Django admin custom queryset for a custom action - django

Question

I am a bit lost on how to perform a specific queryset in django admin. Below are my models.
class People(models.Model):
first_name = models.CharField(max_length=30)
last_name = models.CharField(max_length=35)
phone_number = models.CharField(null=True, blank=True, max_length=15)
def __str__(self):
return self.first_name
class Meta:
verbose_name_plural = 'People'
class Group_and_message(models.Model):
name = models.CharField(max_length=30, null=True)
people = models.ManyToManyField(Person)
message_body = models.TextField(max_length=140)
updated = models.DateTimeField(auto_now=True, auto_now_add=False)
def __str__(self):
return self.name
In Admin, I have created a custom action.
def send_message(modeladmin, request,queryset):
pass
My question is to be able, when selecting a "group_and_message" object in the admin dashboard via the checkbox, be able to retrieve "id" and "phone_number" of the selected object so i can use it to perform "send_message" custom action.
Below is the equivalent of basic of a few queryset steps that showcase what i am trying to achieve(just for illustration purpose)
g = Group_and_message.objects.last() #self instead of last is what i want;
g1 = g.people.all()
g2 = g1.values_list("id","phone_number");
g3 = dict(g2)
The result gives me the "id" and "phone number".
Any help would be much appreciated.

Answer 1

You need to access the Group_and_message via the backwards relation. In this case for you, it should be group_and_message_set.
def send_message(modeladmin, request,queryset):
phone_map = dict(People.objects.filter(
group_and_message_set__in=queryset,
).distinct().values_list('id', 'phone_number'))
# Do something
class Group_and_messageAdmin(admin.ModelAdmin):
actions = ['send_message']
As an aside, you shouldn't have underscores in your model names. Rather than Group_and_message, it'd be more pythonic/django-like to use GroupMessage.