Djangoadminsite(二)ModelAdmin方法

ModelAdmin methods

save_model(request, obj, form, change)

此方法為admin介面使用者保存model實例時的行為。 request為HttPRequest實例，obj為model實例，form為ModelForm實例，change為bool值，取決於model實例是新增的還是修改的。

重寫此方法可以做一些pre-save或post-save行為。

例如，可以把request.user儲存為model實例的屬性：

from django.contrib import admin

class ArticleAdmin(admin.ModelAdmin):
sel  def save_obdel(admin.ModelAdmin):
sel , def save_obdel(ob​​ofee, self,ob obj.user = request.user
       obj.save()

delete_model(request, obj)

admin介面使用者刪除model實例時的方法。

save_formset(request, form, formset, change)

admin介面使用者保存formset的方法，可以改寫：

class ArticleAdmin(admin.ModelAdmin):
   def save_formset(
       instances = formset.save(commit=False)
       for instance in instances:
         instance in instances:
     
       formset.save_m2m()

get_ordering(request)

排序。

class PersonAdmin(admin.ModelAdmin):

   def get_ordering(self, request):
       if request.user      else:
           return ['name']


get_search_results(request, queryset, search_term)

 可以自訂查詢結果。

save_related(request, form, formsets, change)

formsets是model的inline formsets的列表。 model的相關物件保存時的行為。

   def save_related(self, request, form, formsets, change):

       """

       Given the ``HttpRequest` Mode) of inline formsets and a boolean value based on whether the
       parent is being added or changed, save the related objects to the
       database。
       """
       form.save_m2m()
       for formset in formsets:
           self.save_formset(request, form, formset, change=change)


get_readonly_fields(request, obj=None)

get_readonly_fields(request, obj=None)

只會讀出欄位。

get_prepopulated_fields(request, obj=None)

傳回預置欄位。

get_list_display(request)

回傳list_display。

get_list_display_links(request, list_display)

回傳list_display_link。

get_fields(request, obj=None)

返回fields。

get_fieldsets(request, obj=None)
回傳fieldsets。

get_list_filter(request)
回傳list_filter。

get_search_fields(request)
回傳search_fields。

get_inline_instances(request, obj=None)
回傳InlineModelAdmin物件的清單或元群組

class MyModelAdmin(admin.ModelAdmin):
  sel inline(self.model , self.admin_site) for inline in self.inlines]

get_urls()
傳回ModelAdmin的可用urls。

class MyModelAdmin(admin.ModelAdmin):

   def get_urls(self):
       urls = super(MyModelAdmin, self).get_urls(url]       (r'^my_view/$', self. my_view)

       )

       return my_urls + urls

   def my_view(self, request):
Š         pass


上面my_view方法的路徑就是 /admin/myapp/mymodel/my_view/ 。

不過上面的例子中無驗證和緩存，要提供驗證和緩存：

class MyModelAdmin(admin.ModelAdmin):
   def get_urls(self):
       urls = super(MyModelAdmin, MyModelAd     (r'^my_view/$', self.admin_site .admin_view(self.my_view))
       )
       return my_urls + urls


如果頁面可緩存而還是要進行權限驗證：

(r'^my_view/$', self.admin_site.admin_view(self.my_view, cacheable=True))

get_form(request, obj=None, **kwargs)

回傳add和change view所使用的ModelForm。下面使用者非superuser時會隱藏一些欄位。

class MyModelAdmin(admin.ModelAdmin):

   def get_form(self, request, obj=None, **kwargs):

              self.exclude.append( 'field_to_hide')
       return super(MyModelAdmin, self).get_form(request, obj, **kwargs)


get_formsets(request, objline)

get_formsets(request, objline=N;

如果只想在the change view中展示一個特殊的inline：

class MyModelAdmin(admin.ModelAdmin):

   inlines = [MyInline, SomeOtherInline]

  sel self .get_inline_instances(request, obj):

           # hide MyInline in the add view

           if isinstance(inline, Myinsta) and        if isinstance(inline, Myinsta continue
           yield inline.get_formset(request, obj)


get_formsets_with_inlines(request, obj= None)

Yields (FormSet, InlineModelAdmin) pairs for use in admin add and change views.

如果只想在the change view中展示一個特殊的inline：
MyInline, SomeOtherInline]

   def get_formsets_with_inlines(self, request, obj=None):

       for inline in the add view

           if isinstance(inline, MyInline) and obj is None:

               continue

           yield inline.get_formset(request, )、 formfield. 根據不同的使用者傳回不同的子集：

class MyModelAdmin(admin.ModelAdmin):
   def formfield_for_foreignkey(self, db_field, request, **kwargs):
       if db_field.name == "car":🠎, db filter(owner=request .user)
       return super(MyModelAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)


formfield_for_manytomany(db_db_fore)


formfield_for_manytomany(db_db_fore)

formfield_for_manytomany(db_db_foreman, rekeyd, cignman. ：

class MyModelAdmin(admin.ModelAdmin):
   def formfield_for_manytomany(self, db_field, request, **kwargs):
        db ryset"] = Car.objects.filter (owner=request.user)
       return super(MyModelAdmin, self).formfield_for_manytomany(db_field, request, **kwargs)

ModelAdmin。 ytomany,這個方法用於choices：

class MyModelAdmin(admin.ModelAdmin):

   def formfield_for_choice_field(self, db_field, request, **kwargs):

gs['choices'] = (

('accepted', 'Accepted'),
               ('denied', 'Denied'),
         .           kwargs['choices'] += (('ready', 'Ready for deployment '),)
       return super(MyModelAdmin, self).formfield_for_choice_field(db_field, request, **kwargs)

ModelAdmin.get_changelist(request, **kwargs)
返回changelist頁面使用的Changelis類別. 預設 django.contrib.admin.views.main.ChangeList。

ModelAdmin.get_changelist_form(request, **kwargs)
回傳changelist頁面所使用的ModelForm類別。

from django import forms

class MyForm(forms.ModelForm):
   pass

class MyModelAdmin(admin.ModelAdmin):
  list turn MyForm

ModelAdmin.get_changelist_formset (request, **kwargs)

回傳changelist頁面所使用的ModelFormSet類別。

from django.forms.models import BaseModelFormSet

class MyAdminFormSet(BaseModelFormSet):
   pass

class MyModelAdmin(admin.ModelAdminat)quest,defobdreded       kwargs['formset'] = MyAdminFormSet
       return super(MyModelAdmin, self).get_changelist_formset(request, **kwargs)


ModelAdmin.has_add_permission(request)

ModelAdmin.has_add_permission(request)
是否具有權限。

ModelAdmin.has_change_permission(request, obj=None)
是否具有change權限。

ModelAdmin.has_delete_permission(request, obj=None)
是否具有delete權限。

ModelAdmin.get_queryset(request)
傳回admin介面可編輯的model QuerySet集。 根據不同的user回傳不同的結果：

class MyModelAdmin(admin.ModelAdmin):
   def get_queryset(self, request):
       _superuser:
           return qs
       return qs.filter(author=request.user)

ModelAdmin.message_user(request, messaage,

ModelAdmin.message_user(request, messay)_lehquest, m 但是

向使用django.contrib.messages backend的用戶發送訊息。

ModelAdmin.get_paginator(queryset, per_page, orphans=0, allow_empty_first_page=True)

傳回一個分頁實例。 Returns an instance of the paginator to use for this view. By default, instantiates an instance of paginator.

ModelAdmin.response_add(request, obj, post_url_continue=None)

)🟎

ModelAdmin.response_change(request, obj)

決定change_view()的HttpResponse，model被修改後執行。

ModelAdmin.response_delete(request, obj_display)

決定delete_view()的HttpResponse，model被刪除後執行。

obj_display是被刪除物件的name。

ModelAdmin.get_changeform_initial_data(request)

A hook for the initial data on admin change forms. By default, fields are given initial values from GET parameters. For default, fields aregiven initial values from GET parameters. For defaults in iti0ue values from GETd itivalue.

This method should return a dictionary in the form {'fieldname': 'fieldval'}:

def get_changeform_initial_data(self, request):
 ＜ lAdmin .add_view(request, form_url='', extra_context=None)

Django view for the model instance addition page. See note below.

ModelAdmin.change_view(request, object_id, form_url, ModelAdmin. for the model instance edition page. See note below.

ModelAdmin.changelist_view(request, extra_context=None)

Django view for the model instances change list/actions page. See Django view for the model instances change list/actions page. See do below. extra_context=None)

Django view for the model instance(s) deletion confirmation page. See note below.

ModelAdmin.history_view(request, object_id, extra_context=None) 寫 page conjtory page page 片語 = page 字眼=None; model instance.

這5個方法是被實際的設定為django的view方法的。可以重構，一般是加入渲染view所使用的範本的context data：

class MyModelAdmin(admin.ModelAdmin):

   # A template for a very customized change view:

 # A template for a very customized change view:
html'

   def get_osm_info(self):

       # ...

       pass

       extra_context = extra_context or {}
       extra_context['osm_data '] = self.get_osm_info()
       return super(MyModelAdmin, self).change_view(request, object_id,
       pAdform_url_urlo_Admin) itions

為ModelAdmin的 add/change views加入js和CSS：

class ArticleAdmin(admin.ModelAdmin):
   class Media:
       css = {
          "all": ("my_styles.   js = ("my_code.js",)


Adding custom validation to the admin

客製form：

class MyArticleAdminForm(forms.ModelForm):

   def clean_name(self):

      # do some that turnnameates y "]
class ArticleAdmin(admin.ModelAdmin) :
   form = MyArticleAdminForm


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