CRM删除数据——24天

1、在table_objs_change.html文件加上删除按钮：

<div class="col-sm-2">
                <button type="button" class="btn btn-danger">
                    <a href="{% url 'table_objs_delete' app_name table_name form_obj.instance.id %}">Delete</a>
                </button>
 </div>

2、在urls.py文件中加上url:

    url(r'^(w+)/(w+)/(d+)/delete/$', views.table_objs_delete, name='table_objs_delete'),

3、新建table_objs_delete.html文件：

{% extends "kindadmin/table_index.html"%}
{% load tags %}

{% block container%}
    
    {% display_obj_related obj %}
{% endblock%}

4、在view.py文件中返回table_objs_delete.html页面：

def table_objs_delete(request,app_name,table_name,obj_id):
    """
    #删除数据
    :param request:
    :param app_name: crm
    :param table_name: Costomer
    :param obj_id: Costomer.id
    :return:
    """
    admin_class = kind_admin.enabled_admins[app_name][table_name]
    obj = admin_class.model.objects.get(id=obj_id)
    return render(request,"kindadmin/table_objs_delete.html",{"admin_class":admin_class,
                                                              "obj":obj})

5、在tags.py文件中处理返回页面的逻辑，表onetonone,manytomany的关系取值，利用递归去一层层的找（这个有点蒙）

@register.simple_tag
def recursive_related_objs_lookup(objs):
    #model_name = objs[0]._meta.model_namme

    #m = models.Customer.objects.get(id=20)
    ul_ele = "<ul>"
    for obj in objs:
        li_ele = '''<li>%s:%s</li>'''%(obj._meta.verbose_name,obj.__str__().strip("<>"))
        ul_ele +=li_ele

        #many_to_many的对象
        #print("------- obj._meta.local_many_to_many", obj._meta.local_many_to_many)
        for m2m_field in obj._meta.local_many_to_many: #把所有跟这个对象直接关联的m2m字段取出来
            sub_ul_ele = "<ul>"
            m2m_field_obj = getattr(obj,m2m_field.name) #getattr(customer,'tags')
            for o in m2m_field_obj.select_related(): #customer.tags.select_related()
                li_ele ='''<li>%s:%s</li>''' %(m2m_field.verbose_name,o.__str__().strip("<>"))
                sub_ul_ele+=li_ele
            sub_ul_ele +="</ul>"
            ul_ele +=sub_ul_ele #最后跟最外层的ul相拼接
        #一对一的
        #red =m._meta.related_objects
        for related_obj in obj._meta.related_objects:
            #red[1].__repr__()
            if 'ManyToManyRel' in related_obj.__repr__():
                #hasattr(m,red[0].get_accessor_name())
                if hasattr(obj,related_obj.get_accessor_name()):
                    #getattr(m,red[0].get_accessor_name())
                    accessor_obj = getattr(obj,related_obj.get_accessor_name())
                    #上面的accessor_obj相当于customer.enrollment_set
                    if hasattr(accessor_obj,'select_related'): #select_related()==all()
                        target_objs = accessor_obj.select_related() # .filter(**filter_coditions)
                        # target_objs 相当于 customer.enrollment_set.all()
                        sub_ul_ele = "<ul style='color:red'>"
                        for o in target_objs:
                            li_ele = '''<li> %s:%s </li>''' %(o._.meta.verbose_name,o.__str__().strip("<>"))
                            sub_ul_ele+=li_ele
                        sub_ul_ele+="</ul>"
                        ul_ele+=sub_ul_ele
            elif hasattr(obj,related_obj.get_accessor_name()): ## hassattr(customer,'enrollment_set')
                accessor_obj = getattr(obj,related_obj.get_accessor_name())
                # 上面accessor_obj 相当于 customer.enrollment_set
                if hasattr(accessor_obj,'select_related'): #select_related() == all()
                    target_objs = accessor_obj.select_related() ##.filter(**filter_coditions)
                    # target_objs 相当于 customer.enrollment_set.all()

                else:
                    print("one to one i guess:",accessor_obj)
                    target_objs = accessor_obj
                if len(target_objs) >0:
                    nodes = recursive_related_objs_lookup(target_objs)
                    ul_ele += nodes
    ul_ele+="</ul>"
    return ul_ele

@register.simple_tag
def display_obj_related(obj):
    objs = [obj,]
    if objs:
        model_class = objs[0]._meta.model #models.Customer
        model_name = objs[0]._meta.model_name

        return mark_safe(recursive_related_objs_lookup(objs))

在删除页面内容如下：