Django 内置的admin是对于model中对应的数据表进行增删改查提供的组建
一.Django admin的内部依赖：
依赖的app
django.contrib.auth
django.contrib.contenttypes
django.contrib.messages
django.contrib.sessions
模版：
django.contrib.auth.context_processors.auth
django.contrib.messages.context_processors.messages
中间件：
django.contrib.auth.middleware.AuthenticationMiddleware
django.contrib.messages.middleware.MessageMiddleware
二：配置路由
from django.conf.urls import url,include from django.contrib import admin urlpatterns = [ url(r'^admin/', admin.site.urls), ]
当前配置的路由可以创建一些路由映射关系：
/admin/
/admin/login/
/admin/logout/
/admin/password_change/
/admin/password_change/done/
/admin/app名称/model名称/
/admin/app名称/model名称/add/
/admin/app名称/model名称/ID值/history/
/admin/app名称/model名称/ID值/change/
/admin/app名称/model名称/ID值/delete/
class AdminSite(object): """ An AdminSite object encapsulates an instance of the Django admin application, ready to be hooked in to your URLconf. Models are registered with the AdminSite using the register() method, and the get_urls() method can then be used to access Django view functions that present a full admin interface for the collection of registered models. """ # Text to put at the end of each page's <title>. site_title = ugettext_lazy('Django site admin') # Text to put in each page's <h1>. site_header = ugettext_lazy('Django administration') # Text to put at the top of the admin index page. index_title = ugettext_lazy('Site administration') # URL for the "View site" link at the top of each admin page. site_url = '/' _empty_value_display = '-' login_form = None index_template = None app_index_template = None login_template = None logout_template = None password_change_template = None password_change_done_template = None def __init__(self, name='admin'): self._registry = {} # model_class class -> admin_class instance self.name = name self._actions = {'delete_selected': actions.delete_selected} self._global_actions = self._actions.copy() all_sites.add(self) def register(self, model_or_iterable, admin_class=None, **options): """ Registers the given model(s) with the given admin class. The model(s) should be Model classes, not instances. If an admin class isn't given, it will use ModelAdmin (the default admin options). If keyword arguments are given -- e.g., list_display -- they'll be applied as options to the admin class. If a model is already registered, this will raise AlreadyRegistered. If a model is abstract, this will raise ImproperlyConfigured. """ if not admin_class: admin_class = ModelAdmin if isinstance(model_or_iterable, ModelBase): model_or_iterable = [model_or_iterable] for model in model_or_iterable: if model._meta.abstract: raise ImproperlyConfigured( 'The model %s is abstract, so it cannot be registered with admin.' % model.__name__ ) if model in self._registry: raise AlreadyRegistered('The model %s is already registered' % model.__name__) # Ignore the registration if the model has been # swapped out. if not model._meta.swapped: # If we got **options then dynamically construct a subclass of # admin_class with those **options. if options: # For reasons I don't quite understand, without a __module__ # the created class appears to "live" in the wrong place, # which causes issues later on. options['__module__'] = __name__ admin_class = type("%sAdmin" % model.__name__, (admin_class,), options) # Instantiate the admin class to save in the registry self._registry[model] = admin_class(model, self) def get_urls(self): from django.conf.urls import url, include # Since this module gets imported in the application's root package, # it cannot import models from other applications at the module level, # and django.contrib.contenttypes.views imports ContentType. from django.contrib.contenttypes import views as contenttype_views def wrap(view, cacheable=False): def wrapper(*args, **kwargs): return self.admin_view(view, cacheable)(*args, **kwargs) wrapper.admin_site = self return update_wrapper(wrapper, view) # Admin-site-wide views. urlpatterns = [ url(r'^$', wrap(self.index), name='index'), url(r'^login/$', self.login, name='login'), url(r'^logout/$', wrap(self.logout), name='logout'), url(r'^password_change/$', wrap(self.password_change, cacheable=True), name='password_change'), url(r'^password_change/done/$', wrap(self.password_change_done, cacheable=True), name='password_change_done'), url(r'^jsi18n/$', wrap(self.i18n_javascript, cacheable=True), name='jsi18n'), url(r'^r/(?P<content_type_id>\d+)/(?P<object_id>.+)/$', wrap(contenttype_views.shortcut), name='view_on_site'), ] # Add in each model's views, and create a list of valid URLS for the # app_index valid_app_labels = [] for model, model_admin in self._registry.items(): urlpatterns += [ url(r'^%s/%s/' % (model._meta.app_label, model._meta.model_name), include(model_admin.urls)), ] if model._meta.app_label not in valid_app_labels: valid_app_labels.append(model._meta.app_label) # If there were ModelAdmins registered, we should have a list of app # labels for which we need to allow access to the app_index view, if valid_app_labels: regex = r'^(?P<app_label>' + '|'.join(valid_app_labels) + ')/$' urlpatterns += [ url(regex, wrap(self.app_index), name='app_list'), ] return urlpatterns @property def urls(self): return self.get_urls(), 'admin', self.name