Flask refresh page after post

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flask refresh page after post

Already on GitHub? Sign in to your account. Why doesn't flask reload when I change my code? It should automatically reload my app Is flask-script now obsolete in 0. Now that since I've been wanting to upgrade to newer flask version 0. I'm a bit confused on why this is happening Also I believe there is something holding back flask from actually being able to auto reload when any part of my code base changes It doesn't automatically reload anymore Is there something I can do about this in my development environment?

Also because of this change Will this affect how uwsgi is implemented with supervisor? If so could you please point out where are the changes? In addition could you please let me know if application factory pattern of designing larger apps still work?

Refresh DIV Content Without Reloading Page using setTimeout Function in Jquery - atx.warmthjarne.pw

Or what sort of modifications were made to this patter? Also I believe there is something holding back flask from actually being able to auto reload when any part of my code base changes.

This would be an actual bug, but you still haven't described which exact steps you take, such that I can reproduce your issue. There's a bunch of unrelated questions you additionally asked which I can't all answer.This post is about creating Python Flask web pages that can be asynchronously updated by your Python Flask application at any point without any user interaction.

The working application is hosted on GitHub. What I want to achieve here is a web page that is automatically updated for each user as a result of events that happened in the background on my server system. In this post, I show how to develop a bare-bones Python Flask application that updates connected clients with random numbers. Flask is an extremely lightweight and simple framework for building web applications using Python. Gone are the days of static HTML pages that load when you visit; with Socket technology, the server can continuously update your view with new information.

For Socket. Implementing event triggers or binding event callbacks are very simply implemented in Flask after some initial setup using:.

Four events are allowed in the socketio. I would really recommend the JavaScript path on CodeSchool if you are not familiar with these technologies. And that, effectively, is the bones of sending messages between client and server.

Hence, in application. In our main Flask code then, we start this RandomThead running, and then catch the emitted numbers in Javascript on the client. Client presentation is done, for this example, using a simple bootstrap themed page contained in the Flask Template folder, and the number handling logic is maintained in the static JavaScript file application.

A running list of 10 numbers is maintained and all connected clients will update simultaneously as new numbers are generated by the server. Flask served web pages that react to events on the server. Perhaps in part2. The final output should look like this:. You can find all of the source code on GitHubwith instructions on how to install the necessary libraries etc.

Feel free to adapt to your own needs, and leave any comments if you come up with something neat or have any problems. This functionality is documented in the original documentation for Flask-SocketIO.

The documentation and tutorials are quite comprehensive and worth working through if you are interested in more. Why is it only within the console are the random numbers being generated, but nothing on the browser after. Or simply updating it within the same TextField, similar to how real time stock quotes are displayed?

Install eventlet or gevent and gevent-websocket for improved performance. Hi guys, I think some version issues are affecting this. Can you try putting in the following code and see if it works at the top of the file:. Hi guys, download the jquery and socketio files and put this in static directory. And, monkey. My bad, I found the eventlet module and applied this to the application. Running python 3.

Made appropriate changes to application. Can you please help out? How would one go about if one wanted to have not the same random numbers for each client, but a different set of data for each? Could someone please answer the following question which i also see above: Which jquery and sockio files?

One issue I found is that in an attempt to clone the repository and then set up my virtual environment, you indicate to :. Something else to add on, In my case, I added this modification : when the client disconnects, also stop the thread using :.Use [Ask Flask] or [AF] if you have a very specific problem and need help with code. Everything add to cart is clicked post requestmy session['cart'] is updated to include the new product added list of items in the cart.

From what I understand teh way the refresh button works in browsers is to actually just resend the last request, so this issue might be in the method you are using to add items to your cart and not necessarily refreshing being the problem. You could look into ajax. This would allow users to add items without submitting the form and causing a redirect. Instead of causing a redirect, it would just make an asynchronous call to your API to add the item without ever leaving the current screen.

However, this would require restructuring the design of your site to handle dynamic data, vs static page loads. Use of this site constitutes acceptance of our User Agreement and Privacy Policy.

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Use [Extension-name] if you are discussing a certain extension to Flask. Looking for dev jobs? Welcome to Reddit, the front page of the internet. Become a Redditor and join one of thousands of communities. Hello, Currently I am working on my webpage that has an "add to cart" feature. Want to add to the discussion? Post a comment! Create an account.This is the ninth installment of the Flask Mega-Tutorial series, in which I'm going to tell you how to paginate lists of database entries.

Note 1: If you are looking for the legacy version of this tutorial, it's here. Note 2: If you would like to support my work on this blog, or just don't have patience to wait for weekly articles, I am offering the complete version of this tutorial packaged as an ebook or a set of videos.

For more information, visit courses. In Chapter 8 I have made several database changes necessary to support the "follower" paradigm that is so popular with social networks. With that functionality in place, I'm ready to remove the last piece of scaffolding that I have put in place in the beginning, the fake posts. In this chapter the application will start accepting blog posts from users, and also deliver them in the home and profile pages.

Let's start with something simple. The home page needs to have a form in which users can type new posts. First I create a form class:. The changes in this template are similar to how previous forms were handled. The final part is to add the form creation and handling in the view function:.

Websites built with Flask

Before I continue, I wanted to mention something important related to processing of web forms. Notice how after I process the form data, I end the request by issuing a redirect to the home page.

I could have easily skipped the redirect and allowed the function to continue down into the template rendering part, since this is already the index view function. So, why the redirect?

It is a standard practice to respond to a POST request generated by a web form submission with a redirect. This helps mitigate an annoyance with how the refresh command is implemented in web browsers.

All the web browser does when you hit the refresh key is to re-issue the last request. If a POST request with a form submission returns a regular response, then a refresh will re-submit the form. Because this is unexpected, the browser is going to ask the user to confirm the duplicate submission, but most users will not understand what the browser is asking them. But if a POST request is answered with a redirect, the browser is now instructed to send a GET request to grab the page indicated in the redirect, so now the last request is not a POST request anymore, and the refresh command works in a more predictable way.

It avoids inserting duplicate posts when a user inadvertently refreshes the page after submitting a web form. If you recall, I created a couple of fake blog posts that I've been displaying in the home page for a long time.

These fake objects are created explicitly in the index view function as a simple Python list:. So now I can replace the fake posts with real posts:. Calling all on this query triggers its execution, with the return value being a list with all the results. So I end up with a structure that is very much alike the one with fake posts that I have been using until now.

It's so close that the template does not even need to change. As I'm sure you noticed, the application as it is does not do a great job at letting users find other users to follow. In fact, there is actually no way to see what other users are there at all. I'm going to address that with a few simple changes.

I'm going to create a new page that I'm going to call the "Explore" page. This page will work like the home page, but instead of only showing posts from followed users, it will show a global post stream from all users. Here is the new explore view function:. Did you notice something odd in this view function?Good applications and user interfaces are all about feedback. If the user does not get enough feedback they will probably end up hating the application.

Flask provides a really simple way to give feedback to a user with the flashing system. The flashing system basically makes it possible to record a message at the end of a request and access it next request and only next request. This is usually combined with a layout template that does this.

Note that browsers and sometimes web servers enforce a limit on cookie sizes. This means that flashing messages that are too large for session cookies causes message flashing to fail silently.

And here is the layout.

flask refresh page after post

Here is the index. And here is the login. It is also possible to provide categories when flashing a message. The default category if nothing is provided is 'message'.

Alternative categories can be used to give the user better feedback. For example error messages could be displayed with a red background. To flash a message with a different category, just use the second argument to the flash function:. The loop looks slightly different in that situation then:.

This is just one example of how to render these flashed messages. This is useful if you wish to render each category in a separate block.

MicroPython and the Internet of Things

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. And here is the webpage showing only the form and the variables that are changed when the SearchForm is submitted :. Firstly, I have looked at Flask: redirect to same page after form submission and I believe I tried to implement what was accepted as the correct answer, but it did not work for me since I am also trying to submit variables to the updated webpage rather than just refresh the webpage.

I want to be able to submit the webpage's SearchForm and then update my webpage with the cLinkName and lLinkName produced from submitting my SearchForm more than once. Unfortunately my code is only allowing me to submit the SearchForm and then update my webpage with the cLinkName and lLinkName produced from submitting my SearchForm exactly once.

So my question is how can I get my webpage to allow me to submit the SearchForm and update itself more than once? Learn more. Asked 2 years, 11 months ago. Active 2 years, 11 months ago. Viewed 22k times. Lightfoot C. Lightfoot 1 1 gold badge 4 4 silver badges 20 20 bronze badges. What is rendered for your form action on the page? The first time it prints out statements to the console log that are in the algorithm and updates the webpage after the POST request is completed.

Any other time it skips the algorithm and immediately states a POST request has been completed nor does it update the webpage.

Lightfoot Oct 19 '17 at It is not clear to me. Are you trying to view all searched cLinkName and lLinkName in the table?

Asynchronous updates to a webpage with Flask and Socket.io

Active Oldest Votes. I currently do this but it adds the same page to the browser history, so when you click back you will return to the same page. Any ideas on how to resolve this? The Overflow Blog. Podcast Ben answers his first question on Stack Overflow. The Overflow Bugs vs. Featured on Meta. Responding to the Lavender Letter and commitments moving forward.

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flask refresh page after post

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