How do I pass string parameters from django to javascript function?

Question

I have a problem calling a function with string parameters obtained from python.

python_var -> html calls the function of js with parameters obtained from python context -> js file

Browser console says: Uncaught ReferenceError
I am using Django template language to get the variable which is defined as a string in python.

foo.html

<script>
 libcharts_predict_k( {{title|safe}}, {{data|safe}})
</script>

I am sure the problem is only with Strings in JS function parameters because with arrays and numbers I didn't have any problem.
Browser tries to reference something but I am giving as a value

view.py

def second_view(request):
    title = "A long title"
    data= df['value'].values.tolist()
    context = {
               'data': data,
               'title': title
               }
return (request, 'app/foo.html', context=context)

*(Imports are fine)

bruno desthuilliers · Accepted Answer · 2019-08-28 15:02:10Z

1

Short answer: put quotes around your template vars:

libcharts_predict_k("{{title|safe}}", "{{data|safe}}")

And since data is a list you want to jsonify it before (in your view):

import json

# ....

data = json.dumps(df['value'].values.tolist())

answered Aug 28, 2019 at 15:02

bruno desthuilliers

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2 Comments

srttowers Over a year ago

Ok I tried python libcharts_predict_kilos_ventas_familia( '{{titulo|safe}}',{{data|safe}}) and it works, thanks for the idea!

bruno desthuilliers Over a year ago

cf the edit (added after you posted your view code)

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