unable to fetch value from html form to my python code

Question

I'm unable to fetch information from my html form to my python code. I checked the code many times but there doesn't seem to be a problem. Please check my code and tell me what's wrong. Thank you.

@app.route("/search",methods=["POST","GET"]) 
def search1():                                #python code
    var=request.form.get("search2")
    sear=str(var)
    print(var,sear)
    return " "
<html>                      <!--html code-->
<head>
    <title>hi there</title>
</head>
<body>
    <h1 style="font-family:verdana; font-style:italic;">Welcome to the book sea !!!....</h1>
    <form action="{{ url_for('search1') }}" method="get" align:"center">
        <input type="text" name="search2" placeholder="enter details">
        <button>search</button>
    </form>
    
</body>

you return, returns " " maybe you meant to use """ <html>... """. Does the above even run? Can you share logs? — urban
– urban, Commented Apr 19, 2020 at 9:40
app.route(....) is a decorator, So use @app.route(....). — Devansh Soni
– Devansh Soni, Commented Apr 19, 2020 at 9:47
You can refer to this code github.com/Shivamseth005/login_using_python_flask, check server.py in this github repository — Shivam Seth
– Shivam Seth, Commented Apr 19, 2020 at 9:53
@urban the above code ran perfectly, but instead of printing the value which i entered, it prints "none none". — stormcloak
– stormcloak, Commented Apr 19, 2020 at 11:00

Thaer A · Accepted Answer · 2020-04-19 10:30:41Z

1

Change the "get" in your HTML to "post". Because the way your Flask route is set up, it doesn't allow for a variable to be passed using a get request.

<form action="{{ url_for('search1') }}" method="get" align:"center">

to:

<form action="{{ url_for('search1') }}" method="post" align:"center">

Also you might want to remove or edit align:"center" because it's not proper html. Add it in style="" attribute or remove it.

Also:

Add a route to display the search form
Check if the request is a post method since you're accepting both get and post
You can use var=request.form["search2"] instead of var=request.form.get("search2")

===========================================

from flask import Flask, request, render_template

app = Flask(__name__)

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

@app.route("/search",methods=["POST","GET"])
def search1():                                #python code
    if request.method == 'POST':
        var=request.form["search2"]
        sear=str(var)
        print(var,sear)
    return " "

if __name__ == "__main__":
    app.run(debug=True)

==== search.html .. should be placed in the templates folder of your project ===

<html>                      <!--html code-->
<head>
    <title>hi there</title>
</head>
<body>
<h1 style="font-family:verdana; font-style:italic;">Welcome to the book sea !!!....</h1>
<form action="{{ url_for('search1') }}" method="post">
    <input type="text" name="search2" placeholder="enter details">
    <button>search</button>
</form>

</body>

</html>

edited Apr 19, 2020 at 10:30

answered Apr 19, 2020 at 9:56

Thaer A

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6 Comments

stormcloak Over a year ago

it didnt work, even after changing method to post it fetches nothing.

Thaer A Over a year ago

@stormcloak it should print out sear=str(var) print(var,sear) in your console.

stormcloak Over a year ago

it prints "none" in my console

Thaer A Over a year ago

@stormcloak I added the HTML. It's working fine on my end. Please update the question with your current code if it's still not working. Don't forget to create the templates folder and place search.html in it with the HTML code above.

stormcloak Over a year ago

after using var=request.form["search2"] it showed "400 bad request" error.

|

MimiEAM · Accepted Answer · 2020-05-04 23:21:26Z

0

the problem was solved by reinstalling the flask app. Thanks for your effort.

edited May 4, 2020 at 23:21

MimiEAM

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answered Apr 20, 2020 at 5:14

stormcloak

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