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stark 增删改

發布時間：2024/9/3 编程问答 28 豆豆

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優雅裝飾器

import functoolsdef wrapper(func):@functools.wraps(func)# 保留原函數的信息def inner(*args, **kwargs):return func(*args, **kwargs)return inner @wrapper def f1():print('f1')@wrapper def f2():print('f1')print(f1.__name__) print(f2.__name__) """ 之前 inner inner """""" 之后 f1 f2 """ 裝飾器保留原函數的信息

判斷是函數，還是變量

判斷arg是函數則打印1，arg是方法則打印2from types import MethodType,FunctionType def check(arg):"""判斷arg是函數則打印1，arg是方法則打印2:param arg::return:"""if isinstance(arg,MethodType):print(2)elif isinstance(arg,FunctionType):print(1)else:print('不認識')def func():passclass Foo(object):def display(self):passcheck(func) check(Foo.display) check(Foo().display)""" 1 1 2 """ from types import MethodType,FunctionType

類傳變量的一種方式

?? 實例方法傳參,要傳實例對象本身

class RoleConfig(object):def f1(self, arg):print('f1', arg)def f2(self, arg):print('f2', arg)list_display = [f1, f2]obj = RoleConfig() for item in RoleConfig.list_display:item(obj, 2)# obj就是self,實例變量本身# 傳變量的一種方式 view

利用列表儲存函數對象

一個進程兩次調用類變量class RoleConfig(object):def f1(self, arg):print('f1', arg)def f2(self, arg):print('f2', arg)def f3(self, arg):print('f3', arg)list_display = [f1, f2]def get_list_display(self):self.list_display.insert(0, RoleConfig.f3)return self.list_display obj1 = RoleConfig() for item in obj1.get_list_display():item(obj1, 2) # 剛開始這時候列表里還沒有，加進f3,obj2 = RoleConfig() for item in obj2.get_list_display():print('obj2----')item(obj2, 6) # 這時候列表里有了f3,再插入一個f3反回。所以此處列表里有四個# 利用類的變量列表，儲存對象 # 一個進程對類操作了兩次 """ f3 2 f1 2 f2 2 f3 6 f3 6 f1 6 f2 6 """ viewclass RoleConfig(object):def f1(self, arg):print('f1', arg)def f2(self, arg):print('f2', arg)def f3(self, arg):print('f3', arg)list_display = [f1, f2]def get_list_display(self):v = []v.extend(self.list_display)v.insert(0, RoleConfig.f3)return vobj1 = RoleConfig()#[f1,f2] for item in obj1.get_list_display():# [f3,f1,f2]item(obj1, 2)print('---------------')obj2 = RoleConfig()#[f1,f2]for item in obj2.get_list_display(): #[f3,f1,f2]item(obj2, 6)print('+++++')""" f3 2 --------------- f3 6 f1 6 f2 6 +++++ f1 2 --------------- f3 6 f1 6 f2 6 +++++ f2 2 --------------- f3 6 f1 6 f2 6 +++++ """ view

利用yield取數據

不要一次性取出來，占內存以前的：def func(request):result = []data_list = models.Users.objects.all()for row in data_list:temp = "%s%s" (row.name,row.pwd,)result.append(temp)return render(request,'xxx.html',{'result':result})xxx.html{% for row in result %}{{row}}{% endfor%}現在的：def get_result(data_list):for row in data_list:temp = "%s%s" (row.name,row.pwd,)yield tempdef func(request):data_list = models.Users.objects.all()result = get_result(data_list)return render(request,'xxx.html',{'result':result})xxx.html{# 生成器，不斷去調用#}{% for row in result %}{{row}}{% endfor%} view

復選框實現

復選框函數 mark_safe

def display_checkbox(self, row=None, header=False):# 選擇框功能默認None,表頭如果是表頭，則顯示相應字段if header:return "選擇" # 表頭第一個字段，可以自定制return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk)# 安全渲染**** 選中行數據pkview

復選框函數實現與顯示

調用復選框函數，拿到標簽渲染

def changelist_view(self, request):# 所有URL的查看列表頁面# 獲取表所有數據queryset = self.model_class.objects.all().order_by(*self.get_order_by())# 要顯示的字段list_display = self.list_displayheader_list = [] # 表頭列表if list_display: # 判斷有沒有顯示字段for name_or_func in list_display:if isinstance(name_or_func, FunctionType): # 判斷是不是函數，是則執行verbose_name = name_or_func(self, header=True)else: # 不是函數，則按規則去取字段的名稱verbose_name = self.model_class._meta.get_field(name_or_func).verbose_nameheader_list.append(verbose_name)else: # 沒有顯示字段列表，取表名作為表頭header_list.append(self.model_class._meta.model_name)body_list = [] # 表體列表for row in queryset: # 從查找到的queryset對象里取row_list = [] # 行列表if not list_display: # 沒有規定顯示的字段row_list.append(row) # 直接將一條queryset 放到行列表里面body_list.append(row_list) # 再放到表體continuefor name_or_func in list_display: # 按照要顯示的字段，取數據，遇到函數就執行顯示復選框，并返回該行對象if isinstance(name_or_func, FunctionType): # 判斷是否是功能函數val = name_or_func(self, row=row) # 執行函數反回功能內容else: # 其他字段的數據正常取val = getattr(row, name_or_func) # getattr 映射每個要顯示字段名 ,取queryset里面的字段值row_list.append(val) # 添加到行body_list.append(row_list) # 添加到表體# 反回渲染頁面return render(request, 'stark/changelist.html', {'header_list': header_list, 'body_list': body_list}) view

前端頁面

??? 循環取值

<div><table class="table table-bordered"> {# 基于bootstrap 創建table表 #}<thead> {# 表頭 #}<tr>{% for item in header_list %}<th>{{ item }}</th>{% endfor %}</tr></thead><tbody> {# 表體 #}{% for row_list in body_list %}<tr>{% for col in row_list %}<td>{{ col }}</td>{% endfor %}</tr>{% endfor %}</tbody></table></div> view

自定義的配置類

from stark.service.stark import site, StarkConfig from app01 import modelssite.register(models.UserInfo)class DepartConfig(StarkConfig):# 自定義的配置類list_display = [StarkConfig.display_checkbox,'id', 'name', 'user']# 自定義的顯示字段site.register(models.Depart, DepartConfig) view

編輯刪除功能函數實現

def display_edit(self, row=None, header=False):if header:return "編輯"return mark_safe('<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row))def display_del(self, row=None, header=False):if header:return "刪除"return mark_safe('<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row))def display_edit_del(self, row=None, header=False):if header:return "操作"tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> |<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>""" %(self.reverse_edit_url(row),self.reverse_del_url(row),)return mark_safe(tpl)list display function前端循環取組裝好的列表里面的值即可{% block content %}<div>{% if add_btn %}<div style="margin: 5px 0;">{{ add_btn }}</div>{% endif %}<table class="table table-bordered"><thead><tr>{% for item in header_list %}<th>{{ item }}</th>{% endfor %}</tr></thead><tbody>{% for row_list in body_list %}<tr>{% for col in row_list %}<td>{{ col }}</td>{% endfor %}</tr>{% endfor %}</tbody></table></div> {% endblock %} view

添加數據功能實現

modeform 實現表單更改驗證

model_form_class = Nonedef get_add_btn(self):return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url())def get_model_form_class(self):"""獲取ModelForm類 # 用于編輯和添加數據的表單 :return: #根據是否有自定義配置，返回不同表單"""if self.model_form_class:return self.model_form_class # 其他表的配置，如果有自定義的表單則返回自定義的class AddModelForm(forms.ModelForm): # 添加功能的表單，所有數據都需要填寫，所以默認所有字段都要class Meta:model = self.model_classfields = "__all__"return AddModelForm ModelForm

def changelist_view(self, request):"""所有URL的查看列表頁面 # 將添加按鈕功能，添加到這頁面視圖:param request::return:"""queryset = self.model_class.objects.all().order_by(*self.get_order_by())# ##### 添加按鈕 ######add_btn = self.get_add_btn()......def add_view(self, request):"""所有添加頁面，都在此函數處理使用ModelForm實現:param request::return:"""AddModelForm = self.get_model_form_class()if request.method == "GET":form = AddModelForm()return render(request, 'stark/change.html', {'form':form})form = AddModelForm(request.POST) # 校驗數據if form.is_valid():form.save() # 保存return redirect(self.reverse_list_url()) # 添加完反回主頁面return render(request, 'stark/change.html', {'form': form}) add_viewclass AdminSite(object):def __init__(self):self._registry = {}self.app_name = 'stark'self.namespace = 'stark'def register(self, model_class, stark_config=None):"""注冊表類:param model_class: 表類class:param stark_config: 自定義配置:return:"""if not stark_config:stark_config = StarkConfigself._registry[model_class] = stark_config(model_class, self) # 實例對象傳參"""{models.UserInfo: StarkConfig(models.UserInfo), # 封裝：model_class=UserInfo，site=site對象models.Role: RoleConfig(models.Role) # 封裝：model_class=Role，site=site對象}"""def get_urls(self):# 獲取urlurlpatterns = [] #url 列表# urlpatterns.append(url(r'^x3/', ([# url(r'^add/', self.x1),# url(r'^change/', self.x1),# url(r'^del/', self.x1),# url(r'^edit/', self.x1),# ],None,None)))for k, v in self._registry.items():# k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封裝：model_class=UserInfo，site=site對象# k=modes.Role,v=RoleConfig(models.Role) # 封裝：model_class=Role，site=site對象app_label = k._meta.app_labelmodel_name = k._meta.model_nameurlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None)))# 表類所在app/表類名的組裝一個表類綁定的操作urlreturn urlpatterns@propertydef urls(self):return self.get_urls(), self.app_name, self.namespace# url列表 # 返回的元組site = AdminSite() AdminSite

編輯視圖函數def change_view(self, request, pk):"""所有編輯頁面:param request::param pk: 操作該條數據的pk,路由有設置:return:"""obj = self.model_class.objects.filter(pk=pk).first()if not obj:return HttpResponse('數據不存在')ModelFormClass = self.get_model_form_class()if request.method == 'GET':form = ModelFormClass(instance=obj) # instance=obj 默認原先的編輯數據return render(request,'stark/change.html',{'form':form})form = ModelFormClass(data=request.POST,instance=obj)if form.is_valid():form.save()return redirect(self.reverse_list_url())return render(request, 'stark/change.html', {'form': form})編輯視圖處理函數{% block content %}<div style="width: 680px;margin: 0 auto;"><form class="change" method="post">{% csrf_token %}{% for filed in form %}<div class="form-group"><label>{{ filed.label }}</label>{{ filed }}{{ filed.errors.0 }}</div>{% endfor %}<button type="submit" class="btn btn-default">Submit</button></form></div> {% endblock %} 編輯前端頁面def delete_view(self, request, pk):"""所有刪除頁面:param request::param pk::return:"""if request.method == "GET":return render(request,'stark/delete.html',{'cancel_url':self.reverse_list_url()})# 跳轉到確認頁面 # 取消反回的urlself.model_class.objects.filter(pk=pk).delete() # 不是GET請求，說明確認刪除return redirect(self.reverse_list_url())刪除視圖處理函數{% extends 'stark/layout.html' %} {% block css %}{% endblock %} {% block content %}<div ><form method="post">{% csrf_token %}<p>是否確定要刪除？</p><a href="{{ cancel_url }}" class="btn btn-default">取消</a><button type="submit" class="btn btn-danger">確認</button></form></div> {% endblock %}刪除確認頁面def get_urls(self):info = self.model_class._meta.app_label, self.model_class._meta.model_nameurlpatterns = [url(r'^list/$', self.wrapper(self.changelist_view), name='%s_%s_changelist' % info),url(r'^add/$', self.wrapper(self.add_view), name='%s_%s_add' % info),url(r'^(?P<pk>\d+)/change/', self.wrapper(self.change_view), name='%s_%s_change' % info),url(r'^(?P<pk>\d+)/del/', self.wrapper(self.delete_view), name='%s_%s_del' % info),]extra = self.extra_url()if extra:urlpatterns.extend(extra)return urlpatterns def extra_url(self):pass 每張表類綁定的路由

反向解析，前端提交變更的路由路徑

def reverse_list_url(self):app_label = self.model_class._meta.app_labelmodel_name = self.model_class._meta.model_namenamespace = self.site.namespacename = '%s:%s_%s_changelist' % (namespace, app_label, model_name)list_url = reverse(name)return list_urldef reverse_add_url(self):app_label = self.model_class._meta.app_labelmodel_name = self.model_class._meta.model_namenamespace = self.site.namespacename = '%s:%s_%s_add' % (namespace, app_label, model_name)add_url = reverse(name)return add_urldef reverse_edit_url(self,row):app_label = self.model_class._meta.app_labelmodel_name = self.model_class._meta.model_namenamespace = self.site.namespacename = '%s:%s_%s_change' % (namespace, app_label, model_name)edit_url = reverse(name, kwargs={'pk': row.pk})return edit_urldef reverse_del_url(self,row):app_label = self.model_class._meta.app_labelmodel_name = self.model_class._meta.model_namenamespace = self.site.namespacename = '%s:%s_%s_del' % (namespace, app_label, model_name)del_url = reverse(name, kwargs={'pk': row.pk})return del_url@property def urls(self):return self.get_urls() 路由解析
應用配置app01/stark.py
class DepartModelForm(forms.ModelForm):class Meta:model = models.Departfields = "__all__"def clean_name(self):return self.cleaned_data['name']class DepartConfig(StarkConfig): #繼承默認配置類list_display = [StarkConfig.display_checkbox, 'id', 'name', 'tel', 'user', StarkConfig.display_edit_del]model_form_class = DepartModelFormdef changelist_view(self, request):return HttpResponse('自定義列表頁面')site.register(models.Depart, DepartConfig) view

class AdminSite(object):def __init__(self):self._registry = {}self.app_name = 'stark'self.namespace = 'stark'def register(self, model_class, stark_config=None):"""注冊表類:param model_class: 表類class:param stark_config: 自定義配置:return:"""if not stark_config:stark_config = StarkConfigself._registry[model_class] = stark_config(model_class, self) # 實例對象傳參"""{models.UserInfo: StarkConfig(models.UserInfo), # 封裝：model_class=UserInfo，site=site對象models.Role: RoleConfig(models.Role) # 封裝：model_class=Role，site=site對象}"""def get_urls(self):# 獲取urlurlpatterns = [] #url 列表# urlpatterns.append(url(r'^x3/', ([# url(r'^add/', self.x1),# url(r'^change/', self.x1),# url(r'^del/', self.x1),# url(r'^edit/', self.x1),# ],None,None)))for k, v in self._registry.items():# k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封裝：model_class=UserInfo，site=site對象# k=modes.Role,v=RoleConfig(models.Role) # 封裝：model_class=Role，site=site對象app_label = k._meta.app_labelmodel_name = k._meta.model_nameurlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None)))# 表類所在app/表類名的組裝一個表類綁定的操作urlreturn urlpatterns@propertydef urls(self):return self.get_urls(), self.app_name, self.namespace# url列表 # 返回的元組site = AdminSite()class AdminSite

自定義思路a.有自定義配置類的，重寫繼承的默認類變量，然后再由類方法自己去調用b. 在自定義配置類，直接重寫繼承配置類的默認方法

1. 排序規則2. 顯示列第一種方法：class UserInfoConfig(StarkConfig):list_display = ['id','title',StarkConfig.display_edit,StarkConfig.display_del]site.register(models.UserInfo,UserInfoConfig)第二種方法：class UserInfoConfig(StarkConfig):order_by = ['-id']def get_list_display(self):return ['id','title',StarkConfig.display_edit,StarkConfig.display_del] 1. 排序規則3. 添加按鈕class UserInfoConfig(StarkConfig):list_display = ['id','title',StarkConfig.display_edit,StarkConfig.display_del]def get_add_btn(self):# 顯示 # return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url())# 不顯示return Nonesite.register(models.UserInfo,UserInfoConfig) 3. 添加按鈕4. 定制ModelForm第一種方法：class DepartModelForm(forms.ModelForm):class Meta:model = models.Departfields = "__all__"def clean_name(self):return self.cleaned_data['name']class DepartConfig(StarkConfig):list_display = [StarkConfig.display_checkbox,'id', 'name', 'tel', 'user',StarkConfig.display_edit_del]model_form_class = DepartModelForm第二種方法：class DepartModelForm(forms.ModelForm):class Meta:model = models.Departfields = "__all__"def clean_name(self):return self.cleaned_data['name']class DepartConfig(StarkConfig):list_display = [StarkConfig.display_checkbox,'id', 'name', 'tel', 'user',StarkConfig.display_edit_del]def get_model_form_class(self):return DepartModelForm 4. 定制ModelForm5. 自定義列表頁面class DepartConfig(StarkConfig):list_display = [StarkConfig.display_checkbox,'id', 'name', 'tel', 'user',StarkConfig.display_edit_del]model_form_class = DepartModelFormdef changelist_view(self, request):return HttpResponse('自定義列表頁面')site.register(models.Depart, DepartConfig)6. 增加URLclass RoleConfig(StarkConfig):order_by = ['-id', ]list_display = [StarkConfig.display_checkbox,'id','title',StarkConfig.display_edit,StarkConfig.display_del]def extra_url(self):data = [url(r'^xxxxxxx/$', self.xxxxxx),]return datadef xxxxxx(self,request):print('....')return HttpResponse('xxxxx')site.register(models.Role,RoleConfig)7. 自定制URLclass RoleConfig(StarkConfig):order_by = ['-id', ]list_display = [StarkConfig.display_checkbox,'id','title']def get_add_btn(self):return Falsedef extra_url(self):data = [url(r'^xxxxxxx/$', self.xxxxxx),]return datadef xxxxxx(self,request):print('....')return HttpResponse('xxxxx')def get_urls(self):info = self.model_class._meta.app_label, self.model_class._meta.model_nameurlpatterns = [url(r'^list/$', self.wrapper(self.changelist_view), name='%s_%s_changelist' % info),]extra = self.extra_url()if extra:urlpatterns.extend(extra)return urlpatternssite.register(models.Role,RoleConfig) 5. 自定義列表頁面

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