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djangopython-3.xdjango-modeladmin

How to prevent Django ModelAdmin from stripping whitespaces?

so I've defined readonly_fields in Django ModelAdmin with a callable which looks like this:

class TestAdmin(admin.ModelAdmin):
    readonly_fields = ("test_field_with_whitespace",)

    def test_field_with_whitespace(self, obj):
        return '     Hello      World'

In the corresponding admin view the readonly field is shown as "Hello World" - so without the whitespaces.

What can I do to show the whitespaces?

Solution

  • This is nothing to do with the modeladmin. HTML itself strips all whitespace. If you need it to show precisely then you will need to wrap it in a <pre> tag - and since you are now sending HTML you need to mark it as safe to avoid autoescaping.

    from django.utils.safestring import mark_safe
...
return mark_safe('<pre>     Hello      World</pre>')