Django中的Form一般有两种功能：

• 输入html
• 验证用户输入

目前配合bootstrap样式的Form和ModelForm模版示例

• 使用时只需引入继承即可

Python
from django import forms


class BootStrap:
    # 排除此列表中的BootStrap样式
    bootstrap_exclude_field = []

    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():
            if name in self.bootstrap_exclude_field:
                continue
            # 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 BootStrapModelForm(BootStrap, forms.ModelForm):
    pass


class BootStrapForm(BootStrap, forms.Form):
    pass

使用示例:

后端代码

Python
class AdminModelForm(BootStrapModelForm):
    confirm_password = forms.CharField(
        label="确认密码",
        widget=forms.PasswordInput(render_value=True)
    )

    class Meta:
        model = models.Admin
        fields = ["username", "phone", "email", 'password', "confirm_password", ]
        widgets = {
            # render_value=True 当提交密码保错的时不会清空
            "password": forms.PasswordInput(render_value=True)
        }

    def clean_password(self):
        pwd = self.cleaned_data.get("password")
        return md5(pwd)

    # 确认密码验证
    def clean_confirm_password(self):
        pwd = self.cleaned_data.get("password")
        confirm = md5(self.cleaned_data.get("confirm_password"))
        if confirm != pwd:
            raise ValidationError("密码不一致")
        # 返回什么，此字段以后保存到数据库就是什么。
        return confirm
 
 
 def admin_add(request):
    """ 添加管理员 """
    title = "新建管理员"
    if request.method == "GET":
        form = AdminModelForm()
        return render(request, 'change.html', {'form': form, "title": title})

    form = AdminModelForm(data=request.POST)
    if form.is_valid():
        form.save()
        return redirect('/admin/list/')

    return render(request, 'change.html', {'form': form, "title": title})

前端代码

html
{% extends 'layout.html' %}

{% block title %}{{ title }}{% endblock %}

{% block content %}

    <div class="container">
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title"> {{ title }} </h3>
            </div>
            <div class="panel-body">
                <form method="post" novalidate>
                    {% csrf_token %}

                    {% for field in form %}
                        <div class="form-group">
                            <label>{{ field.label }}</label>
                            {{ field }}
                            <span style="color: red;">{{ field.errors.0 }}</span>
                        </div>
                    {% endfor %}

                    <button type="submit" class="btn btn-primary">提 交</button>
                </form>
            </div>
        </div>
    </div>

{% endblock %}

表结构

Python
class Admin(models.Model):
    """ 管理员表 """
    username = models.CharField(verbose_name='用户名', max_length=32)
    password = models.CharField(verbose_name='密码', max_length=64)
    phone = models.CharField(verbose_name='手机号', max_length=32)
    email = models.CharField(verbose_name='邮箱', max_length=32)

    # 返回模型的字符串表示形式，即用户名
    # 当调用 str() 方法时，会返回管理员的用户名
    def __str__(self):
        return self.username