【django学习-24】自定义插件

• 1.ModelForm可以帮助我们生成HTML标签，这种是普通的标签

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

form = UserModelForm()

• 2.如果我们要使用bootstrap的标签，该怎么操作呢？
  • 2.1：自定义插件

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"}),
        }

• 2.2：上述方法，要对每个字段进行修改，不利于开发。如是，我们可以利用下面的方法批量修改

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
                }