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如下所示:
希望可以從對(duì)admin提交的密碼加密,并驗(yàn)證電話號(hào)碼均為數(shù)字。
查看admin.py
from django.contrib import admin class courseAdmin(admin.ModelAdmin)
我們自定義的管理類,繼承與admin.ModelAdmin
查看對(duì)應(yīng)admin模塊對(duì)應(yīng)源碼
__init__.py
from django.contrib.admin.options import ( HORIZONTAL, VERTICAL, ModelAdmin, StackedInline, TabularInline,FaultyAdmin, ) 從django.contrib.admin.options導(dǎo)入 ModelAdmin options.py ModelAdmin源碼比較長(zhǎng),就不全部列出了,看比較關(guān)鍵的地方 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函數(shù)
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)
這里找到form表單的內(nèi)容
form.is_valid()
驗(yàn)證表單內(nèi)容是否合法,查看這個(gè)函數(shù)
首先找到ModelForm類
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)
上面列出函數(shù)在表單驗(yàn)證的過(guò)程中,順序調(diào)用,可以看到添加錯(cuò)誤的主要函數(shù)為_(kāi)clean_fields,雖然沒(méi)有繼續(xù)仔細(xì)查看,但感覺(jué)關(guān)鍵在于field.clean(value),對(duì)應(yīng)的field在我們聲明對(duì)應(yīng)model類時(shí)會(huì)保存相應(yīng)字段的信息,這里做檢查,如果不符合,則raise ValidationError,符合的haul就把新的數(shù)據(jù)放入到表單的cleaned_data中。
這一段來(lái)自官網(wǎng)的教程,這里指出錯(cuò)誤信息的關(guān)鍵字包括,null, blank, invalid, invalid_choice, unique, and unique_for_date。剛才的clean函數(shù)應(yīng)該就是檢查這些地方。
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.
到了這一部,基本已經(jīng)可以達(dá)到目的了,我們可以看到 self.add_error函數(shù)。
然后回到options.py的ModelAdmin,我們可以寫(xiě)一個(gè)類繼承ModelAdmin,然后重寫(xiě)新類的_changeform_view函數(shù),避免對(duì)其它部分造成影響。
重寫(xiě)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','電話號(hào)碼必須為純數(shù)字') if not re.match('\d+',form.data['number']): form_validated=False form.add_error('number','學(xué)工號(hào)必須為純數(shù)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)
以上這篇自定義django admin model表單提交的例子就是小編分享給大家的全部?jī)?nèi)容了,希望能給大家一個(gè)參考,也希望大家多多支持億速云。
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