I can't get an input field in a form to send a value to the server. (I'm using flask + python on Google App Engine).
Please excuse me if this is a rookie question...
Part of my html template file:
<form class="form-inline" action="/rm_list" method="POST">
<div class="row" >
<div class="col-span-6">
<fieldset>
<input class="form-control form-control-lg" type="text" name="searchtext" placeholder="Product...">
<input name="text1">
<button class="btn btn-primary" type="submit"><i class="material-icons w3-text-black" >search</i></button>
</div>
...
...
some radio buttons
So I dumped the POST data to the terminal to debug:
my_data = request.form
for key in my_data:
print ('form key '+key+" "+my_data[key])
After trying different solutions, I found that the culprit is the type="text" attribute.
I could see the value of the simple text1 input, but the value from the searchtext input just wasn't in the received data :-(
If I remove "type="text" as follows:
<input class="form-control form-control-lg" name="searchtext" Placeholder="Product...">
then the searchtext field is received Ok by the server.
Any ideas what I'm doing wrong?
Thanks!
It seems to me that your field is simply missing the value attribute. – Anonymous
Related
Intro: I can receive the values from input fields in Flask by
var = request.form['description']
and the following HTML:
<form method="post" enctype="multipart/form-data">
<div class="mb-3">
<label for="description">Beschreibung</label>
<textarea name="description" placeholder="Post description"
class="form-control"></textarea>
</div>
<div class="form-group">
<button type="submit" class="btn btn-primary">Submit</button>
</div>
</form>
Question: Any idea how to handle a tag field, like e.g. Link , together with Flask Form? How to handle Flask Form and $.Ajax Post request simultaneously? Any hint would be highly appriciated. I did my research but found nothing online.
I found now an easy solution for me. Don´t know if it is very clean but what I did was basically create a hidden field and pass the var from JS to the hidden field inside <form so that i can grab it with request in Flask. I also did this the other way around, passing the variable from Flask to JS. In this way I can use the CSS,JS in the link above outside of <form, i.e. I can press Enter
HTML:
<!-- from JS to Flask -->
<input type="hidden" name="hidden_tags" id="hidden_tags" value="" />
<!-- from Flask to JS -->
<input type="hidden" name="hidden_tags2" id="hidden_tags2" value="{{ post['tags'] }}"/>
in JS:
tags = document.getElementById("hidden_tags2").value.split('/');
document.getElementById("hidden_tags").value = tags
in Flask:
request.form['hidden_tags']
I am trying to capture HTTP form data using Python and Flask, but I keep getting "method not allowed" error. I have been trying to figure out why for some time with no luck. Here is what my code looks like:
#app.route("/add_recipe")
def addrecipepage():
if request.method=="post":
print ("Successful post request") # Just testing if code is working so far
return render_template("add_recipe.html")
and the HTML code:
<form id="contact" action="browseAll" method="post">
<div class="row">
<div class="col-md-6">
<fieldset>
<input name="name" type="text" class="form-control" id="name" placeholder="Recipe Name..." required="">
</fieldset>
<div class="col-12">
<textarea name="demo-message" id="recipeText" placeholder="Enter Ingredients & Instructions Here" rows="15"></textarea>
</div>
<div class="col-md-12">
<button type="submit" id="form-submit" class="button">Add The Recipe!</button>
<button id="uploadPhotoButton">Upload A Photo!</button>
</div>
</form>
When I click on the submit button, I get a HTTP 405 Method Not Allowed error. Anybody have any ideas as to why after looking at this? "browseAll" is another HTML page that I created an endpoint for in my app.py file. The same error gets thrown even if I don't specify an action though.
You are doing a POST (your form has method = "post") but your route does not have a post method attached to it. When you define a route without attaching a method, it defaults to GET. You need to do this
#app.route("/add_recipe", methods =['GET', 'POST'])
So, last few days I was trying to build a website where you input the post data then hit submit and then boom your post appears on the home page/post page.
So, I have created the form but the problem is that I don't know how to send HTML form data to SQLite database so it can be viewed by multiple users anytime.
<form class="posts" action="." method="post">
<h2>Title</h2>
<input type="text" name="title" placeholder="Title">
<h2>Description</h2>
<textarea input class="des" name="description"type="text" placeholder="Description"></textarea>
<h2>Image(Optional)</h2>
<input type="file" name="inpFile" id="inpFile" class="img-btn">
<div class="img-prev" id="imgPrev">
<img src="" alt="Image Preview" class="img-prev__img">
<span class="img-prev__def-text">Image Preview</span>
</div>
<input type="submit" value="Submit">
</form>
I think that you should take a look at some Python's web-frameworks like Flask or Django first, so that you can understand this subject a little clearer.
Getting a 400, when trying to upload a file ad send other form elements to flask from html. Tried to use ajax, but that throws me an error as well.
Python:
#app.route('/prod_diff_result', methods=['POST', 'GET'])
def prod_diff_result():
try:
host = request.form['host-prod-iterator']
print(host)
if request.files['file']:
f = request.files['file']
f.save(secure_filename(f.filename))
HTML:
<div class="main-div">
<form action="/prod_diff_result" method="POST" enctype="multipart/form-data">
<div class="grid-container">
<div class="grid-item">
<span class="label label-default ">PROD</span><br>
<p>Iterator Host : <input type="text" class="form-control" id="host-prod-iterator" value="10.47.7.57"
required></p>
<input type="radio" name="data_fetch_type" value="file" onclick="showfile()">Upload File
<input type="file" name="file" />
<input type="radio" name="data_fetch_type" value="db"> Get from DB
<input type="submit" />
</div>
</form>
</div>
I want to be able send hostname and file back to flask error in one request and using one form.
It gives an error because you try to access a form field that it cannot find, and assumes that somehow the request was bad, because it didn't include a required form field. You are trying to access:
host = request.form['host-prod-iterator']
However you have simply not given it a name in your HTML. If you give it a name, it should work:
<p>Iterator Host :
<input type="text" class="form-control" name="host-prod-iterator" id="host-prod-iterator" value="10.47.7.57" required>
</p>
I am attempting to return data from a HTML form with a POST request using Flask. For some reason I get a 400 Bad Request error. Looking at Chrome Dev Tools, I can see that all of the form fields with the input tag are part of the post request. The select tag with the dropwdown list is not being captured and I think this is creating the error. Anyone know why the select tag is not being captured in the post request? Any help much appreciated.
Here is the HTML form:
<label for="vendor">Select Vendor</label>
<div class="flextable p-b" style="padd">
<div class="flextable-item">
<select class="selectpicker" data-live-search="true" form="addInvoice" name="vendor" id="vendor">
<option>Jack Jaffa & Associates</option>
<option>Jacobs/Doland/Beer LLC</option>
<option>Jenkins & Huntington Inc.</option>
<option>Joseph J. Blake & Associates, Inc.</option>
<option>Langan (Geotechnical)</option>
<option>Madison Realty Capital</option>
<option>McNamara Salvia, Inc</option>
<option>Metropolis Group, Inc</option>
<option>National Grid</option>
</select>
</div>
<div class="flextable-item">
<button type="button" class="btn btn-xs btn-primary-outline">Add vendor</button>
</div>
<label for="invoice_number">Invoice Number:</label>
<input type="text" class="form-control p-b" placeholder="Every vendor invoice # must be unique" name="invoice_number" id="invoice_number">
<label for="invoice_amount">Amount:</label>
<input type="text" class="form-control p-b" placeholder="$0.00" name="invoice_amount" id="invoice_amount">
<label for="invoice_amount">Description:</label>
<input type="text" class="form-control p-b" placeholder="$0.00" width="100%" name="description" id="description">
<div class="spacer"></div>
<div class="flextable">
<div class="flextable-item">
<label for="date_received">Date received:</label>
</div>
<div>
<div class="flextable-item">
<div class="input-group">
<span class="input-group-addon">
<span class="icon icon-calendar"></span>
</span>
<input type="text" value="01/01/2015" class="form-control" data-provide="datepicker" style="width: 200px;" name="date_received" id="date_received">
</div>
</div>
</div>
</div>
</div>
<div class="modal-actions p-t-lg">
<button type="button" class="btn-link modal-action" data-dismiss="modal">Cancel</button>
<button type="submit" class="btn-link modal-action" id="submit" >
<strong>Save + Continue</strong>
</button>
</div>
</form>
Here is the Flask python route:
#app.route('/add_invoice', methods=['GET', 'POST'])
def add_invoice():
""" Method for capturing form data to add invoice items to database"""
if request.method == 'POST':
find_cost_code = 7777 # eventually need code to lookup cost-code from POST request
print request.form['invoice_number']
print request.form['invoice_amount']
print request.form['description']
print request.form['vendor']
print request.form['date_received']
return "This is a test"
ADDED INFO:
So if I remove this line, the bad request error goes away:
print request.form['vendor']
This is because the "vendor" field is the only one in the html form that uses a select tag for input and that data is not catpured in the post request dictionary (which i can see in Chrome Dev Tool). The POST request is missing the field associated with the select tag. Not sure how to capture the select tag in the form data...
I've faced this issue many time when dealing with flask form, I think the solution is to enable csrf token protection :
according to this you need to initialise and enable it for you app!
Most of time error 400 is due to missing CSRF token.
you can do it as :
from flask_wtf.csrf import CSRFProtect
csrf = CSRFProtect(app)
for initialisation
and in your form add:
<input type="hidden" name="csrf_token" value="{{ csrf_token() }}"/>
hope it will help!!
feel free to edit.
form="addInvoice"
This attribute as part of my HTML form markup was what caused the error. I'm not sure exactly why but when it is removed, the error goes away.
(Thanks for your help above in trying to look into this.)
You need getlist to capture select.