Question

<块引用>

我是 Flask 的新手，我一直在尝试制作一个应用程序来处理输入，例如：身高、体重、性别、年龄和腰围，以便稍后输出一些身体参数

html 页面

{% extends "bootstrap/base.html" %}
{% block content %}
<html>
<head>
    <title>Workout calculator</title>
    <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}">
</head>
<body>
    <form action="{{ url_for('routes.py') }}" method = "POST"> 
        {{ form.csrf_token }}
        <div class="wrapper">

            <div class="title">
                Workout calculator
            </div>

            <div class="form">
                <div class="gender"> 
                    <label for="men">Men</label>
                    {{ form.sex }}
                    <label for="women">Women</label>
                    {{ form.sex }}
                </div>
                
                <div class="input_field">
                    <label for="height">Height</label>
                    {{ form.height }}
                    <select id="height">
                        <option value="cm">cm</option>
                        <option value="ft">ft</option>
                    </select>
                </div>
            
                <div class="input_field">
                    <label for="weight">Weight</label>
                    {{ form.weight }}
                    <select id="weight">
                        <option value="kg">kg</option>
                        <option value="lbs">lbs</option>
                    </select>
                </div>

                <div class="input_field">
                    <label for="age">Age</label>
                    {{ form.age }}
                </div>

                <div class="input_field">
                    <label for="waist">Waist</label>
                    {{ form.waist }}
                    <select id="waist">
                        <option value="cm">cm</option>
                        <option value="ft">ft</option>
                    </select>
                </div>
            </div>
            
            <div class="input_field">
                {{ form.submit(class="calculate") }}
            </div>
        </div>
    </form>

    <body>
        <div class="results">
            <div class="BMI">
                <p>BMI (Body Mass Index): {{ BMI }} %</p>
            </div>
            <div class="Body fat">
                <p>BFP (Body Fat Percentage): {{ BFP }} %</p>
            </div>
            <div class="Lean body mass">
                <p>LBM (Lean body mass): {{ LBM }} %</p>
            </div>
            <div class="Waist / height ratio">
                <p>BMR (Basal Metabolic Rate): {{ BMR }} %</p>
            </div>
        </div>
    </body>

</body>
</html>
{% endblock content %}

routes.py

@app.route('/', methods = ['GET','POST'])
def index():

    calc_form = InputData()

    parameters = HealthBoard.body_calculator

    height = float(request.form['height'])
    weight = float(request.form['weight'])
    age = float(request.form['age'])
    sex = float(request.form['sex'])
    waist = float(request.form['waist'])

    body_params = parameters.Parameters(height, weight, age, sex, waist)

    LBM = body_params.Lean_Body_Mass()
    BMR = body_params.Basal_Metabolic_Rate()
    BMI = body_params.Body_Mass_Index()
    BFP = body_params.Body_Fat_Percentage()
    
        
    context = {
        'LBM' : LBM,
        'BMR' : BMR,
        'BMI' : BMI,
        'BFP' : BFP,
        'form': calc_form
        }


    if request.method == 'POST' and calc_form.validate_on_submit():   
        flash('It worked')
           

    return render_template('index.html', **context)

forms.py

from flask_wtf import Form
from wtforms.fields import IntegerField, BooleanField, SubmitField
from wtforms.validators import DataRequired, InputRequired, ValidationError

class InputData(Form):

    height = IntegerField('height', validators=[DataRequired()])
    weight = IntegerField('weight', validators=[DataRequired(), InputRequired()])
    age = IntegerField('age',validators=[DataRequired(), InputRequired()])
    waist = IntegerField('waist', validators=[DataRequired(), InputRequired()])
    sex = BooleanField('sex', validators=[])

    submit = SubmitField('Submit')

我试过不使用 FlaskWTF 并且效果很好，但是当我使用它时出现此错误。

我尝试使用 return.form.get('') 并返回此错误

<块引用>

TypeError: 不支持的操作数类型 *: 'NoneType' 和 'int'

400 Bad Request：浏览器（或代理）发送了一个该服务器无法理解的请求。关键错误：'高度'

0 个答案: