Display manytomany on list_display on Django

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I am trying to display some items in manytomany in the list display on Jango, but it is returning an error, follow the codes:

Models py.

class Apenso(models.Model):

usuario = models.ForeignKey(User, blank=True)
processo = models.OneToOneField(Processo, blank=True, default=None)
apensos = models.ManyToManyField(Processo, blank=True, default=None, related_name="Apensos")

def __unicode__(self):
   return unicode(self.apenso) or u''

admin py.

class ApensoAdmin(admin.ModelAdmin):
list_display = ('processo', 'get_apensos', 'usuario')
list_display_links = list_display
list_per_page = 30
search_fields = ('processo', 'requerente__nome')

show_change_link = False

def get_apensos(self):
    return ", ".join([str(p) for p in self.apenso.all()])

And the error displayed is:

Exception Value:    
get_apensos() takes exactly 1 argument (2 given)
python django

  • Man, basically he is complaining that two arguments were passed to the function "get_apensos()", when in fact he only expects one. Are you sure you’re breaking this part of the code?

  • I checked here, and there’s only get_attached to that part of the code, there’s nowhere else

1 answer

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Maybe you’re looking for something like:

def get_apensos(self, obj):
    return ", ".join([str(p) for p in obj.apensos.all()])

This is because I believe you want to list the appendages of the object instance Apenso, I’m sure?

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