flask入门之表单的实现

{% extends 'common/base.html' %}
{% block title %}
  原生表单
{% endblock %}
{% block pagecontent %}
{#  <form action="{{ url_for('check') }}" method="post">#}
  <form action="{{ url_for('form') }}" method="post">
    <p>用户名: <input type="text" name="username" placeholder="请输入用户名" maxlength="12"></p>
    <p>密码： <input type="password" name="userpass" placeholder="请输入密码..."></p>
    <p><input type="submit" value="提交"></p>
  </form>
{% endblock %}

@app.route('/form/')
def form():
  return render_template('form1.html')

#接收表单的数据
@app.route('/check/',methods=['POST'])
def check():
  print(request.form)
  return '提交过来了'

@app.route('/form/',methods=['GET','POST'])
def form():
  if request.method == 'POST':
    print(request.form)
  return render_template('form1.html')

pip install flask-wtf

from flask import Flask,render_template,request
from flask_script import Manager
from flask_bootstrap import Bootstrap
#导入自定义表单类的基类
from flask_wtf import FlaskForm
#导入表单的字段
from wtforms import StringField,PasswordField,SubmitField
#导入验证器
from wtforms.validators import Length,DataRequired

app = Flask(__name__)
bootstrap = Bootstrap(app)
#加密种子 csrf需要使用
app.config['SECRET_KEY'] = 'abcdedff'
manager = Manager(app)

class Login(FlaskForm):
  username = StringField('用户名',validators=[Length(min=6,max=12,message='用户名的长度为6~12为'),DataRequired(message='用户名不能为空!!!')])
  userpass = PasswordField('密码',validators=[Length(min=6,max=12,message='用户名的长度为6~12为'),DataRequired(message='密码不能为空!!!')])
  submit = SubmitField('登录')

@app.route('/')
def index():
  return render_template('index.html')

@app.route('/form/',methods=['GET','POST'])
def form():
  #将表单类实例化
  form = Login()
  if request.method == 'POST':
    #验证是否存在正确的csrftoken和 数据的正确性 如果都正确则为真
    if form.validate_on_submit():
      # print(request.form)
      print(form.username.data)
  return render_template('form2.html',form=form)
from flask import Flask,render_template,request
from flask_script import Manager
from flask_bootstrap import Bootstrap
#导入自定义表单类的基类
from flask_wtf import FlaskForm
#导入表单的字段
from wtforms import StringField,PasswordField,SubmitField
#导入验证器
from wtforms.validators import Length,DataRequired


app = Flask(__name__)
bootstrap = Bootstrap(app)
#加密种子 csrf需要使用
app.config['SECRET_KEY'] = 'abcdedff'
manager = Manager(app)

class Login(FlaskForm):
  username = StringField('用户名',validators=[Length(min=6,max=12,message='用户名的长度为6~12为'),DataRequired(message='用户名不能为空!!!')])
  userpass = PasswordField('密码',validators=[Length(min=6,max=12,message='用户名的长度为6~12为'),DataRequired(message='密码不能为空!!!')])
  submit = SubmitField('登录')

@app.route('/')
def index():
  return render_template('index.html')

@app.route('/form/',methods=['GET','POST'])
def form():
  #将表单类实例化
  form = Login()
  if request.method == 'POST':
    #验证是否存在正确的csrftoken和 数据的正确性 如果都正确则为真
    if form.validate_on_submit():
      # print(request.form)
      print(form.username.data)
  return render_template('form2.html',form=form)

{% extends 'common/base.html' %}
{% block title %}
  原生表单
{% endblock %}
{% block pagecontent %}
  <form action="{{ url_for('form') }}" method="post">
    <p>{{ form.csrf_token }}</p>
    <p>{{ form.username.label() }} {{ form.username(style='color:red;',class='userclass',placeholder='请输入用户名') }}
      {% if form.errors%}
      <span style="color:red;">{{ form.errors.username.0 }}</span>
      {% endif %}
    </p>
    <p>{{ form.userpass.label() }} {{ form.userpass() }}</p>
    <p>{{ form.submit() }}</p>
  </form>
{% endblock %}

{% import 'bootstrap/wtf.html' as wtf %}
{% block pagecontent %}
  <div class="row">
    <div class="col-md-8">图片</div>
    <div class="col-md-4">{{ wtf.quick_form(form,action="",method="") }}
    </div>
  </div>
{% endblock %}

class Login(FlaskForm):
  ...
  def validate_username(self,field):
    # print(field)
    if field.data == 'zhangsan':
    # if self.username.data == 'zhangsan':
      raise ValidationError('该用户已存在')

class Login(FlaskForm):
  username = StringField('用户名',validators=[Length(min=6,max=12,message='用户名的长度为6~12为'),DataRequired(message='用户名不能为空!!!')])
  userpass = PasswordField('密码',validators=[Length(min=6,max=12,message='用户名的长度为6~12为'),DataRequired(message='密码不能为空!!!'),EqualTo('confirm',message='俩次密码输入不一致')])
  confirm = PasswordField('确认密码')
  info = TextAreaField('个人简介',validators=[Length(min=6,max=20,message='内容为6-20个长度'),DataRequired(message='内容不能为空')],render_kw={"style":"resize:none;",'placeholder':"请输入你此刻的感谢..."})
  hidde = HiddenField()
  birth = DateField('出生日期')
  birth = DateTimeField('出生日期')
  age = IntegerField('年龄',validators=[NumberRange(min=6,max=99,message='年龄为6~99岁')])
  money = FloatField()

  sex = RadioField(choices=[('w','女'),('m','男')])
  address = SelectField(choices=[('1001','北京'),('1002','上海'),('1003','天津')])

  file = FileField('文件上传')

  argee = BooleanField('请仔细阅读以上条款')

  ip = StringField('IPV4',validators=[IPAddress(message='请输入正确的ip地址')])
  url = StringField('url地址',validators=[URL(message='输入正确的url地址')])
  email = StringField('email',validators=[Email(message='请输入正确的邮箱地址')])
  preg = StringField('手机号码',validators=[Regexp('^[1][3-8][0-9]{9}$',flags=re.I,message='请输入正确的手机号码')])
  submit = SubmitField('登录')

from flask import flash,get_flashed_messages

class Login(FlaskForm):
  username = StringField('用户名',validators=[DataRequired(message='用户名不能为空')])
  userpass = PasswordField('密码',validators=[DataRequired(message='密码不能为空')])
  submit = SubmitField('登录')

@app.route('/form/',methods=['GET','POST'])
def form():
  form = Login()
  if form.validate_on_submit():
    if form.username.data == 'zhangsan' and form.userpass.data == '123456':
      flash('登录成功')
      return redirect(url_for('index'))
    else:
      flash('当前用户不存在')
  return render_template('user/login.html',form=form)

{% for message in get_flashed_messages() %}
  <div class="alert alert-danger" role="alert">{{ message }}</div>
{% endfor %}