I'm using Django 2.0
I am making Ajax request to FormView to render template inside <div> and want to redirect in certain case.
<script>
function loadNextQuestion() {
$('#question-box').load("{% url 'learn:question' course_learn.pk %}?session="+$('#session-id').val(), function(){
// other stuffs
});
}
</script>
and the view is like
class LearnQuestion(FormView):
form_class = SessionForm
template_name = 'learn/learn_question.html'
def get_context_data(self, **kwargs):
context = super(LearnQuestion, self).get_context_data(**kwargs)
course_learn = CourseLearn.objects.get(pk=self.kwargs['course_learn_id'])
session = self.request.GET['session']
question, question_type, options, complete = CourseLearn.objects.get_next_question(course_learn, session)
if complete:
context['complete'] = complete
context['course_learn'] = course_learn
context['session'] = session
return context
context['question'] = question
context['question_type'] = question_type
context['options'] = options
context['course_learn'] = course_learn
context['session'] = session
context['complete'] = complete
return context
def render_to_response(self, context, **response_kwargs):
if context['complete']:
return redirect(reverse('learn:success',
kwargs={
'course_learn_id': context['course_learn'].pk,
'session': context['session']
}))
return super(LearnQuestion, self).render_to_response(context, **response_kwargs)
which renders learn/learn_question.html template inside question-box <div> but redirects when context['complete'] is True
This works good but on redirect, the template of redirected URL is rendering in same <div id="question=box">
How can I redirect to a complete new page instead of rendering in same <div>?
The redirection won't work. Since normally when you return the HTTP response Redirect, a special kind of HTTP response is sent to browser. Which it interprets and redirects.
This works only when making a traditional request since, in that case, browser handles the response.
Here the situation is that, you are making an AJAX call.
So you have to check the response code of what you receive in JavaScript.
https://stackoverflow.com/a/17436256/4929982
$.ajax( url [, settings ] )
.always(function (jqXHR) {
console.log(jqXHR.status);
});
Then redirect in case it is redirect ( code: 301 or 302).
Redirect using:
window.location.replace('your_url') ;
You should get your_url from the response object.
Related
I have a django project where the page has multiple nav links representing different agents. On clicking any nav link, the urls.py redirects to nav specific view and the view needs to perform some processing to get the data needed to render the template. However as this is syncrhonous rendering it takes a long while to load data (in the order of 15-20s).
Below is my urls.py:
from django.urls import path
from . import views
app_name = 'agent'
urlpatterns = [
path('agent1/', views.agent1, name='agent1'),
path('agent2/', views.agent2, name='agent2'),
path('agent3/', views.agent3, name='agent3'),
path('agent4/', views.agent4, name='agent4'),
]
My views method looks as below:
def agent1(request):
agent_data = Agent1.objects.all()
agent_details = get_agent_details(agent_data)
return render(request, 'manager/data.html', {'agent_data': agent_data, 'agent_details': agent_details})
I am using the {{ agent_data.name }}, {{ agent_data.code }}, {{ agent_data.qty }} and {{ agent_data.price }} along with data from agent_details dictionary in my html to populate a table's rows. How should I change my view method, so that it loads the data via AJAX (javascript) in order to show a loading gif in the meantime and also provide me the data so that I can populate the table. Could someone help me with the Ajax code and the steps as I am new to this technology and not finding any help going through the online tutorials.
So for this to work with ajax, you'll need some javascript in manager/data.html which knows the url to fetch data from.
As an example, I've got an ajax setup which checks a given email address isn't already in use;
(function($) {
$(document).ready(function() {
var validateEmailURL = $section_user_signup.data('ajax-email-url');
function validateEmailUnique() {
var valid = true;
clearError($email);
// Fetch unique status of the provided email
$.ajax({
async: false,
url: validateEmailURL,
method: 'POST',
type: 'POST',
dataType: 'json',
data: {
'email': $email.val(),
'csrftoken': $form.find('input[name="csrfmiddlewaretoken"]').val()
},
success: function (response) {
valid = true;
},
error: function (response) {
setError($email, response["responseJSON"]["error"]);
valid = false;
}
});
return valid;
}
});
})(window.jQuery);
This javascript uses the data attribute of a div for the URL to check;
<div data-ajax-email-url="{% url 'account_ajax_validate_email' %}">
The view which the ajax call goes to looks like this;
def ajax_check_email_unique(request, *args, **kwargs):
"""
Return an JsonResponse to identify if an email is unique.
"""
if not request.is_ajax():
return HttpResponseBadRequest()
if request.is_ajax and request.method == "POST":
email = request.POST.get('email')
if email_address_exists(email):
return JsonResponse(
{
"error":
"Email address already exists. Click "
f"here "
"to login"
},
status=400
)
return JsonResponse(
{"email": email},
status=200
)
# some error occurred
return JsonResponse({"error": ""}, status=400)
The important thing for any view which will be used by javascript is that you return a JsonResponse.
So if I was you, I'd setup a new view for ajax, and that makes your existing one really simple;
def agent1_ajax(request):
agent_data = Agent1.objects.all()
agent_details = get_agent_details(agent_data)
return JsonResponse({
"agent_data": agent_data, "agent_details": agent_details
}, status=200)
def agent1(request):
return render(request, 'manager/data.html', {})
And as far as a loading gif goes, you'd need an element that contains the gif and then you can bind to the ajax event to show/hide;
$(document).ajaxStart(function() {
$("#loading").show();
});
$(document).ajaxStop(function() {
$("#loading").hide();
});
I am trying to write a small restful api application, i am using Chrome Postman extension for sending requests to the app .
I believe that my code does not have mistakes but every time i am sending post request a 400 Bad Request error raising , here is my code:
#api_route.route('/api', methods=['GET'])
def api():
return jsonify({'message':'Api v1.0'})
#api_route.route('/api', methods=['POST'])
def create_user():
data = request.get_json()
if data:
hashed_password = generate_password_hash(data['password'], method='sha256')
api = Api(email=data['email'], password=hashed_password)
db.session.add(api)
db.session.commit()
return jsonify({'message', 'New User Created!'})
The json data that i am sending looks like this:
{"email" : "Test", "password" : "123123123"}
Why i am getting the 400 error ??
Update:
Screenshots for the requests using Postman:
GET Request
POST Request
Here i am initiating api route inside api controller :
from flask import Blueprint
api_route = Blueprint(
'api',
__name__
)
from . import views
then i am registering it inside def create_app() function :
from .api import api_route
app.register_blueprint(api_route)
Here are the extensions that i am using in my application:
toolbar = DebugToolbarExtension()
assets_env = Environment()
cache = Cache()
moment = Moment()
htmlminify = HTMLMIN()
csrf = CSRFProtect()
jac = JAC()
googlemap = GoogleMaps()
session = Session()
principal = Principal()
I solved the problem, i've initiated CSRFProtect with app so i need to include X-CSRFToken in all my requests, so i have two choices:
1 - To include the csrf_token in request.headers for all the requests
2 - Using #csrf.exempt decorator that coming with flask_wtf.csrf
For now i am using #csrf.exempt, so it become like this:
#api_route.route('/api', methods=['GET','POST'])
#csrf.exempt
def create_user():
if request.method == 'GET':
return jsonify({'message' : 'API v1.0'})
elif request.method == 'POST':
data = request.get_json()
hashed_password = generate_password_hash(data['password'], method='sha256')
new_user_api = Api(email=data['email'], password=hashed_password)
db.session.add(new_user_api)
db.session.commit()
return jsonify({'message' : 'New user created!'})
return return jsonify({'message' : 'No user has been added!'})
Thanks for #MrPyCharm for his interests , salute :) .
A good approach would be to structure your views as follows:
Instead of creating view with same route for different request methods, you can handle the request methods in the same view:
#api_route.route('/api', methods=['GET', 'POST'])
def api():
if request.method == 'GET':
return jsonify({'message':'Api v1.0'})
else:
data = request.get_json(force=True)
if data:
hashed_password = generate_password_hash(data['password'], method='sha256')
api = Api(email=data['email'], password=hashed_password)
db.session.add(api)
db.session.commit()
return jsonify({'message': 'New User Created!'})
# Just in case the if condition didn't satisfy
return None
A note for anyone else experiencing this with PostMan and Flask - you will also hit a HTTP 404 if your URL in PostMan is HTTPS but your Flask app only handles HTTP.
I have the url and corresponding view as follows.
url(r'^(?P<token>.*?)/ack$', views.api_ACK, name='device-api_ack')
def api_ACK(request, token):
"""
Process the ACK request comming from the device
"""
logger.info('-> api_ACK', extra={'request': request, 'token' : token, 'url': request.get_full_path()})
logger.debug(request)
if request.method == 'GET':
# verify the request
action, err_msg = api_verify_request(token=token, action_code=Action.AC_ACKNOWLEDGE)
return api_send_answer(action, err_msg)
I want to call api_ACK function with request method as GET from another view api_send_answer
I am creating one url in /device/LEAB86JFOZ6R7W4F69CBIMVBYB9SFZVC/ack in api_send_answer view as follows..
def api_send_answer(action, err_msg, provisional_answer=None):
last_action = create_action(session,action=Action.AC_ACKNOWLEDGE,token=last_action.next_token,timer=500)
url = ''.join (['/device/',last_action.next_token ,'/',Action.AC_ACKNOWLEDGE])
logger.debug('Request Url')
logger.debug(url)
response = api_ACK(request=url,token=last_action.next_token) # This is wrong
Now from api_send_answer it is redirecting to api_ACK view, but how to call api_ACK with request method as GET?
Please help..Any suggestions would be helpful to me
This line
response = api_ACK(request=url,token=last_action.next_token) is wrong because view expects HttpRequest object and you give him url instead.
if you need to return view response to user, you can use redirect:
def api_send_answer(action, err_msg, provisional_answer=None):
last_action = create_action(session,action=Action.AC_ACKNOWLEDGE,token=last_action.next_token,timer=500)
url = ''.join (['/device/',last_action.next_token ,'/',Action.AC_ACKNOWLEDGE])
logger.debug('Request Url')
logger.debug(url)
return HttpResponseRedirect(url)
if you need to do something else with view response you have to use HttpRequest object not url as parameter.
i'm new in django and also in angularjs.
I wants to use Django for a REST api and angularjs for frontend view.
I have a django view that returns a json response:
class MyView(View):
def get(self, request):
data = serializers.serialize('json', MyModel.objects.order_by('name'))
return HttpResponse(data, mimetype='application/json')
def options(self, request):
response = HttpResponse()
response['allow'] = ','.join(['get', 'post', 'put', 'delete', 'options'])
return response
calling
http://localhost:8000/myapp/myview
i get the right json response
If in an angularjs controller (controllers.js) i try to call that view like this:
angular.module('myApp.controllers', []).
controller('MyCtrl', ['$scope', '$http', function($scope, $http) {
$scope.test = "Hola";
delete $http.defaults.headers.common['X-Requested-With'];
$http.get('http://localhost:8000/myapp/myview').success(function(data) {
$scope.results = data;
console.log(data);
}).error(function(data, status) {
$scope.data = data || "Request failed";
$scope.status = status;
console.log(data);
});
}]);
"test" value is correctly printed in the template
in django log i have: "GET /myapp/myview/ HTTP/1.1" 200 853
but in angular i don't retrieve any data. If i put a break point in error method, i have data empty and status = 0.
Any hints?
Am i missing something?
Been struggling with the same. The problem is with CORS. The solution is here
$http.get('http://localhost:8000/myapp/myview/').success(function(data)
The URL needs to drop the trailing /, then append .json. Like so:
$http.get('http://localhost:8000/myapp/myview.json').success(function(data)
I want to set a cookie inside a view and then have that view render a template. As I understand it, this is the way to set a cookie:
def index(request):
response = HttpResponse('blah')
response.set_cookie('id', 1)
return response
However, I want to set a cookie and then render a template, something like this:
def index(request, template):
response_obj = HttpResponse('blah')
response_obj.set_cookie('id', 1)
return render_to_response(template, response_obj) # <= Doesn't work
The template will contain links that when clicked will execute other views that check for the cookie I'm setting. What's the correct way to do what I showed in the second example above? I understand that I could create a string that contains all the HTML for my template and pass that string as the argument to HttpResponse but that seems really ugly. Isn't there a better way to do this? Thanks.
This is how to do it:
from django.shortcuts import render
def home(request, template):
response = render(request, template) # django.http.HttpResponse
response.set_cookie(key='id', value=1)
return response
The accepted answer sets the cookie before the template is rendered. This works.
response = HttpResponse()
response.set_cookie("cookie_name", "cookie_value")
response.write(template.render(context))
If you just need the cookie value to be set when rendering your template, you could try something like this :
def view(request, template):
# Manually set the value you'll use for rendering
# (request.COOKIES is just a dictionnary)
request.COOKIES['key'] = 'val'
# Render the template with the manually set value
response = render(request, template)
# Actually set the cookie.
response.set_cookie('key', 'val')
return response
response = render(request, 'admin-dashboard.html',{"email":email})
#create cookies
expiry_time = 60 * 60 #in seconds
response.set_cookie("email_cookie",email,expiry_time);
response.set_cookie("classname","The easylearn academy",expiry_time);
def index(request, template):
response = HttpResponse('blah')
response.set_cookie('id', 1)
id = request.COOKIES.get('id')
return render_to_response(template,{'cookie_id':id})