Django学习笔记012-ModelForm和BootStrap

####1、ModelFrom可以自动生成HTML标签
1.1 自动生成ID,格式为ID_

models.py
 create_time = models.DateField(verbose_name='入职时间')

HTML
id="id_create_time"

• ModelForm可以帮助我们生成HTML标签。

  class UserModelForm(forms.ModelForm):
      class Meta:
          model = models.UserInfo
          fields = ["name", "password",]
  
  form = UserModelForm()

  {{form.name}}      普通的input框
  {{form.password}}  普通的input框

• 定义插件

  class UserModelForm(forms.ModelForm):
      class Meta:
          model = models.UserInfo
          fields = ["name", "password",]
          widgets = {
              "name": forms.TextInput(attrs={"class": "form-control"}),
              "password": forms.PasswordInput(attrs={"class": "form-control"}),
              "age": forms.TextInput(attrs={"class": "form-control"}),
          }

  class UserModelForm(forms.ModelForm):
      name = forms.CharField(
          min_length=3,
          label="用户名",
          widget=forms.TextInput(attrs={"class": "form-control"})
      )
  
      class Meta:
          model = models.UserInfo
          fields = ["name", "password", "age"]

  {{form.name}}      BootStrap的input框
  {{form.password}}  BootStrap的input框

• 重新定义的init方法，批量设置

  class UserModelForm(forms.ModelForm):
      class Meta:
          model = models.UserInfo
          fields = ["name", "password", "age",]
  
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
          
          # 循环ModelForm中的所有字段，给每个字段的插件设置
          for name, field in self.fields.items():
              field.widget.attrs = {
                  "class": "form-control", 
                  "placeholder": field.label
              }

  class UserModelForm(forms.ModelForm):
      class Meta:
          model = models.UserInfo
          fields = ["name", "password", "age",]
  
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
          
          # 循环ModelForm中的所有字段，给每个字段的插件设置
          for name, field in self.fields.items():
              # 字段中有属性，保留原来的属性，没有属性，才增加。
              if field.widget.attrs:
                  field.widget.attrs["class"] = "form-control"
                  field.widget.attrs["placeholder"] = field.label
              else:
                  field.widget.attrs = {
                      "class": "form-control", 
                      "placeholder": field.label
                  }

  class UserEditModelForm(forms.ModelForm):
      class Meta:
          model = models.UserInfo
          fields = ["name", "password", "age",]
  
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
          
          # 循环ModelForm中的所有字段，给每个字段的插件设置
          for name, field in self.fields.items():
              # 字段中有属性，保留原来的属性，没有属性，才增加。
              if field.widget.attrs:
                  field.widget.attrs["class"] = "form-control"
                  field.widget.attrs["placeholder"] = field.label
              else:
                  field.widget.attrs = {
                      "class": "form-control", 
                      "placeholder": field.label
                  }

• 自定义类

  class BootStrapModelForm(forms.ModelForm):
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
          # 循环ModelForm中的所有字段，给每个字段的插件设置
          for name, field in self.fields.items():
              # 字段中有属性，保留原来的属性，没有属性，才增加。
              if field.widget.attrs:
                  field.widget.attrs["class"] = "form-control"
                  field.widget.attrs["placeholder"] = field.label
              else:
                  field.widget.attrs = {
                      "class": "form-control", 
                      "placeholder": field.label
                  }

  class UserEditModelForm(BootStrapModelForm):
      class Meta:
          model = models.UserInfo
          fields = ["name", "password", "age",]