CRM 跳转到数据修改页面、动态生成model,form、增加新增页面——第21天

1、跳转到数据修改页面

1、1 新建一个table_objs_change.html文件，继承kindadmin/table_index.html页面

table_objs_change.html：

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

{% block container %}

    change
    <form class="form-horizontal" method="post">{% csrf_token %}
        <div style="color: red">{{form_obj.errors}}</div>
        {% for filed_form in form_obj%}
        <div class="form-group">
            <label class="col-sm-2 control-label" style="font-weight:normal">
                {% if filed_form.field.required%}
                    <b>{{filed_form.label}}</b>
                {% else %}
                    {{filed_form.label}}
                {% endif %}
            </label>
            <div class="col-sm-10">
              {#<input type="email" id="inputEmail3" placeholder="{{filed_form}}">#}
                {{filed_form}}
            </div>
        </div>
        {% endfor %}
        <div class="form-group">
            <button type="submit" class="btn btn-success pull-right" >SAVE</button>
        </div>

    </form>



{% endblock %}

1.2在urls文件中加上路由的url

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

1.3 url是判断点击页面row=0的可以点击进入页面，在tag.py文件中：

@register.simple_tag
def build_table_raw(obj,admin_class,request):
    """

    :param obj: admin_class.model.objects.all(),在前端已经一个一个的类数据循环
    :param admin_class: CustomerAdmin
    :return:对应字段的值
    """
    raw_ele = ""
    for index,column in enumerate(admin_class.list_display):
        #获取该类内指定字段的信息
        field_obj = obj._meta.get_field(column)
        if field_obj.choices:
            #获取字段choices里的中文值
            column_data = getattr(obj,"get_%s_display" %column)()
        else:
            column_data = getattr(obj,column)

        #print("type(column_date)类型:",column,type(column).__name__)
        if type(column_data).__name__ == 'datetime':
            column_data = column_data.strftime("%Y-%m-%d %H:%M:%S")

        if index==0:
            column_data = "<a href='{request_path}{colum_id}/change/'>{data}</a>".format(request_path=request.path,
                                                                                        colum_id=obj.id,
                                                                                        data=column_data)

        raw_ele += "<td>%s</td>" % column_data

1.4在view.py文件创建一个table_objs_change函数，返回table_objs_change.html页面

def table_objs_change(request,app_name,table_name,obj_id):
    """修改更新信息页面"""

        return render(request,"kindadmin/table_objs_change.html")

在url里面有几个值匹配，在view.py文件中的函数就得传几个函数变量不然后报错的

2、动态生成model,form

2、1 在kindadmin/forms.py 新建forms.py文件用来动态生成form,如下：

from django.forms import forms,ModelForm
from PerfectCRM.Perfectcrm.crm import models

def creat_model_form(request,admin_class):


    def __new__(cls,*args,**kwargs):
        #super(CustomerForm,self).__new__(*args,**kwargs)
        print("base fields",cls.base_fields)
        for field_name,field_obj in cls.base_fields.items():
            print(field_name,dir(field_obj))
            field_obj.widget.attrs['class'] = 'form-control'
            field_obj.widget.attrs['maxlength'] = getattr(field_obj,'max_length')if hasattr(field_obj,"max_length") else ''
        return ModelForm.__new__(cls)

    class Meta:
        model = admin_class.model
        fields = "__all__"

    attr = {"Meta":Meta}
    _model_form_class = type("DynamicModelForm",(ModelForm,),attr)

    return _model_form_class

from django.forms import forms,ModelForm
from PerfectCRM.Perfectcrm.crm import models

def creat_model_form(request,admin_class):

    class Meta:
        model = admin_class.model
        fields = "__all__"

    attr = {"Meta":Meta}
    _model_form_class = type("DynamicModelForm",(ModelForm,),attr)

    return _model_form_class

#上面的creat_model_form函数相当于：
#主要是因为type的关系：
#type 第一个函数：类名
#type 第二个函数：当前需要继承的基类记住他是元组(a,)
#type 第三个元素：类的成员，不管是函数还是类都可以

def creat_model_form(request,admin_class):
    class DynamicModelForm(ModelForm):
        class Meta:
            model = admin_class.model
            fields ="__all__"
　　return DynamicModelForm

2.2 在view.py文件引入自动生成的form，前端请求提交是用POST的请求方式在前端得加{% csrf_token %},点击进入更新页面是需要有之前新建的数据利用instance这个参数，前端如果后台更新报错，可以使用{{form_obj.errors}},在view.py文件的table_objs_change函数：

def table_objs_change(request,app_name,table_name,obj_id):
    """修改更新信息页面"""

    admin_class = kind_admin.enabled_admins[app_name][table_name]
    model_form_class = creat_model_form(request,admin_class)
    obj = admin_class.model.objects.get(id=obj_id)


    if request.method == "POST":
        form_obj = model_form_class(request.POST,instance=obj) #更新
        #判断更新的值是否合法
        if form_obj.is_valid():
            form_obj.save()
    else:
        form_obj = model_form_class(instance=obj)
    return render(request,"kindadmin/table_objs_change.html",{"form_obj":form_obj})

在前端可以判断如果字段是必填就加粗，其他的页面格式可以自己调调：

 {% for filed_form in form_obj%}
        <div class="form-group">
            <label class="col-sm-2 control-label" style="font-weight:normal">
                {% if filed_form.field.required%}
                    <b>{{filed_form.label}}</b>
                {% else %}
                    {{filed_form.label}}
                {% endif %}
            </label>
            <div class="col-sm-10">
              {#<input type="email" id="inputEmail3" placeholder="{{filed_form}}">#}
                {{filed_form}}
            </div>

3、增加新增数据页面

3、1 新建table_objs_add.html页面，继承table_objs_change.html页面，，在table_objs页面一个add ，点击这个add会进入table_objs_add.html页面

<a class="pull-right" href="{{request.path}}add/">Add</a>  #request.path表示当前路径

3、2  增加urls文件中的url:

    url(r'^(w+)/(w+)/add/$', views.table_objs_add, name='table_objs_add'),

3.3 在view.py文件中增加一个table_objs_add函数，新增就都是全新的不需要instance这个，新增成功之后需要重新返回到http://127.0.0.1:8000/kind_admin/crm/customer/页面

所以需要redirect重定向，request.path是当前没有参数的路径：

from django.shortcuts import render,redirect

def table_objs_add(request,app_name,table_name):
    """增加信息页面"""

    admin_class = kind_admin.enabled_admins[app_name][table_name]
    model_form_class = creat_model_form(request, admin_class)

    if request.method == 'POST':
        form_obj = model_form_class(request.POST) #新增
        if form_obj.is_valid():
            form_obj.save()
        return redirect(request.path.replace("/add/","/"))

    else:
        form_obj = model_form_class()


    return render(request,"kindadmin/table_objs_add.html",{"form_obj":form_obj})

3.4为了是页面一开始就是按某一个字段倒序显示：

def table_filter(request,admin_class):
    """进行条件过滤并返回过滤后的数据"""

    filter_conditions = {}
    for k,v in request.GET.items():
        kitem =['page','o','_q']
        if k in kitem:
            continue
        if v:
            filter_conditions[k]=v
    print("filter_conditions:",filter_conditions)
    print("admin_class.model.objects.filter(**filter_conditions)",admin_class.model.objects.filter(**filter_conditions))
    return admin_class.model.objects.filter(**filter_conditions).order_by("-%s"% admin_class.ordering if admin_class.ordering else "-id") 
        ,filter_conditions