wtforms
安裝:pip3 install wtforms
使用1(簡單版)：
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from flask import Flask, render_template, request, redirectfrom wtforms import Formfrom wtforms.fields import simplefrom wtforms import validatorsfrom wtforms import widgetsapp = Flask(__name__, template_folder='templates')app.debug = Trueclass LoginForm(Form): # 字段（內部包含正則表達式） name = simple.StringField( label='用戶名', validators=[ validators.DataRequired(message='用戶名不能為空.'), validators.Length(min=6, max=18, message='用戶名長度必須大于%(min)d且小于%(max)d') ], widget=widgets.TextInput(), # 頁面上顯示的插件 render_kw={'class': 'form-control'} ) # 字段（內部包含正則表達式） pwd = simple.PasswordField( label='密碼', validators=[ validators.DataRequired(message='密碼不能為空.'), validators.Length(min=8, message='用戶名長度必須大于%(min)d'), validators.Regexp(regex="^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!%*?&])[A-Za-z\d$@$!%*?&]{8,}", message='密碼至少8個字符，至少1個大寫字母，1個小寫字母，1個數字和1個特殊字符') ], widget=widgets.PasswordInput(), render_kw={'class': 'form-control'} )@app.route('/login', methods=['GET', 'POST'])def login(): if request.method == 'GET': form = LoginForm() return render_template('login.html', form=form) else: form = LoginForm(formdata=request.form) if form.validate(): print('用戶提交數據通過格式驗證，提交的值為：', form.data) else: print(form.errors) return render_template('login.html', form=form)if __name__ == '__main__': app.run() |
login.html
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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body><h1>登錄</h1><form method="post"> <p>{{form.name.label}} {{form.name}} {{form.name.errors[0] }}</p> <p>{{form.pwd.label}} {{form.pwd}} {{form.pwd.errors[0] }}</p> <input type="submit" value="提交"></form></body></html> |
使用2(復雜版)：
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from flask import Flask, render_template, request, redirectfrom wtforms import Formfrom wtforms.fields import corefrom wtforms.fields import html5from wtforms.fields import simplefrom wtforms import validatorsfrom wtforms import widgetsapp = Flask(__name__, template_folder='templates')app.debug = Trueclass RegisterForm(Form): name = simple.StringField( label='用戶名', validators=[ validators.DataRequired() ], widget=widgets.TextInput(), render_kw={'class': 'form-control'}, default='alex' ) pwd = simple.PasswordField( label='密碼', validators=[ validators.DataRequired(message='密碼不能為空.') ], widget=widgets.PasswordInput(), render_kw={'class': 'form-control'} ) pwd_confirm = simple.PasswordField( label='重復密碼', validators=[ validators.DataRequired(message='重復密碼不能為空.'), validators.EqualTo('pwd', message="兩次密碼輸入不一致") # EqualTo也可以做密碼驗證 ], widget=widgets.PasswordInput(), render_kw={'class': 'form-control'} ) email = html5.EmailField( label='郵箱', validators=[ validators.DataRequired(message='郵箱不能為空.'), validators.Email(message='郵箱格式錯誤') ], widget=widgets.TextInput(input_type='email'), render_kw={'class': 'form-control'} ) gender = core.RadioField( label='性別', choices=( (1, '男'), (2, '女'), ), coerce=int # “1” “2” ) city = core.SelectField( label='城市', choices=( ('bj', '北京'), ('sh', '上海'), ) ) hobby = core.SelectMultipleField( label='愛好', choices=( (1, '籃球'), (2, '足球'), ), coerce=int ) favor = core.SelectMultipleField( label='喜好', choices=( (1, '籃球'), (2, '足球'), ), widget=widgets.ListWidget(prefix_label=False), option_widget=widgets.CheckboxInput(), coerce=int, default=[1, 2] ) def __init__(self, *args, **kwargs): super(RegisterForm, self).__init__(*args, **kwargs) self.favor.choices = ((1, '籃球'), (2, '足球'), (3, '羽毛球')) def validate_pwd_confirm(self, field): """ 自定義pwd_confirm字段規則，例：與pwd字段是否一致 :param field: :return: """ # 最開始初始化時，self.data中已經有所有的值 if field.data != self.data['pwd']: # raise validators.ValidationError("密碼不一致") # 繼續后續驗證 raise validators.StopValidation("密碼不一致") # 不再繼續后續驗證@app.route('/register', methods=['GET', 'POST'])def register(): if request.method == 'GET': form = RegisterForm(data={'gender': 2,'hobby':[1,]}) # initial return render_template('register.html', form=form) else: form = RegisterForm(formdata=request.form) if form.validate(): print('用戶提交數據通過格式驗證，提交的值為：', form.data) else: print(form.errors) return render_template('register.html', form=form)if __name__ == '__main__': app.run() |
register.html
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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body><h1>用戶注冊</h1><form method="post" novalidate style="padding:0 50px"> {% for field in form %} <p>{{field.label}}: {{field}} {{field.errors[0] }}</p> {% endfor %} <input type="submit" value="提交"></form></body></html> |
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原文鏈接：https://www.cnblogs.com/guyouyin123/p/12541465.html
