How to submit Form using Ajax in Django

I need to submit an HTML Form using an Ajax call. I don't know why nothing is happening on clicking the button (Upload Files), I checked the browser console but no error.

Here is the code

index.html
https://dpaste.de/2yO4

views.py
https://dpaste.de/rMQm

Complete code
https://www.dropbox.com/sh/2pq1x6tet7td4jq/AAB-l42AQg1w22RRRG-4AUQna?dl=0

/r/django
https://redd.it/8b5pv5

Heroku Django application error!

Hey guys i have created my first django website! and i want to upload it through Heroku, So i followed everything they said to me and i am still getting application error wheni am trying to do
heruko open
I get an application error and as i am beginner to heruko i am frustrated to get errors! I found that i am getting error here while i do
git push heruko master
I get all things ready but a small error after deploying is done and the error is:

Counting objects: 30, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (30/30), done.
Writing objects: 100% (30/30), 13.62 KiB | 422.00 KiB/s, done.
Total 30 (delta 2), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Python app detected
remote: -----> Installing pip
remote: -----> Installing requirements with pip
remote:
remote: -----> $ python manage.py collectstatic --noinput
remote: 118 static files copied to
'/tmp/build_d2ad5fb0675c6c8305a3ad0fb5
819fe4/static', 131 post-processed.
remote:
remote: -----> Discovering process types
remote: Procfile declares types -> (none)
remote:
remote: -----> Compressing...
remote: Done: 54.3M
remote: -----> Launching...
remote: Released v9
remote: https://kiran-portfolio.herokuapp.com/ deployed to Heroku
remote:
remote: Verifying deploy... done.
To https://git.heroku.com/kiran-portfolio.git
dd0eec5..f9d7b19 master -> master
error: update_ref failed for ref 'refs/remotes/heroku/master': cannot lock ref '
refs/remotes/heroku/master': unable to resolve reference
'refs/remotes/heroku/ma
ster': reference broken

I also think the error is with the Procfile because i don't know what name we should type in the wsgi.py as given below:
web: guincorn whatnameshouldiwrite.wsgi

I found that we should write our app name but i have two apps in my project and i have different name for my heroku website and a different name for my project on my PC so which name should i write there?

The heroku logs looks like:

2018-04-10T08:14:54.924974+00:00 app[api]: Enable Logplex by user smschavan143@g
mail.com
2018-04-10T08:14:54.924974+00:00 app[api]: Release v2 created by user smschavan1
43@gmail.com
2018-04-10T08:14:54.816584+00:00 app[api]: Release v1 created by user smschavan1
43@gmail.com
2018-04-10T08:14:54.816584+00:00 app[api]: Initial release by user smschavan143@
gmail.com
2018-04-10T08:15:27.492135+00:00 heroku[router]: at=info code=H81 desc="Blank ap
p" method=GET path="/" host=kiran-portfolio.herokuapp.com request_id=fc6bbee0-4c
46-4896-b597-07c430591135 fwd="45.117.31.196" dyno= connect= service= status=502
bytes= protocol=https
2018-04-10T08:15:31.386132+00:00 heroku[router]: at=info code=H81 desc="Blank ap
p" method=GET path="/favicon.ico" host=kiran-portfolio.herokuapp.com request_id=
daa19840-978e-46f1-9e69-4c031feecdcb fwd="45.117.31.196" dyno= connect= service=
status=502 bytes= protocol=https
2018-04-10T08:28:39.000000+00:00 app[api]: Build started by user smschavan143@gm
ail.com
2018-04-10T08:28:39.000000+00:00 app[api]: Build failed -- check your build logs

2018-04-10T08:29:48.000000+00:00 app[api]: Build started by user smschavan143@gm
ail.com
2018-04-10T08:29:48.000000+00:00 app[api]: Build failed -- check your build logs

2018-04-10T08:30:26.000000+00:00 app[api]: Build started by user smschavan143@gm
ail.com
2018-04-10T08:30:26.000000+00:00 app[api]: Build failed -- check your build logs

2018-04-10T08:31:52.000000+00:00 app[api]: Build started by user smschavan143@gm
ail.com
2018-04-10T08:31:52.000000+00:00 app[api]: Build failed -- check your build logs

2018-04-10T08:34:55.000000+00:00 app[api]: Build started by user smschavan143@gm
ail.com
2018-04-10T08:34:55.000000+00:00 app[api]: Build failed -- check your build logs

2018-04-10T08:41:23.000000+00:00 app[api]: Build started by user smschavan143@gm
ail.com
2018-04-10T08:41:50.953604+00:00 app[api]: Attach DATABASE (@ref:postgresql-ae

ro
dynamic-33012) by user smschavan143@gmail.com
2018-04-10T08:41:50.953604+00:00 app[api]: Release v3 created by user smschavan1
43@gmail.com
2018-04-10T08:41:51.193509+00:00 app[api]: Deploy 76360db4 by user smschavan143@
gmail.com
2018-04-10T08:41:51.193509+00:00 app[api]: Release v4 created by user smschavan1
43@gmail.com
2018-04-10T08:41:23.000000+00:00 app[api]: Build succeeded
2018-04-10T08:51:00.000000+00:00 app[api]: Build started by user smschavan143@gm
ail.com
2018-04-10T08:51:00.000000+00:00 app[api]: Build failed -- check your build logs

2018-04-10T08:52:35.000000+00:00 app[api]: Build started by user smschavan143@gm
ail.com
2018-04-10T08:53:00.830250+00:00 app[api]: Deploy 3885895d by user smschavan143@
gmail.com
2018-04-10T08:53:00.830250+00:00 app[api]: Release v5 created by user smschavan1
43@gmail.com
2018-04-10T08:52:35.000000+00:00 app[api]: Build succeeded
2018-04-10T08:59:46.000000+00:00 app[api]: Build started by user smschavan143@gm
ail.com
2018-04-10T09:00:10.571878+00:00 app[api]: Release v6 created by user smschavan1
43@gmail.com
2018-04-10T09:00:10.571878+00:00 app[api]: Deploy bbae6e49 by user smschavan143@
gmail.com
2018-04-10T08:59:46.000000+00:00 app[api]: Build succeeded
2018-04-10T09:00:48.993535+00:00 heroku[router]: at=error code=H14 desc="No web
processes running" method=GET path="/" host=kiran-portfolio.herokuapp.com reques
t_id=c3052a19-a59a-4cef-8265-4703bd1557ea fwd="45.117.31.196" dyno= connect= ser
vice= status=503 bytes= protocol=https
2018-04-10T09:00:52.766072+00:00 heroku[router]: at=error code=H14 desc="No web
processes running" method=GET path="/favicon.ico" host=kiran-portfolio.herokuapp
.com request_id=19bda5bc-fcc4-4bb8-9f14-2f4d52a2b0e0 fwd="45.117.31.196" dyno= c
onnect= service= status=503 bytes= protocol=https
2018-04-10T09:08:35.655039+00:00 heroku[router]: at=error code=H14 desc="No web
processes running" method=GET path="/" host=kiran-portfolio.herokuapp.com reques
t_id=5e69f860-dc72-4af3-9040-b1f0ae8af8e4 fwd="45.117.31.196" dyno= connect= ser
vice= status=503 bytes= protocol=https
2018-04-10T09:08:39.157957+00:00 heroku[router]: at=error code=H14 desc="No web
processes running" method=GET path="/favicon.ico" host=kiran-portfolio.herokuapp
.com request_id=2b372932-2ce2-4d45-9cdd-4f59b4422d76 fwd="45.117.31.196" dyno= c
onnect= service= status=503 bytes= protocol=https
2018-04-10T09:09:45.451328+00:00 heroku[router]: at=error code=H14 desc="No web
processes running" method=GET path="/" host=kiran-portfolio.herokuapp.com reques
t_id=d4de5c0a-c590-4b14-adc0-739cbe859feb fwd="45.117.31.196" dyno= connect= ser
vice= status=503 bytes= protocol=https
2018-04-10T09:09:52.145707+00:00 heroku[router]: at=error code=H14 desc="No web
processes running" method=GET path="/favicon.ico" host=kiran-portfolio.herokuapp
.com request_id=1392d710-b0b4-4a77-a01e-735041d98433 fwd="45.117.31.196" dyno= c
onnect= service= status=503 bytes= protocol=https
2018-04-10T09:10:00.000000+00:00 app[api]: Build started by user smschavan143@gm
ail.com
2018-04-10T09:10:26.434601+00:00 app[api]: Deploy 9d697adf by user smschavan143@
gmail.com
2018-04-10T09:10:26.434601+00:00 app[api]: Release v7 created by user smschavan1
43@gmail.com
2018-04-10T09:10:00.000000+00:00 app[api]: Build succeeded
2018-04-10T09:10:47.723358+00:00 heroku[router]: at=error code=H14 desc="No web
processes running" method=GET path="/" host=kiran-portfolio.herokuapp.com reques
t_id=b0f6be6e-393e-4416-b4d3-edb759292fa6 fwd="45.117.31.196" dyno= connect= ser
vice= status=503 bytes= protocol=https
2018-04-10T09:10:51.163961+00:00 heroku[router]: at=error code=H14 desc="No web
processes running" method=GET path="/favicon.ico" host=kiran-portfolio.herokuapp
.com request_id=cf906ebf-a5b9-42d3-98d7-0df7229e3d1e fwd="45.117.31.196" dyno= c
onnect= service= status=503 bytes= protocol=https
2018-04-10T09:10:56.992860+00:00 heroku[router]: at=error code=H14 desc="No web
processes running" method=GET path="/" host=kiran-portfolio.herokuapp.com reques
t_id=ce6d8b95-7508-

4e1e-8610-684369b3e0cd fwd="45.117.31.196" dyno= connect= ser
vice= status=503 bytes= protocol=https
2018-04-10T09:10:58.488848+00:00 heroku[router]: at=error code=H14 desc="No web
processes running" method=GET path="/favicon.ico" host=kiran-portfolio.herokuapp
.com request_id=9e1727a7-806d-490d-94ee-8a779beb21a8 fwd="45.117.31.196" dyno= c
onnect= service= status=503 bytes= protocol=https


Thanks,

/r/django
https://redd.it/8b6bvh

Stream BTC prices over WebSockets with Python and Lomond
https://www.willmcgugan.com/blog/tech/post/stream-btc-prices-over-websockets-with-python-and-lomond/

/r/Python
https://redd.it/8b6pig

What are some simple django-based blog projects which developers starting in webdev can use?

I am looking to start a django-based blog and would like to see if people have any recommendations for "ready-made" projects. Something like this as an example: https://github.com/miguelgfierro/sciblog.

My objective is to get the blog up and running as soon as possible and customize it with time. My theoretical webdev knowledge is good although I have zero practical experience and I want to take this opportunity to learn.

What are some simple django-based blog projects which developers new to webdev can start with?

/r/django
https://redd.it/8b7jt8

Anyone use Okta? Is it as easy as Flask-Login?

I'm just starting out with Flask, have found using Flask-Login really easy and pretty cool. But I'm worried about data protection, and thought using Okta might reduce liability. Anyone doing the same? Can it integrate with Flask-Login? The workflow for Okta looks pretty heavy - any opinions?

/r/flask
https://redd.it/8b7ik6

Best library for creating charts

Hi, I'm doing the final touches of a website (a 3-buildings warehouse) and I tought it would be cool to generate charts for a quick visualization of some of the information. I did a bit of googling to search what's the best library for Django and I found a lot of them, mainly Highcharts, Dash/Plotly, D3JS, Charts.js and many more.

What's the best (and easy to implement) library to create charts in a Django website you've ever used?

/r/django
https://redd.it/8b8nxq

What's everyone working on this week?

Tell /r/python what you're working on this week! You can be bragging, grousing, sharing your passion, or explaining your pain. Talk about your current project or your pet project; whatever you want to share.


/r/Python
https://redd.it/8b7uc8

Heroku Procfile automatically turns to .txt file

Hey guys i have been changing the Procfile name on Heroku with no extension through the cmd but every time i do a "git push heroku master" automatically the Procfile turns to Procfile.txt! What could have caused the problem?

/r/djangolearning
https://redd.it/8b7nz7

Red Hat Confirms RHEL 8 Will Drop Python 2
https://www.phoronix.com/scan.php?page=news_item&px=RHEL-8-No-Python-2

/r/Python
https://redd.it/8bb6oq

How do I configure Jupyter Notebooks to open in a browser?

When I open a Jupyter Notebook, I want it to open in a new tab of an existing Firefox window. In my ~/.jupyter/jupyter_notebook_config.py file, I try

c.NotebookApp.browser = '/usr/bin/firefox'

With this, I get a popup error from Firefox to the effect that "Firefox is already running", which isn't unexpected. You need to use command line flags to affect an already existing instance of Firefox, so I try

c.NotebookApp.browser = '/usr/bin/firefox -P default -new-tab'

When I do this, the terminal output from Jupyter gives the error

FileNotFoundError: [Errno 2] No such file or directory: '/usr/bin/firefox -P default -new-tab': '/usr/bin/firefox -P default -new-tab'

How do I tell Jupyter to open Firefox with command-line options?

/r/JupyterNotebooks
https://redd.it/8b8mtq

Best way to handle file uploads?

Im trying to setup image uploads in a local Flask app with Flask-uploads. I think Im almost there but not able to finish it.

This is my form (using flask_wtf):

class AddBookForm(FlaskForm):
title = StringField('Title', validators=[DataRequired()])
author = StringField('Author', validators=[DataRequired()])
category = StringField('Category', validators=[DataRequired()])
image = FileField('Image', validators=[FileRequired()])

this is my template:

<form action="/upload" method="post" enctype="multipart/form-data" >
<span class="btn btn-default btn-file">
Browse <input type="file" name="image">
</span>

<input type="submit" value="Upload your image" class="btn btn-primary">
</form>

and then finally these are the important bits from views.py:

from flask.ext.uploads import UploadSet, configure_uploads, IMAGES, UploadNotAllowed

photos = UploadSet('photos', IMAGES, default_dest=lambda app: os.path.basename('uploads'))
configure_uploads(app, (photos,))

@app.route('/upload', methods=['GET', 'POST'])
def upload():
if request.method == 'POST' and 'image' in request.files:
filename = photos.save(request.files['image'])
rec = Photo(filename=filename, user=g.user.id)
rec.store()
flash("Photo saved.")
return redirect(url_for('show', id=rec.id))
return render_template('upload.html')

@app.route('/photo/<id>')
def show(id):
photo = Photo.load(id)
if photo is None:
abort(404)
url = photos.url(photo.filename)
return render_template('show.html', url=url, photo=photo)

As it stands right now when I go to /upload and fill in the form with an image the file does actually get uploaded to my 'uploads' directory in my app but this error is shown in the console:

File "/Users/david/Documents/projects/flask_store/storeapp/views.py", line 236, in upload
rec = Photo(filename=filename, user=g.user.id)
NameError: name 'Photo' is not defined

there is no object named 'Photo' but if I changed the fields in my from from 'image' to 'photo' then try and upload an image again I get no errors that time but the image doesn't get uploaded to the local 'uploads' directory.

What am I missing here?

thanks


/r/flask
https://redd.it/8b8l7l

Flask and nodejs

Ok i have been reading online and i see that a lot of people and alot of companies are switching to nodejs im not a professional web developer but i like to build for personal use and for learning.

Is flask or django dying and what are the benefits of nodejs over flask (which is what i use)

/r/flask
https://redd.it/8b0pc9

Improving SyntaxError in PyPy
https://morepypy.blogspot.com.au/2018/04/improving-syntaxerror-in-pypy.html

/r/Python
https://redd.it/8bar30

RedHat 7.5 release notes warn Python 3 will replace Python 2 in next major release
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.5_release_notes/chap-red_hat_enterprise_linux-7.5_release_notes-architectures

/r/Python
https://redd.it/8bbbt6

Django Project Setup Guide
https://github.com/manufebie/django-project-setup-guide

/r/django
https://redd.it/8bc4x5

How do you figure out whether the duck needs to quack?

I have been using Python for a while and am loving it. However, as I begin to use old code or other people's code, I have found that it is getting really difficult to determine the interface people use since they rarely explicitly state it.

In Java the interface is made explicit and you can easily look-up what methods and types you need to define in order to expand or use another piece of code. But in Python, I have been spending a painful amount of time tracing through every part of a program to try and find out what methods I need for the object I am passing to some function. And if I miss a method I may not realize it till down the road when some obscure piece of code gets hit at run-time and I find out my object didn't have all that it needed.

Am I missing something here? Is there some proper way to Python so that the object interface is obvious? Are other people just not writing good Python code?

I feel like 'duck' typing is one of the biggest assets of Python, as it lets you work with objects based on how they function, but it seems exceedingly difficult to actually figure out whether the duck is supposed to quack or not.

Note: PyCharm is okay for some of this, but really doesn't hack it for anything but the simplest programs. And should it really be left to the IDE for something so important?

/r/Python
https://redd.it/8bebmr

[AF] SQLite Database Singleton

I've been cobbling together a Flask App which uses SQLite. I was wondering if someone would be prepared to weigh in on my current method of accessing the database - using a singleton?

Basically I am creating a Database singleton in *before_first_request* which connects to the database calling *sqlite3.connect()*.

I've noticed that in the Flask docs they provide an [SQLite example](http://flask.pocoo.org/docs/0.12/patterns/sqlite3/) which stores the database against the *flask.g* object.

My main concern with my approach would be with regard to thread safety, which I presume will depend heavily on the server I intend to use in production?

This flask docs article seems to be focused on connecting to the db on demand - but if requests to my app will always need to access the database, then I would assume its better to connect only once?




/r/flask
https://redd.it/89f1be

asyncio/aiohttp question

Hello, I am new to django and python in general. My django back-end calls amazon api and returns parsed response to front-end. Now I have to make it asynchronous.

My view looks something like this (very simplified):

class AmazonSearchAPI(viewsets.ViewSet):

def get_products(self, request):
response = requests.get(request_params)
return Response(response, status=HTTP_200_OK)

Question is, do I need aiohttp? Can I just add asyncio and write "async def get_products(self, request)"?

/r/django
https://redd.it/8bfgp8