ModelForm和ModelFormSet的用法

ModelForm的用法:

 1 class GoodsModelForm(forms.ModelForm):
 2     """
 3     ModelForm
 4     """
 5     class Meta:
 6         model=models.Goods
 7         fields="__all__"
 8         # 错误消息
 9         error_messages={
10             'name':{'required':'不能为空'}
11         }
12         # 插件
13         widgets={
14             'source':forms.RadioSelect()
15         }
16     
17     # 定义class属性
18     def __init__(self,*args,**kwargs):
19         super().__init__(*args,**kwargs)
20         for name,filed in self.fields.items():
21             if name=='source':
22                 # 根据打印数据额类型找到源码去掉--------------
23                 from django.forms.models import ModelChoiceField
24                 filed.empty_label=None
25             else:
26                 filed.widget.attrs['class']='form-control

ModelFormSet的用法:

 1 def mult_add(request):
 2     """
 3     批量添加
 4     :param request:
 5     :return:
 6     """
 7     from  django.forms.models import modelformset_factory
 8     GoodsModelFormSet=modelformset_factory(model=models.Goods,form=GoodsModelForm,extra=3)
 9     if request.method=='GET':
10         form_set=GoodsModelFormSet()
11         return render(request, 'mult_add.html', {'form_set': form_set})
12     form_set=GoodsModelFormSet(data=request.POST)
13     if form_set.is_valid():
14         form_set.save()
15         return  redirect('/index/')
16     return render(request,'mult_add.html')

ModelFormSet

添加后端代码：

 1 def add(request):
 2     """
 3     添加
 4     :param request:
 5     :return:
 6     """
 7     if request.method=="GET":
 8         form=GoodsModelForm()
 9         return  render(request,'add.html',{'form':form})
10     form=GoodsModelForm(data=request.POST)
11     print(form)
12     if form.is_valid():
13         form.save()
14         return redirect('/index/')
15     return render(request, 'add.html', {'form': form})

add

添加前端代码：

 1 <link rel="stylesheet" href="https://cdn.bootcss.com/twitter-bootstrap/4.1.3/css/bootstrap.css">
 2 <div class="container">
 3     <h1>批量增加商品</h1>
 4     <form method="post">
 5         {% csrf_token %}
 6         {{ form_set.management_form }}
 7         <table class="table table-bordered table-hover">
 8             <thead>
 9             <tr>
10                 <th>商品名称</th>
11                 <th>价格</th>
12                 <th>来源</th>
13                 <th>分类</th>
14                 <th>库房</th>
15             </tr>
16             </thead>
17             <tbody>
18             {% for form in form_set %}
19                 <tr>
20                     {% for field in form %}
21                     <td>{{ field}} {{ field.errors.0}}</td>
22                     {% endfor %}
23                 </tr>
24             {% endfor %}
25             </tbody>
26         </table>
27         <input type="submit" value="提交">
28     </form>
29 </div>

add

修改后端代码：

 1 def update(request,nid):
 2     """
 3     修改
 4     :param request:
 5     :param nid:
 6     :return:
 7     """
 8     obj=models.Goods.objects.filter(id=nid).first()
 9     if request.method=="GET":
10         form=GoodsModelForm(instance=obj)
11         return  render(request,'update.html',{'form':form})
12     form=GoodsModelForm(data=request.POST,instance=obj)
13     if form.is_valid():
14         form.save()
15         return redirect('/index/')
16     return render(request, 'update.html', {'form': form})

update

修改前端代码：

 1 <div class="container">
 2     <h1>添加商品</h1>
 3     <form class="form-horizontal" method="post" novalidate>
 4         {% csrf_token %}
 5         {% for field in form %}
 6             <div class="form-group">
 7                 <label class="col-sm-2 control-label">{{ field.label }}</label>
 8                 <div class="col-sm-10">
 9                     {{ field }} <span style="color: red;">{{ field.errors.0 }}</span>
10                 </div>
11             </div>
12         {% endfor %}
13 
14         <div class="form-group">
15             <div class="col-sm-offset-2 col-sm-10">
16                 <input type="submit" class="btn btn-success" value="提 交">
17             </div>
18         </div>
19     </form>
20 
21 </div>

update