10-crm项目-kingadmin，删除功能

删除功能

（1）kingadmin/urls.py

urlpatterns = [
    url(r'^$', views.index,name="table_index"),
    url(r'^(w+)/(w+)/$', views.display_table_objs,name="table_objs"),
    url(r'^(w+)/(w+)/(d+)/change/$', views.table_obj_change,name="table_obj_change"),
    url(r'^(w+)/(w+)/(d+)/change/password/$', views.password_reset,name="password_reset"),
    url(r'^(w+)/(w+)/(d+)/delete/$', views.table_obj_delete,name="obj_delete"),
    url(r'^(w+)/(w+)/add/$', views.table_obj_add,name="table_obj_add"),

]

（2） html

先在修改详情页的html，增加一个删除的按钮：

{% if not admin_class.readonly_table %}  ------看是否是只读表，如果是只读表，就不会有删除按钮
      <div class="form-group">

          {% block obj_delete %}
          <div class="col-sm-2">
                <a class="btn btn-danger" href="{% url 'obj_delete' app_name table_name form_obj.instance.id %}">Delete</a>
          </div>
          {% endblock %}
          <div class="col-sm-10 ">
            <button type="submit" class="btn btn-success pull-right">Save</button>
          </div>
      </div>
    {% endif %}

然后新增一个删除页面：

{% extends 'king_admin/table_index.html' %}
{% load tags %}
{% block container %}

    {% display_obj_related objs  %}

    <ul style="color: red">
    {% for k,v in errors.items %}
        <li>{{ k }}:{{ v }}</li>
    {% endfor %}
    </ul>
    <form method="post">{% csrf_token %}
        <input type="submit" class="btn btn-danger" value="Yes,I'm sure">
        <input type="hidden" value="yes" name="delete_confirm">
        <input type="hidden" value="{{ selected_ids }}" name="selected_ids">
        <input type="hidden" value="{{ action }}" name="action">
        <a class="btn btn-info" href="{% url 'table_objs' app_name table_name  %}">No,Take me back</a>
    </form>


{% endblock %}

删除的时候如果有关联数据要删除，需要提示：

def recursive_related_objs_lookup(objs):
    #model_name = objs[0]._meta.model_name
    ul_ele = "<ul>"
    for obj in objs:
        li_ele = '''<li> %s: %s </li>'''%(obj._meta.verbose_name,obj.__str__().strip("<>"))
        ul_ele += li_ele

        #for local many to many
        #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字段取出来了
            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  #最终跟最外层的ul相拼接


        for related_obj in obj._meta.related_objects:
            if 'ManyToManyRel' in related_obj.__repr__():

                if hasattr(obj, related_obj.get_accessor_name()):  # hassattr(customer,'enrollment_set')
                    accessor_obj = getattr(obj, related_obj.get_accessor_name())
                    print("-------ManyToManyRel",accessor_obj,related_obj.get_accessor_name())
                    # 上面accessor_obj 相当于 customer.enrollment_set
                    if hasattr(accessor_obj, 'select_related'):  # slect_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'): # slect_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:
                    #print("33[31;1mdeeper layer lookup -------33[0m")
                    #nodes = recursive_related_objs_lookup(target_objs,model_name)
                    nodes = recursive_related_objs_lookup(target_objs)
                    ul_ele += nodes
    ul_ele +="</ul>"
    return ul_ele

@register.simple_tag
def display_obj_related(objs):
    '''把对象及所有相关联的数据取出来'''
    #objs = [objs,] #fake
    if objs:
        model_class = objs[0]._meta.model
        mode_name = objs[0]._meta.model_name
        return mark_safe(recursive_related_objs_lookup(objs))

 （3）kingamdin/views.py

@login_required
def table_obj_delete(request,app_name,table_name,obj_id):
    admin_class = king_admin.enabled_admins[app_name][table_name]

    obj = admin_class.model.objects.get(id=obj_id)
    if  admin_class.readonly_table:
        errors = {"readonly_table": "table is readonly ,obj [%s] cannot be deleted" % obj}
    else:
        errors = {}
    if request.method == "POST":
        if not admin_class.readonly_table:
            obj.delete()
            return redirect("/king_admin/%s/%s/" %(app_name,table_name))

    return render(request,"king_admin/table_obj_delete.html",{"obj":obj,
                                                              "admin_class":admin_class,
                                                              "app_name": app_name,
                                                              "table_name": table_name,
                                                              "errors":errors
                                                              })

  

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