您好,登录后才能下订单哦!
如下所示:
希望可以从对admin提交的密码加密,并验证电话号码均为数字。
查看admin.py
from django.contrib import admin class courseAdmin(admin.ModelAdmin)
我们自定义的管理类,继承与admin.ModelAdmin
查看对应admin模块对应源码
__init__.py
from django.contrib.admin.options import ( HORIZONTAL, VERTICAL, ModelAdmin, StackedInline, TabularInline,FaultyAdmin, ) 从django.contrib.admin.options导入 ModelAdmin options.py ModelAdmin源码比较长,就不全部列出了,看比较关键的地方 def get_urls(self): from django.conf.urls import url def wrap(view): def wrapper(*args, **kwargs): return self.admin_site.admin_view(view)(*args, **kwargs) wrapper.model_admin = self return update_wrapper(wrapper, view) info = self.model._meta.app_label, self.model._meta.model_name urlpatterns = [ url(r'^$', wrap(self.changelist_view), name='%s_%s_changelist' % info), url(r'^add/$', wrap(self.add_view), name='%s_%s_add' % info), url(r'^(.+)/history/$', wrap(self.history_view), name='%s_%s_history' % info), url(r'^(.+)/delete/$', wrap(self.delete_view), name='%s_%s_delete' % info), url(r'^(.+)/change/$', wrap(self.change_view), name='%s_%s_change' % info), # For backwards compatibility (was the change url before 1.9) url(r'^(.+)/$', wrap(RedirectView.as_view( pattern_name='%s:%s_%s_change' % ((self.admin_site.name,) + info) ))), ] return urlpatterns
可以看到add操作,交由add_view函数
def add_view(self, request, form_url='', extra_context=None): return self.changeform_view(request, None, form_url, extra_context)
@csrf_protect_m def changeform_view(self, request, object_id=None, form_url='', extra_context=None): with transaction.atomic(using=router.db_for_write(self.model)): return self._changeform_view(request, object_id, form_url, extra_context) def _changeform_view(self, request, object_id, form_url, extra_context): to_field = request.POST.get(TO_FIELD_VAR, request.GET.get(TO_FIELD_VAR)) if to_field and not self.to_field_allowed(request, to_field): raise DisallowedModelAdminToField("The field %s cannot be referenced." % to_field) model = self.model opts = model._meta if request.method == 'POST' and '_saveasnew' in request.POST: object_id = None add = object_id is None if add: if not self.has_add_permission(request): raise PermissionDenied obj = None else: obj = self.get_object(request, unquote(object_id), to_field) if not self.has_change_permission(request, obj): raise PermissionDenied if obj is None: return self._get_obj_does_not_exist_redirect(request, opts, object_id) ModelForm = self.get_form(request, obj) if request.method == 'POST': form = ModelForm(request.POST, request.FILES, instance=obj) if form.is_valid(): form_validated = True new_object = self.save_form(request, form, change=not add) else: form_validated = False new_object = form.instance formsets, inline_instances = self._create_formsets(request, new_object, change=not add) if all_valid(formsets) and form_validated: self.save_model(request, new_object, form, not add) self.save_related(request, form, formsets, not add) change_message = self.construct_change_message(request, form, formsets, add) if add: self.log_addition(request, new_object, change_message) return self.response_add(request, new_object) else: self.log_change(request, new_object, change_message) return self.response_change(request, new_object) else: form_validated = False else: if add: initial = self.get_changeform_initial_data(request) form = ModelForm(initial=initial) formsets, inline_instances = self._create_formsets(request, form.instance, change=False) else: form = ModelForm(instance=obj) formsets, inline_instances = self._create_formsets(request, obj, change=True) adminForm = helpers.AdminForm( form, list(self.get_fieldsets(request, obj)), self.get_prepopulated_fields(request, obj), self.get_readonly_fields(request, obj), model_admin=self) media = self.media + adminForm.media inline_formsets = self.get_inline_formsets(request, formsets, inline_instances, obj) for inline_formset in inline_formsets: media = media + inline_formset.media context = dict( self.admin_site.each_context(request), title=(_('Add %s') if add else _('Change %s')) % force_text(opts.verbose_name), adminform=adminForm, object_id=object_id, original=obj, is_popup=(IS_POPUP_VAR in request.POST or IS_POPUP_VAR in request.GET), to_field=to_field, media=media, inline_admin_formsets=inline_formsets, errors=helpers.AdminErrorList(form, formsets), preserved_filters=self.get_preserved_filters(request), ) # Hide the "Save" and "Save and continue" buttons if "Save as New" was # previously chosen to prevent the interface from getting confusing. if request.method == 'POST' and not form_validated and "_saveasnew" in request.POST: context['show_save'] = False context['show_save_and_continue'] = False # Use the change template instead of the add template. add = False context.update(extra_context or {}) form = ModelForm(request.POST, request.FILES, instance=obj)
这里找到form表单的内容
form.is_valid()
验证表单内容是否合法,查看这个函数
首先找到ModelForm类
在
django\forms\models.py class ModelForm(six.with_metaclass(ModelFormMetaclass, BaseModelForm)): pass
查看BaseModelForm
class BaseModelForm(BaseForm): django\forms\forms.py class BaseForm(object): def is_valid(self): """ Returns True if the form has no errors. Otherwise, False. If errors are being ignored, returns False. """ return self.is_bound and not self.errors @property def errors(self): "Returns an ErrorDict for the data provided for the form" if self._errors is None: self.full_clean() return self._errors def full_clean(self): """ Cleans all of self.data and populates self._errors and self.cleaned_data. """ self._errors = ErrorDict() if not self.is_bound: # Stop further processing. return self.cleaned_data = {} # If the form is permitted to be empty, and none of the form data has # changed from the initial data, short circuit any validation. if self.empty_permitted and not self.has_changed(): return self._clean_fields() self._clean_form() self._post_clean() def _clean_fields(self): for name, field in self.fields.items(): # value_from_datadict() gets the data from the data dictionaries. # Each widget type knows how to retrieve its own data, because some # widgets split data over several HTML fields. #print(type(name)) print(name,field) if field.disabled: value = self.get_initial_for_field(field, name) else: value = field.widget.value_from_datadict(self.data, self.files, self.add_prefix(name)) try: if isinstance(field, FileField): initial = self.get_initial_for_field(field, name) value = field.clean(value, initial) else: value = field.clean(value) self.cleaned_data[name] = value if hasattr(self, 'clean_%s' % name): value = getattr(self, 'clean_%s' % name)() self.cleaned_data[name] = value except ValidationError as e: #print(e) self.add_error(name, e)
上面列出函数在表单验证的过程中,顺序调用,可以看到添加错误的主要函数为_clean_fields,虽然没有继续仔细查看,但感觉关键在于field.clean(value),对应的field在我们声明对应model类时会保存相应字段的信息,这里做检查,如果不符合,则raise ValidationError,符合的haul就把新的数据放入到表单的cleaned_data中。
这一段来自官网的教程,这里指出错误信息的关键字包括,null, blank, invalid, invalid_choice, unique, and unique_for_date。刚才的clean函数应该就是检查这些地方。
The error_messages argument lets you override the default messages that the field will raise. Pass in a dictionary with keys matching the error messages you want to override. Error message keys include null, blank, invalid, invalid_choice, unique, and unique_for_date. Additional error message keys are specified for each field in the Field types section below.
到了这一部,基本已经可以达到目的了,我们可以看到 self.add_error函数。
然后回到options.py的ModelAdmin,我们可以写一个类继承ModelAdmin,然后重写新类的_changeform_view函数,避免对其它部分造成影响。
重写部分如下:
if form.is_valid(): form_validated = True if not re.match('\d+',form.data['tel']): form_validated=False form.add_error('tel','电话号码必须为纯数字') if not re.match('\d+',form.data['number']): form_validated=False form.add_error('number','学工号必须为纯数字') if not form_validated: new_object=form.instance else: passw=form.data['password'] m=md5() m.update(passw.encode('utf-8')) form.data['password']=m.hexdigest() new_object = self.save_form(request, form, change=not add)
以上这篇自定义django admin model表单提交的例子就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持亿速云。
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