jinja2 - w3toppers.com

Flask Dynamic data update without reload page

Working example: app.py from flask import Flask, render_template, request import requests from bs4 import BeautifulSoup app = Flask(__name__) @app.route(“https://stackoverflow.com/”) def index(): return render_template(‘index.html’) @app.route(‘/suggestions’) def suggestions(): text = request.args.get(‘jsdata’) suggestions_list = [] if text: r = requests.get(‘http://suggestqueries.google.com/complete/search?output=toolbar&hl=ru&q={}&gl=in’.format(text)) soup = BeautifulSoup(r.content, ‘lxml’) suggestions = soup.find_all(‘suggestion’) for suggestion in suggestions: suggestions_list.append(suggestion.attrs[‘data’]) #print(suggestions_list) return render_template(‘suggestions.html’, suggestions=suggestions_list) if __name__ … Read more

How to use g.user global in flask

g is a thread local and is per-request (See A Note On Proxies). The session is also a thread local, but in the default context is persisted to a MAC-signed cookie and sent to the client. The problem that you are running into is that session is rebuilt on each request (since it is sent … Read more

How do you sort a list in Jinja2?

As of version 2.6, Jinja2’s built-in sort filter allows you to specify an attribute to sort by: {% for movie in movie_list|sort(attribute=”rating”) %} See http://jinja.pocoo.org/docs/templates/#sort

Convert integer to string Jinja

I found the answer. Cast integer to string: myOldIntValue|string Cast string to integer: myOldStrValue|int

In Jinja2, how do you test if a variable is undefined?

From the Jinja2 template designer documentation: {% if variable is defined %} value of variable: {{ variable }} {% else %} variable is not defined {% endif %}

How to use url_for() to pass path and query data to a route using FastAPI and Jinja2?

This is not FastAPI’s issue, but rather Starlette’s issue (i.e., request.url_for() receives path parameters, not query parameters). So, nspired by #560 and #1385, I have created the following working example for calling FastAPI routes from within Jinja2 templates, and passing query params (alone or along with path params as well). Please note that this is … Read more

Converting Flask form data to JSON only gets first value

request.form is a MultiDict. Iterating over a multidict only returns the first value for each key. To get a dictionary with lists of values, use to_dict(flat=False). result = request.form.to_dict(flat=False) All values will be lists, even if there’s only one item, for consistency. If you want to flatten single-value items, you need to process the data … Read more

Link to a specific location in a Flask template

Thanks to dirn’s comments I managed to get this working with the code below. Pass the _anchor keyword to url_for to append an anchor to the generated URL. nav menu: <a href=”https://stackoverflow.com/questions/35843675/{{ url_for(“.stuff’, _anchor=”exactlocation”) }}”>Go to specific id on suff page</a> Flask route: @main.route(“https://stackoverflow.com/”) def stuff(): return render_template(‘stuff.html’) stuff.html: … <section id=”exactlocation”> …

Unable to pass jinja2 variables into javascript snippet

Try with quotes: alert(“{{name}}”);

Chrome blocks FastAPI file download using FileResponse due to using HTTP instead of HTTPS

Option 1 You could use HTTPSRedirectMiddleware to enforce all incoming requests to http being redirected to the secure scheme instead. from fastapi.middleware.httpsredirect import HTTPSRedirectMiddleware app = FastAPI() app.add_middleware(HTTPSRedirectMiddleware) Option 2 In addition to the above, you could use relative URLs instead of using url_for() in your Jinja2 template; for instance: <a href=”/upload_schedule”>Link text</a> In this … Read more