我的 Flask 应用程序根据用户表单输入进行计算。这些计算大约需要 10 秒才能完成。这些计算的输出需要显示在同一页面上的 div 中,在表单旁边(在图表/表格等中)。
我尝试了两种方法。第一个,使用普通的 Flask,重新加载整个页面,这远非理想。第二种方法,使用 Sijax,只更新 div。但在这种情况下,我不知道如何访问表单输入。
我很困惑如何让这个工作。将不胜感激任何方向!
方法1:只是烧瓶(缺点:整个页面重新加载)
form_test.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Testpage</title>
</head>
<body>
<form action="{{ url_for('do_the_math') }}" method="post">
A = <input type="number" name="input_A">
B = <input type="number" name="input_B">
<input type="submit" value="Submit">
</form>
<div id="destination_div">A + B = {{ result }}</div>
</body>
</html>
app_normal.py:
from flask import Flask, render_template, request
app = Flask(__name__)
@app.route("/")
def show_home():
return render_template("form_test.html", result='unknown yet')
@app.route("/do_the_math", methods=['POST'])
def do_the_math():
A = request.form.get('input_A')
B = request.form.get('input_B')
sum = float(A) + float(B)
# reloads whole page
return render_template("form_test.html", result=sum)
# what i want: reload just update destination_div with new HTML
# return render_template("#destination_div", "A + B = " + str(sum))
if __name__ == '__main__':
app.run(debug=True)
方法 2:使用 Sijax(更新 div,但如何访问表单输入?)
form_test_sijax.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Testpage with sijax</title>
<script type="text/javascript" src="/static/js/sijax/sijax.js"></script>
<script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
</head>
<body>
<form method="post">
A = <input type="number" name="input_A">
B = <input type="number" name="input_B">
<button type="button" onclick="Sijax.request('submit_form');">calc</button>
</form>
<div id="destination_div">A + B = unknown</div>
</body>
</html>
app_sijax.py
from flask import Flask, render_template, g
import flask_sijax
import os
app = Flask(__name__)
# init sijax
app.config["SIJAX_STATIC_PATH"] = os.path.join('.', os.path.dirname(__file__), 'static/js/sijax/')
app.config["SIJAX_JSON_URI"] = '/static/js/sijax/json2.js'
flask_sijax.Sijax(app)
def submit_form_handler(obj_response):
A = 5 # how do get to the values entered in the form?
B = 3
sum = A + B
obj_response.html("#destination_div", "A + B = " + str(sum))
@flask_sijax.route(app, "/")
def show_home():
result = 'unknown'
if g.sijax.is_sijax_request:
g.sijax.register_callback('submit_form', submit_form_handler)
return g.sijax.process_request()
return render_template("form_test_sijax.html")
if __name__ == '__main__':
app.run(debug=True)