DJANGO simplejson
-
06-06-2021 - |
سؤال
Good afternoon..i have a model with a class like this:
class Reportage:
def get_num(self):
end_date = self.date.end_date
start_date = self.date.start_date
duration = time.mktime(end_date.timetuple()) - time.mktime(start_date.timetuple())
delta_t = duration / 60
num = []
for t in range(0,duration,delta_t):
start = t + start_date
end = datetime.timedelta(0,t+delta_t) + start_date
n_num = self.get_num_in_interval(start,end)
num.append([t, n_num])
return num
I want to serialize with simplejson the array num []
in the views.py for passing in a second moment this array to a jquery script to plot it in a graph..
what's the code to serialize that array..?
I hope I was clear .. thanks in advance to all those who respond ..
المحلول
Following @ninefingers' response. I think that your question is aimed on how to make that dumped json string available to a jQuery plugin.
# views.py
def my_view(request):
# do stuff
num = reportage_instance.get_num()
num_json = simplejson.dumps(num)
return render(request, 'template.html', {
'num_json': num_json,
})
In your template, you make available that json obj as a Javascript variable
# template.html
<html>
<body>
<script>
var NUM_JSON = {{num_json|safe}};
myScript.doSomething(NUM_JSON);
</script>
</body>
</html>
Now you can call regular JS with the NUM_JSON variable.
نصائح أخرى
If you're looking to do this in a model, something like this would work:
# if this were a models.py file:
import simplejson
# other django imports:
class SomeModel(models.Model):
property = models.SomeField()...
def some_function(self):
num = []
# full num
simplejson.dumps(num)
That'll dump num
to a string-representation of the json, which you can then return, or write to a file, and so on.
From a view you have a choice - but if your view is an ajax view returning some json for processing you might do this:
# views.py
# ...
def my_ajax_call(request, model_pk):
try:
mymodel = SomeModel.get(pk=model_pk)
except SomeModel.NotFoundException as e:
return HttpResonse("Unknown model", status=404)
else:
return HttpResponse(mymodel.some_function()) # returns simplejson.dumps(num)
This can then be used from a template in Javascript - the other answer shows you how you might approach that :)