Using Django's template filters within a JavaScript script to manipulate an object's attribute

Question

Using Django's template filters within a JavaScript script to manipulate an object's attribute

I am facing an issue where django's template filters are not working inside a js script when applied to an object's attribute.

When I use the following code, it results in a js SyntaxError:

<script>
    {{ obj.geometry.geojson | safe }}
</script>

However, if the filter is applied directly on the object itself, no error occurs:

<script>
    {{ obj | safe }}
</script>

The content of the GeoJson file mentioned above is as follows:

{ "type": "Polygon", "coordinates": [ [ [ 3, 36 ], ... }

I need to ensure that the quote character (") is not escaped into (") so that I can later use JSON.parse() to convert it from a string to an object.

javascript json django django-templates django-template-filters

Answer 1

Answer №1

To create a new GeoJson string and insert it into a template, follow the example below:

return render(
           request,
           'my_template.html',
           {'obj': obj, 'geo_json': json.dumps(obj.geometry.geojson)}
       )

Whenever you need to use GeoJson content, simply include it as shown below:

<script>
    {{ geo_json | safe }}
</script>

UPDATE:

You can also achieve this using context-processors or template-tags, but these methods may be complex and unnecessary...

Answer 2

To create a new GeoJson string and insert it into a template, follow the example below:

return render(
           request,
           'my_template.html',
           {'obj': obj, 'geo_json': json.dumps(obj.geometry.geojson)}
       )

Whenever you need to use GeoJson content, simply include it as shown below:

<script>
    {{ geo_json | safe }}
</script>

UPDATE:

You can also achieve this using context-processors or template-tags, but these methods may be complex and unnecessary...

Using Django's template filters within a JavaScript script to manipulate an object's attribute

Answer №1

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