Django messages framework - django

Question

I'm looking to add Django messages in my form in order to display success message if my form is validated and error message if my form is not validated (missing field, data type error, ...)
My error message works perfectly well, but I don't overcome to display my success message in the next template when my form is valid.
This is my view :
def BirthCertificate_Form_unique_number(request) :
validity = []
submission = []
#User fill some fields
query_social_number = request.GET.get('social_number')
query_social_number_father = request.GET.get('social_number_father')
query_social_number_mother = request.GET.get('social_number_mother')
success = False
if request.method == 'POST':
form = BirthCertificateForm2(request.POST or None)
if form.is_valid() : # Vérification sur la validité des données
post = form.save()
messages.success(request, 'Le formulaire a été enregistré !')
return HttpResponseRedirect(reverse('BC_treated2', args=(messages,),kwargs={'id': post.id}))
else:
messages.error(request, "Le formulaire est invalide !")
elif request.method == 'GET':
form = BirthCertificateForm2()
parent1 = Person.objects.filter(social_number=query_social_number_father)
parent2 = Person.objects.filter(social_number=query_social_number_mother)
if query_social_number :
if Person.objects.filter(social_number = query_social_number).exists() == True :
individu = get_object_or_404(Person, social_number = query_social_number)
messages.success(request, 'Le numéro unique existe !')
form.fields['fk_parent1'].queryset = parent1
form.fields['fk_parent2'].queryset = parent2
form.fields['lastname'].initial = individu.lastname
form.fields['firstname'].initial = individu.firstname
form.fields['birthday'].initial = individu.birthday
form.fields['birthcity'].initial = individu.birthcity
form.fields['birthcountry'].initial = individu.birthcountry
form.fields['sex'].initial = individu.sex
form.fields['social_number'].initial = individu.social_number
elif Person.objects.filter(social_number = query_social_number).exists() == False :
validity = False
messages.error(request, "Le numéro unique est invalide !")
context = {
"form" : form,
"validity" : validity,
"submission" : submission
}
return render(request, 'BC_form2.html', context)
and in my html template :
{% for message in messages %}
<div class="alert {{ message.tags }} alert-dismissible" role="alert">
<button type="button" class="close" data-dismiss="alert" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
{{ message }}
</div>
{% endfor %}
How I could display the success message when my form is valid ?
EDIT :
My urls.py file :
from django.conf.urls import url
from . import views
urlpatterns = [
url(r'^BC_accueil$', views.BirthCertificate_Home, name="BChome"),
url(r'^formulaire$', views.BirthCertificate_Form, name = "BCform"),
url(r'^formulaire2$', views.BirthCertificate_Form_unique_number, name = "BCform2"),
url(r'^formulaire_traite/(?P<id>\d+)/$', views.BirthCertificate_Resume, name="BC_treated"),
url(r'^formulaire2_traite/(?P<id>\d+)/$', views.BirthCertificate_Resume_unique_number, name="BC_treated2"),
url(r'^BirthCertificate_PDF/(?P<id>\d+)/$', views.BirthCertificate_PDF, name="PDF"),
url(r'^not_found$', views.BirthCertificate_notfound, name="BCnotfound"),
]

Answer 1

You need to know one thing that, messages will execute only once. Why did you do
args=(messages, )
You can access those messages in BC_treated2 without passing it as args