Displaying a text in a Django template as a JSON entity

I am currently facing a challenge with an angular app that sends JSON data to a Django backend. The Django application saves the JSON data into a database and later retrieves it to send it back to the angular app. However, I am struggling to get this entire process to function correctly.

Below is the view responsible for passing the JSON data back to the template:

def myview(request, uid):
    formrecord = FormData.objects.get(someid=uid)
    return render(request, 'myview.html', {'formdata': formrecord.data})

This is how the `formrecord.data` looks before the `render()` method above is called:

(Pdb) formrecord.data
u'{"user":{"firstName":"Bob","lastName":"Henderson"}}'

Here is my template snippet:

<script>
var mydata = {{ formdata }};
mydata = JSON.parse(mydata);
console.log(mydata);
</script>

After rendering, the following output is produced:

var mydata = {"user": {"firstName": "Bob", "lastName": "Henderson"}};

However, when trying to parse `mydata` using `JSON.parse(mydata)`, a syntax error occurs on the JavaScript side. How can I successfully parse the string into a JavaScript object?

Answer №1

When working with JavaScript, remember to follow this code block

<script>
  var data = JSON.parse("{{formData|escapejs}}");
  console.log(data);
</script

Answer №2

The content of the variable mydata is in the form of a valid JavaScript object and does not need to be parsed as a string:

var mydata ={"user":{"firstName":"Bob","lastName":"Henderson",}};

You can easily access properties like: mydata.user.firstName

Furthermore, it's important to validate the JSON data stored in your model. The example provided contains an error due to the presence of a trailing comma, which is not allowed in JSON formatting.

Answer №3

According to @Arsh Singh's suggestion, the variable formrecord.data is not a valid JSON format, but it is a valid Python dictionary. You can handle it like this:

# views
import json

def myview(request, uid):
    formrecord = FormData.objects.get(someid=uid)
    jsondata = json.dumps(formrecord.data)
    return render(request, 'myview.html', {'formdata': jsondata})

Next, in the JavaScript block:

<script>
  var mydata = {{ formdata }};
  console.log(mydata);
</script>

Answer №4

To ensure proper rendering in your JS file, make sure to include the `|safe' filter as depicted below:

views

import json

def myview(request, uid):
    formrecord = FormData.objects.get(someid = uid)
    jsondata = json.dumps(formrecord.data)
    return render(request, 'myview.html', {'formdata':jsondata})

Next, in the JavaScript block:

<script>
  var mydata ={{ formdata|safe }};
  console.log(mydata);
</script>

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