Model實例,myapp/models.py：
from django.db import modelsclass Blog(models.Model): name = models.CharField(max_length=100) tagline = models.TextField() # On Python 3: def __str__(self): def __unicode__(self): return self.name class Author(models.Model): name = models.CharField(max_length=50) email = models.EmailField() # On Python 3: def __str__(self): def __unicode__(self): return self.name class Entry(models.Model): blog = models.ForeignKey(Blog) headline = models.CharField(max_length=255) body_text = models.TextField() pub_date = models.DateField() mod_date = models.DateField() authors = models.ManyToManyField(Author) n_comments = models.IntegerField() n_pingbacks = models.IntegerField() rating = models.IntegerField() # On Python 3: def __str__(self): def __unicode__(self): return self.headline
默認情況下，superuser可以訪問admin界面的所有Model，但有時候只想讓一些用戶只能訪問一些特定的Model。
可以定制自己的User對象的has_perm()方法：
class MyUser(AbstractBaseUser): ... def has_perm(self, perm, obj=None): if self.is_superuser: return True elif self.can_edit: if perm=='myapp.add_entry': return True else: return False else: return False
這樣superuser具有全部權限。普通user的can_edit屬性為True時，就具有了創建Entry實例的權限，其余用戶無權限。
也可以定制ModelAdmin的has_add_permission(),has_change_permission(),has_delete_permission()方法：
def has_add_permission(self, request): """ Returns True if the given request has permission to add an object. Can be overridden by the user in subclasses. """ opts = self.opts codename = get_permission_codename('add', opts) if request.user.can_edit: return True else: return request.user.has_perm("%s.%s" % (opts.app_label, codename))不同權限的可以編輯不同的內容，可以通過get_readonly_fileds()來添加字段只讀權限。
class EntryAdmin(admin.ModelAdmin): list_display=(...) search_fields=(...) def get_readonly_fields(self,request,obj=None): if not request.user.is_superuser and not request.user.can_edit: return [f.name for f in self.model._meta.fields] return self.readonly_fields
可以直接重寫model的save()方法：
from django.db import modelsclass Blog(models.Model): name = models.CharField(max_length=100) tagline = models.TextField() def save(self, *args, **kwargs): do_something() super(Blog, self).save(*args, **kwargs) # Call the "real" save() method. do_something_else()
阻止save()：
from django.db import modelsclass Blog(models.Model): name = models.CharField(max_length=100) tagline = models.TextField() def save(self, *args, **kwargs): if self.name == "Yoko Ono's blog": return # Yoko shall never have her own blog! else: super(Blog, self).save(*args, **kwargs) # Call the "real" save() method.
也可以重寫ModelAdmin的save_model()方法，根據不同的用戶定制不同的save行為：
from django.contrib import adminclass ArticleAdmin(admin.ModelAdmin): def save_model(self, request, obj, form, change): obj.user = request.user obj.save()
其中obj是修改后的對象，當新建一個對象時 change = False, 當修改一個對象時 change = True，可以獲得修改前的對象：
from django.contrib import adminclass ArticleAdmin(admin.ModelAdmin): def save_model(self, request, obj, form, change): if change: obj_old = self.model.objects.get(pk=obj.pk) else: obj_old = None obj.user = request.user obj.save()
ModelAdmin提供了一個鉤子程序 —— 它有一個名為queryset() 的方法，該方法可以確定任何列表頁面返回的默認查詢集。
class MyModelAdmin(admin.ModelAdmin): def get_queryset(self, request): qs = super(MyModelAdmin, self).get_queryset(request) if request.user.is_superuser: return qs return qs.filter(author=request.user)
從django.contrib.admin.SimpleListFilter繼承一個子類，提供title和parameter_name屬性，并重寫 lookups和queryset方法。
from datetime import datefrom django.contrib import adminfrom django.utils.translation import ugettext_lazy as _class DecadeBornListFilter(admin.SimpleListFilter): # Human-readable title which will be displayed in the # right admin sidebar just above the filter options. title = _('decade born') # Parameter for the filter that will be used in the URL query. parameter_name = 'decade' def lookups(self, request, model_admin): """ Returns a list of tuples. The first element in each tuple is the coded value for the option that will appear in the URL query. The second element is the human-readable name for the option that will appear in the right sidebar. """ return ( ('80s', _('in the eighties')), ('90s', _('in the nineties')), ) def queryset(self, request, queryset): """ Returns the filtered queryset based on the value PRovided in the query string and retrievable via `self.value()`. """ # Compare the requested value (either '80s' or '90s') # to decide how to filter the queryset. if self.value() == '80s': return queryset.filter(birthday__gte=date(1980, 1, 1), birthday__lte=date(1989, 12, 31)) if self.value() == '90s': return queryset.filter(birthday__gte=date(1990, 1, 1), birthday__lte=date(1999, 12, 31))class PersonAdmin(admin.ModelAdmin): list_filter = (DecadeBornListFilter,)parameter_name和title是必須的。look_up方法返回出現在列表頁右側過濾器中的選項和描述。parameter_name為附加在url后面get請求的參數名，self.value()返回該參數對應的值。
根據不同的用戶定制：
class AuthDecadeBornListFilter(DecadeBornListFilter): def lookups(self, request, model_admin): if request.user.is_superuser: return super(AuthDecadeBornListFilter, self).lookups(request, model_admin) def queryset(self, request, queryset): if request.user.is_superuser: return super(AuthDecadeBornListFilter, self).queryset(request, queryset)
model_admin為ModelAdmin實例：
class AdvancedDecadeBornListFilter(DecadeBornListFilter): def lookups(self, request, model_admin): """ Only show the lookups if there actually is anyone born in the corresponding decades. """ qs = model_admin.get_queryset(request) if qs.filter(birthday__gte=date(1980, 1, 1), birthday__lte=date(1989, 12, 31)).exists(): yield ('80s', _('in the eighties')) if qs.filter(birthday__gte=date(1990, 1, 1), birthday__lte=date(1999, 12, 31)).exists(): yield ('90s', _('in the nineties'))class PersonAdmin(admin.ModelAdmin): list_display = ('name', 'age') search_fields = ('name',) def get_search_results(self, request, queryset, search_term): queryset, use_distinct = super(PersonAdmin, self).get_search_results(request, queryset, search_term) try: search_term_as_int = int(search_term) except ValueError: pass else: queryset |= self.model.objects.filter(age=search_term_as_int) return queryset, use_distinctqueryset是查詢集，search_term是搜索詞。
在添加對象時顯示外鍵選項時，太多的選項不太友好，這時候需要過濾出符合要求的對象供選擇。
class MyModelAdmin(admin.ModelAdmin): def formfield_for_foreignkey(self, db_field, request, **kwargs): if db_field.name == "car": kwargs["queryset"] = Car.objects.filter(owner=request.user) return super(MyModelAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)
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