Is there any way I can use Django forms inside a ReactJS script, like include {{ form }} in the JSX file?
I have a view which displays a from and it is rendered using React. When I load this page from one page the data in these fields should be empty, but when I hit this view from another page I want date to be prefilled in this form. I know how to do this using Django forms and form views, but I am clueless where to bring in React.
The {{ form }} statement is relative to Django template. Django templates responsible for rendering HTML and so do React, so you don't have to mix the two together.
What you probably want to do is to use the Django form validation mechanism server side, let React render the form client-side. In your Django view, simply return a JSON object that you can use in your React code to initialize your form component.
Related
I'm working my way through Google's App Engine Guestbook example (to be found here: https://cloud.google.com/appengine/docs/standard/python/getting-started/creating-guestbook)
I'm trying to redirect the output (the Greetings) to another page as opposed to the index.html where they're currently displayed after a user presses the "Sign the Guestbook" button. I created a separate page called greetings.html where I copied the display code from the index.html page. However, I don't know how to modify guestbook.py to make the output go to the new page.
webapp2 has a built-in redirect method:
return redirect('/some-path')
However, I think you would probably rather send the gathered data to the greetings.html template? Under the POST method, you could do:
template_values = {
'guestbook_name': guestbook_name,
# etc.,
}
template = JINJA_ENVIRONMENT.get_template('greetings.html')
self.response.write(template.render(template_values))
I'm not sure if this is even possible, but I would like to grab a user's input, pull it into my views.py, manipulate it, and then use that data in other views.
I do not need this data stored in a database, as I won't be referencing it again, and I want to keep this as lightweight as possible.
Currently, I'm trying to pull data from espn's fantasy football site using the python library espnff. My homepage consists of a textfield box and a submit button (Think of google.com).
I have functions set up that will comb through an espn url such as http://games.espn.com/ffl/clubhouse?leagueId=123456 to grab the leagueID, from there I make use of espnff to grab more info on that league.
My ideal use case is someone comes to my site, copies and pastes their league url like the one above, clicks submit and then brings them to https://example.com/{{ leagueID}/ which will display different info that I gather.
I have not found a way to do this without submitting the user input to a model. Is possible to avoid using the database? If so how?
Not sure I understood it right, but what you are trying to do can easily be done without using any models/database or any other kind of persistent storage.
The user submits that information using the form, you grab the URL from the request object in your view, parse the URL to get the league_id and then redirect the user to /{league_id}.
Then on that view, you gather the league_id parameter (from the url), use the library (espnff) to fetch the data with that id and then render the template with that data.
For example, the implementation would be something in these lines:
Make a form in your html template:
<form method="post" action="/">
{% csrf_token %}
<input type="text" name="league_url"/>
<input type="submit" value="Submit" />
</form>
in urls.py:
url(r'^$', index_view, name="index"),
url(r'^(?P<league_id>[0-9]+)$', league_view, name="league_view")
in views.py:
def index_view(request):
if request.method == 'POST':
league_url = request.POST.get('league_url', None)
# Your code to parse the URL and extract the ID
return HttpResponseRedirect('/{}'.format(league_id))
else:
# render form template
def league_view(request, league_id):
# your code here using the league_id
# and render the page with data
(I didn't tested that code, I just wrote it quickly as an example of the flow)
The django documentation describes quite extensively how to do caching with django. You can find the documentation on how to set that up here
Once it's been set up you simply use the cache in the following way
from django.core.cache import cache
cache.set('my_key', 'my_value', 60) # number is in seconds
value = cache.get('my_key')
You can provide dictionaries and such as values. The caching framework will serialize that for you using pickle.
I have the form which i am showing by normal view. Then i am send the GET parameters to djnago ChangeList view like django does for lookups like this
student/?region__id__exact=1&status__exact=Published
now is there any way to remove that from the URL in the address bar.
I don't users to see what i am doing
The whole point of GET is that they are retrieved from the URL itself, removing them from the URL removes them entirely.
If you want them 'hidden' you will need to use POST.
The HTTP GET method of form submission passes the information from template to views through URL. If you want to "hide" information from URL use POST instead. In your form do like this:
<form action="/view_name/" method="post">
and in views:
request.POST['name']
How can I create a widget on the site, such as login forms, dynamic menu (items taken from the database), site statistics?
I know that you can render a template that will extend out of a base template. And in the base template you can create these widgets.
But I do not know how to move the logic from the base template to my code. For example, the selection data for the block. Such actions certainly can be done in the template, but it would be a poor method in my opinion.
Sorry for my bad English. If you can not understand, I'll try to rephrase.
You would use a python library called WTForms. It helps you write code for creating forms and other widgets backed by database which you can render using jinja2 templates.
class YourForm(Form):
your_field1 = TextField()
....
your_fieldn = SubmitField()
#app.route('/')
def view():
form=YourForm()
return render_template('your.html', form=form)
In your.html
<form >
{{ form.your_field1 }}
....
{{ form.your_fieldn }}
</form>
Check out this flask pattern for form validation and rendering to know more about it.
Edit: To create global variables available to all templates,there are two ways:
You can use global dict of jinja environment.
This is the code:
app.jinja_env.globals.update({'variable':1})
You can use ContextProcessor. Code:
#app.context_processor
def inject_variable():
return dict(variable=1)
Now you can access variable in any template of your app.
I have an HTML file that has a web page design with a single form, for a user to enter his name. I want to create an six entry array for every submission (to later be filled with information on another page)
Is Django the proper utility to use for this? I would like to have the html design file and the python back end processing as separate files. If so, can anyone point me towards a good place to read about integrating HTML and underlying python codes that process HTML submission forms?
Django may be overkill for this. If all you want is a way to link a form to some backend Python code, a micro framework like Flask might be a better choice.
Here is how you do a simple form with Flask:
Create a directory project and inside it, a directory templates
Your template is simple:
{% if name %}
Hello {{ name }}
{% endif %}
<form method="POST">
<input type="text" name="name" value="Enter your name">
<input type="submit">
</form>
Save that as index.html in the templates subdirectory.
Create a file called go.py in the project directory, and in it copy and paste this:
from flask import Flask
from flask import render_template
from flask import request
app = Flask(__name__)
#app.route('/',methods=['POST','GET'])
def process_form():
if request.method == 'POST':
form_input = request.form['name']
return render_template('index.html',name=form_input)
else:
return render_template('index.html')
if __name__ == '__main__':
app.run(debug=True)
Finally from the project directory, type:
python go.py
Open your browser and go to http://localhost:5000/
You can create html form in Django, though you may have to convert the form to a template.
In case this you first time to use django, you may go though the official Django book
Django provides a template system (in which the presentation files are separate from the business logic and the entire system is highly decoupled). The template language is simple (but very powerful) text substitution on top of an existing text file. You can use the Django templates in HTML (full or partial), text, XML, JSON, or nearly any other text-based format.
Django also allows you to hook into another template system, but I don't know a lot about how that works.
Look at the Django template documentation for more information.