ManyToManyField を通じて関連付けられたオブジェクトの順序を定義する方法はありますか?
例：
ArticleContainer1 には、 article1、article2、article3、article6の順序で含まれています。
ArticleContainer2 には、 article3、article2、article1、article4の順序で含まれています。ArticleContainer3 には次の順序で
article5が含まれます。
私のクラスは次のとおりです:
class Article(models.Model):
title = models.CharField(max_length=200)
class ArticleContainer(models.Model):
contents = models.ManyToManyField(Article, blank=True, null=True)
ベストアンサー1
これは私が持っている例です。部門ごとに順序付けして人々を部門に編成するサイトです。これはあなたの問題と同じ概念ですが、モデルが異なります。この例では、テーブルを介して多対多を使用します。
class Department(models.Model):
slug = models.SlugField(
verbose_name = _(u'Slug'),
help_text = _(u'Uri identifier for this department.'),
max_length=255
)
name = models.CharField(
verbose_name = _(u'Department Name'),
help_text = _(u'The department\'s name.'),
max_length = 255
)
description = models.TextField(
verbose_name = _(u'Description'),
help_text = _(u'Department\'s description')
)
people = models.ManyToManyField(
Person,
through = 'DepartmentPeople',
related_name = 'people',
verbose_name = _(u'People'),
help_text = _(u'People in this Department')
)
order_by = models.IntegerField(
verbose_name = _(u'Ordering Weight'),
help_text = _(u'This item\'s weight within a list.'),
max_length = 255
)
class Meta:
verbose_name = _(u"Department")
verbose_name_plural = _(u"Departments")
ordering = ['order_by',]
def people_list(self):
return [dp.person for dp in DepartmentPeople.objects.filter(department=self).order_by('order')]
def __unicode__(self):
return self.name
そしてスルーモデル:
class DepartmentPeople(models.Model):
person = models.ForeignKey(
Person,
verbose_name = _(u'Person'),
help_text = _(u'Person is a member of this deparment.'),
)
department = models.ForeignKey(
Department,
verbose_name = _(u'Department'),
help_text = _(u'Pseron is a member of this department.'),
)
order = models.IntegerField(
verbose_name = _(u'Order'),
help_text = _(u'What order to display this person within the department.'),
max_length = 255
)
class Meta:
verbose_name = _(u"Department Person")
verbose_name_plural = _(u"Department People")
ordering = ['order',]
def __unicode__(self):
return self.person.first_name + " " + self.person.last_name + " is a member of " + self.department.name + (" in position %d" % self.order)
そして管理者:
class DepartmentPeopleInline(admin.TabularInline):
model = DepartmentPeople
extra = 1
class DepartmentAdmin(admin.ModelAdmin):
inlines = (DepartmentPeopleInline,)
admin.site.register(Person, PersonAdmin)
admin.site.register(Department, DepartmentAdmin)
コメントでのリクエスト:
注: 以下は私のPersonAdminですが、この例では不必要に複雑です。単純なもので十分でしょう。
class PersonAdmin(admin.ModelAdmin) :
pass
しかし、私のアプリではこれを使用しています:
class PersonForm(forms.ModelForm):
abstract = forms.CharField(
widget=TinyMCE(attrs={'cols': 80, 'rows': 30})
)
class Meta:
model = Person
class PersonAdmin(reversion.VersionAdmin):
form = PersonForm
# The Form Fieldsets
fieldsets = [
(
None,
{
'fields' : [('first_name', 'last_name', 'post_nominal', ), 'slug', 'title', 'headshot', 'large_photo', ('email', 'phone', ), 'abstract']
},
)
]
# Prepopulated fields
prepopulated_fields = {'slug': ('first_name', 'last_name', 'post_nominal', )}
# Fields that are readonly
#readonly_fields = ('slug', )
def formfield_for_dbfield(self, db_field, **kwargs):
if db_field.name == 'headshot':
request = kwargs.pop("request", None)
kwargs['widget'] = AdminImageWidget
return db_field.formfield(**kwargs)
return super(PersonAdmin, self).formfield_for_dbfield(db_field, **kwargs)