(max_length=100)
    settore = models.CharField(max_length=40, choices=SETTORE_CHOICES)

    class Meta:
        verbose_name_plural = "prodotti"
        verbose_name = "prodotto"
        ordering = ['nome']

    def __unicode__(self):
        return self.nome.capitalize()


class Cliente(models.Model):
    TIPOLOGIA_CHOICES = (
        ('AR', 'Artigiano'),
        ('CO', 'Commerciante'),
        ('GI', 'Grande impresa'),
        ('PI', 'Piccola impresa'),
    )
    FORMA_SOCIETARIA_CHOICES = (
        ('SNC', 'S.n.c.'),
        ('SRL', 'S.r.l.'),
        ('SPA', 'S.p.A.'),
        ('SAS', 'S.a.s.'),
        ('COOP', 'Coop.A.r.l.'),
        ('DI', 'D.I.'),
        ('SCARL', 'S.c.a.r.l.'),
        ('SCPA', 'S.c.p.a.'),
    )
    SETTORE_CHOICES = (
        ('CAL', 'Accessori calzature'),
        ('ALI', 'Alimentari'),
        ('ARA', 'Arredamenti e accessori'),
        ('AEM', 'Auto e moto'),
        ('CAL', 'Calzature'),
        ('CEG', 'Cartaria e grafica'),
        ('CEP', 'Concerie e pelletterie'),
        ('EDI', 'Edilizia'),
        ('INV', 'Industrie varie'),
        ('IST', 'Istruzione'),
        ('MDC', 'Materiali da costruzione'),
        ('MMC', 'Metalmeccanica'),
        ('SEI', 'Serramenti e infissi'),
        ('STM', 'Strumenti musicali'),
        ('TEI', 'Terziario innovativo'),
        ('TAB', 'Tessile abbigliamento'),
        ('TCP', 'Trasporto cose e persone'),
        ('VAR', 'Vari'),
    )
    ragione_sociale = models.CharField(max_length=200)
    forma_societaria = models.CharField(
        max_length=5, choices=FORMA_SOCIETARIA_CHOICES)
    titolare = models.CharField(max_length=100, blank=True)
    partita_iva = models.CharField(
        max_length=11, verbose_name='Partita IVA', unique=True)
    tipologia = models.CharField(max_length=2, choices=TIPOLOGIA_CHOICES)
    settore = models.CharField(max_length=40, choices=SETTORE_CHOICES)
    prodotto = models.ManyToManyField(Prodotto, blank=True)

    class Meta:
        verbose_name_plural = "clienti"
        verbose_name = "cliente"

    def __unicode__(self):
        return self.ragione_sociale.capitalize()


class Sede(models.Model):
    nome = models.CharField(max_length=100)
    indirizzo = models.CharField(max_length=200, blank=True)
    cliente = models.ForeignKey(Cliente)
    comune = models.ForeignKey(Comune)
    cap = ChainedForeignKey(
        Cap,
        chained_field="comune",
        chained_model_field="comune",
        show_all=False,
        auto_choose=True,
    )

    class Meta:
        verbose_name_plural = "sedi"
        verbose_name = "sede"
        ordering = ['nome']

    def __unicode__(self):
        return self.nome.capitalize() + ", " + self.indirizzo

admin.py(相关应用的代码):

from django.contrib import admin

from .models import Cliente, Prodotto, Sede
from apps.recapito.models import RecapitoCliente


class SedeInline(admin.TabularInline):
    model = Sede
    extra = 1

    def provincia(self, obj):
        return obj.comune.provincia

    readonly_fields = ['provincia', ]


class RecapitoInline(admin.TabularInline):
    model = RecapitoCliente
    extra = 1
    list_fields = ['cliente', 'tipo', 'recapito', ]


@admin.register(Cliente)
class ClienteAdmin(admin.ModelAdmin):
    list_display = [
        'ragione_sociale', 'forma_societaria', 'titolare', 'partita_iva', ]
    list_filter = ['forma_societaria', ]
    search_fields = ['ragione_sociale', ]
    inlines = [RecapitoInline, SedeInline]


admin.site.register(Prodotto)

这个应用的管理界面生成了这个:

Admin interface

快捷链接 1 和 2 是我需要去掉的,因为它们指向我内联类中的列(外键)。
快捷链接 3 和 4 要保留,因为它们指向的是内联本身。

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4 个回答

6

其实这个问题有一个简单明了的解决办法:

class YourInline(admin.TabularInline):
    extra = 0
    max_num=0
8

经过几天的努力,我终于找到了解决这个问题的方法。

这个简单的小技巧,在处理ModelAdmin子类时(比如我上面代码中的ClienteAdmin),就足够用了。所以这里是一个不添加“Prodotto”字段功能的类版本:

@admin.register(Cliente)
class ClienteAdmin(admin.ModelAdmin):
    list_display = [
        'ragione_sociale', 'forma_societaria', 'titolare', 'partita_iva', ]
    list_filter = ['forma_societaria', ]
    search_fields = ['ragione_sociale', ]
    inlines = [RecapitoInline, SedeInline]
    def get_form(self, request, obj=None, **kwargs):    # Just added this override
        form = super(ClienteAdmin, self).get_form(request, obj, **kwargs)
        form.base_fields['prodotto'].widget.can_add_related = False
        return form

真正麻烦的是处理内联类(TabularInline, StackedInline),因为get_form()这个函数似乎根本没有被调用,所以之前的方法就不管用了。

如果要解释我之前的所有尝试,那会花太多时间,而且我可能对Django还不够熟悉,无法准确说出它们为什么没成功。所以我们直接进入解决方案,其实也并不复杂。

我创建了一个继承自django.contrib.admin.widgets.RelatedFieldWidgetWrapper的小部件,并重写了它的render方法,这样就不会在输出中添加“添加另一个”的链接。这个操作很简单,只需注释掉几行代码。完成后,我用自己的版本替换了原来的RelatedFieldWidgetWrapper(django.contrib.admin.widgets.RelatedFieldWidgetWrapper = NoAddingRelatedFieldWidgetWrapper),就成功了。

显然,为了让它工作,我还需要在admin.py中添加导入语句:

from .widgets import NoAddingRelatedFieldWidgetWrapper

widgets.py

import django.contrib.admin.widgets
from django.utils.safestring import mark_safe


class NoAddingRelatedFieldWidgetWrapper(django.contrib.admin.widgets.RelatedFieldWidgetWrapper):

    def render(self, name, value, *args, **kwargs):
        from django.contrib.admin.views.main import TO_FIELD_VAR
        rel_to = self.rel.to
        info = (rel_to._meta.app_label, rel_to._meta.model_name)
        self.widget.choices = self.choices
        output = [self.widget.render(name, value, *args, **kwargs)]
        '''
        if self.can_add_related:
            related_url = reverse('admin:%s_%s_add' % info, current_app=self.admin_site.name)
            url_params = '?%s=%s' % (TO_FIELD_VAR, self.rel.get_related_field().name)
            # TODO: "add_id_" is hard-coded here. This should instead use the
            # correct API to determine the ID dynamically.
            output.append('<a href="%s%s" class="add-another" id="add_id_%s" onclick="return showAddAnotherPopup(this);"> '
                          % (related_url, url_params, name))
            output.append('<img src="%s" width="10" height="10" alt="%s"/></a>'
                          % (static('admin/img/icon_addlink.gif'), _('Add Another')))
        '''
        return mark_safe(''.join(output))

# Monkeypatch
django.contrib.admin.widgets.RelatedFieldWidgetWrapper = NoAddingRelatedFieldWidgetWrapper

为了完整起见,这里是最终版本的admin.py:

admin.py

from django.contrib import admin
import django.contrib.admin.widgets

from django.db import models

from .models import Cliente, Prodotto, Sede
from apps.recapito.models import RecapitoCliente
from .widgets import NoAddingRelatedFieldWidgetWrapper


class SedeInline(admin.TabularInline):
    model = Sede
    extra = 1

    def provincia(self, obj):
        return obj.comune.provincia

    readonly_fields = ['provincia', ]


class RecapitoInline(admin.TabularInline):
    model = RecapitoCliente
    extra = 1
    readonly_fields = ['cliente', 'tipo', 'recapito', ]


@admin.register(Cliente)
class ClienteAdmin(admin.ModelAdmin):
    list_display = [
        'ragione_sociale', 'forma_societaria', 'titolare', 'partita_iva', ]
    list_filter = ['forma_societaria', ]
    search_fields = ['ragione_sociale', ]
    inlines = [RecapitoInline, SedeInline]
    def get_form(self, request, obj=None, **kwargs):
        form = super(ClienteAdmin, self).get_form(request, obj, **kwargs)
        form.base_fields['prodotto'].widget.can_add_related = False
        return form

如果有人能提出更好的解决方案,我会很乐意接受。

25

要去掉“添加另一个”这个选项,请在管理界面的内联类中添加下面的方法。

def has_add_permission(self, request):
    return False

同样,如果你想禁用“删除?”这个选项,也可以在管理界面的内联类中添加以下方法。

def has_delete_permission(self, request, obj=None):
    return False
22

我觉得这个方法比你最后用的那个更简单直接。反正对我来说是有效的。

基本上,这个方法是在内联类中覆盖get_formset,就像你提到的覆盖ModelAdmin的get_form方法一样。我们从表单集合中获取表单,然后做完全相同的事情。至少在我使用的1.9版本中,这个方法运行得很好。

class VersionEntryInline(admin.TabularInline):
    template = 'admin/edit_inline/tabular_versionentry.html'
    model = VersionEntry
    extra = 0

    def get_formset(self, request, obj=None, **kwargs):
        """
        Override the formset function in order to remove the add and change buttons beside the foreign key pull-down
        menus in the inline.
        """
        formset = super(VersionEntryInline, self).get_formset(request, obj, **kwargs)
        form = formset.form
        widget = form.base_fields['project'].widget
        widget.can_add_related = False
        widget.can_change_related = False
        widget = form.base_fields['version'].widget
        widget.can_add_related = False
        widget.can_change_related = False
        return formset

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