Messages Django dans une alerte
Documentation du tag
Renders django messages in a series a DSFR alerts
data_dict = {
    "is_collapsible" : "(Optional) Boolean, set to true to add a 'close' button for the alert (default: false)",
    "wrapper_classes": "(Optional) extra classes for the wrapper of the alerts (default `fr-my-4v`)",
    "extra_classes": "(Optional) extra classes for the alert."
}
All of the keys of the dict can be passed directly as named parameters of the tag.
Relevant extra_classes:
fr-alert--sm: small alert
See: https://docs.djangoproject.com/en/4.2/ref/contrib/messages/
By default, the following message level are mapped to the following alert types:
| Message level | DSFR alert type | 
|---|---|
DEBUG | 
info | 
INFO | 
info | 
SUCCESS | 
success | 
WARNING | 
warning | 
ERROR | 
error | 
There types are then concatenated with fr-alert-- to form the CSS classe in the template.
These classes can be modified by setting DSFR_MESSAGE_TAGS_CSS_CLASSES in your settings.py, like so:
from django.contrib import messages
DSFR_MESSAGE_TAGS_CSS_CLASSES = {
    messages.DEBUG: "error"
}
You can also use this setting to map custom custom message levels to alert types:
django.conf import global_settings
from django.contrib import messages
MESSAGE_TAGS = {
    50: "fatal"
}
DSFR_MESSAGE_TAGS_CSS_CLASSES = {
    messages.DEBUG: "debug",
    50: "warning"
}
With this setting, the following code:
messages.add_message(request, 50, "A serious error occurred.")
renders an alert with the following CSS class: fr-alert--warning.
Tag name: dsfr_django_messages
Usage:
    {% dsfr_django_messages data_dict %}
Exemples
Exemple 1
{'is_collapsible': True}
  Ceci est une information
Ceci est un succès
Ceci est un avertissement
Ceci est une erreur