Django框架form表单的那些事儿

Form那些事儿

创建Form类时，主要涉及到 【字段】 和 【插件】，字段用于对用户请求数据的验证，插件用于自动生成HTML;

1:initial

初始值，input框里面的初始值。

class LoginForm(forms.Form):
    username = forms.CharField(
        min_length=8,
        label="用户名",
        initial="张三"  # 设置默认值
    )
    pwd = forms.CharField(min_length=6, label="密码")

2:error_messages

返回的错误信息

class LoginForm(forms.Form):
    username = forms.CharField(
        min_length=8,
        label="用户名",
        initial="张三",
        error_messages={
            "required": "不能为空",         //返回的错误信息
            "invalid": "格式错误",
            "min_length": "用户名最短8位"
        }
    )
    pwd = forms.CharField(min_length=6, label="密码")

3:password

class LoginForm(forms.Form):
    ...
    pwd = forms.CharField(
        min_length=6,
        label="密码",           //密码框是不可见的 要使用   PasswordInput

　　　　　　widget=forms.widgets.PasswordInput(attrs={'class': 'c1'}, render_value=True) )

4:radioSelect

class LoginForm(forms.Form):
    username = forms.CharField(
        min_length=8,
        label="用户名",
        initial="张三",
        error_messages={
            "required": "不能为空",
            "invalid": "格式错误",
            "min_length": "用户名最短8位"
        }
    )
    pwd = forms.CharField(min_length=6, label="密码")
    gender = forms.fields.ChoiceField(
        choices=((1, "男"), (2, "女"), (3, "保密")),
        label="性别",
        initial=3,           // radio 单选框使用RadioSelect方法产生
        widget=forms.widgets.RadioSelect()
    )

5:单选Select

class LoginForm(forms.Form):
    ...
    hobby = forms.fields.ChoiceField(
        choices=((1, "篮球"), (2, "足球"), (3, "双色球"), ),
        label="爱好",
        initial=3,　　　　　　// select 单选框使用 Select方法
        widget=forms.widgets.Select()
    )

6:多选Select

class LoginForm(forms.Form):
    ...
    hobby = forms.fields.MultipleChoiceField(
        choices=((1, "篮球"), (2, "足球"), (3, "双色球"), ),
        label="爱好",
        initial=[1, 3],      // 多选的select 使用的是 SelectMultiple

widget=forms.widgets.SelectMultiple() )

7:单选checkbox

class LoginForm(forms.Form):
    ...
    keep = forms.fields.ChoiceField(
        label="是否记住密码",
        initial="checked",        // 只有一个 CheckBox
        widget=forms.widgets.CheckboxInput()
    )

8:多选checkbox

class LoginForm(forms.Form):
    ...
    hobby = forms.fields.MultipleChoiceField(
        choices=((1, "篮球"), (2, "足球"), (3, "双色球"),),
        label="爱好",
        initial=[1, 3],           // 多个checkbox 要使用checkboxSelectMultiple
        widget=forms.widgets.CheckboxSelectMultiple()
    )

校验

关于手机号码的校验

from django.forms import Form
from django.forms import widgets
from django.forms import fields
from django.core.validators import RegexValidator    // 需要导入的模块

class MyForm(Form):
    user = fields.CharField(
        validators=[RegexValidator(r'^[0-9]+$', '请输入数字'), RegexValidator(r'^1[3-9][0-9]{9}+$', '数字必须以13到19开头')],
    )