CODEWITHSUNDEEP
django
sclee1
sclee1

Reputation: 1281

how to set parameter in json in django?

I am newbie to dJango and javascript.

I am trying to pass the variable into the parameter in my function so that the function is called using the variable.

Below are codes.

view.py

def plot_graph(request,column):
    data = Data.objects.all() \
        .extra(select={'data': connections[Data.objects.db].ops.date_trunc_sql('data', column)}) \
        .values(column)

    return JsonResponse(list(data),safe=False)

urls.py

urlpatterns = [
    url(r'^form/$', views.Form),
    url(r'^api/plot_graph/(?P<column>[\w-]+)', views.plot_graph, name='plot_graph'),
]

form.html

var c = {{column_json | safe}}

d3.json("{% url "plot_graph" column=c %}", function(error, data) {
  data.forEach(function(d){
    d.c5 = d.c5;
  });

What I want to do is that variable c is passed into the d3.json so that function plot_graph is used according to the variable c. However, below code gives me an error saying that Reverse for 'plot_graph' with keyword arguments '{'column': ''}' not found. 1 pattern(s) tried: ['index/api/plot_graph/(?P<column>[\\w-]+)']

How to resolve this issue?

Upvotes: 0

Views: 545

Answers (1)

Raydel Miranda
Raydel Miranda

Reputation: 14360

The problem here is that c is a js variable, the context variable c does not exist, and the url tag is a django template tag, so it expects context variables o base types like str, int, ect ..

Try:

d3.json("{% url "plot_graph" column=column_json|safe %}", function(error, data) {
  data.forEach(function(d){
    d.c5 = d.c5;
});

You can use context variables and filters inside other tags.

On the other hand ...

You have to be sure you have the content you expect in column_json or if after apply the safe filter there is some useful content.

Upvotes: 1

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