allow nested attrs

app/controllers/admin/university/person/alumni_controller.rb

@@ -45,6 +45,7 @@ class Admin::University::Person::AlumniController < Admin::University::Applicati
   end
 
   def alumnus_params
+    # TODO: Permit nested attrs
     params.require(:university_person_alumnus)
           .permit()
   end

app/models/university/person/with_education.rb

@@ -25,6 +25,10 @@ module University::Person::WithEducation
                             foreign_key: 'university_person_id',
                             association_foreign_key: 'education_cohort_id'
 
+    accepts_nested_attributes_for :cohorts,
+                                  reject_if: :all_blank,
+                                  allow_destroy: true
+
     # Dénormalisation des liens via cohorts, pour la recherche par facettes
     has_and_belongs_to_many :diploma_years,
                             class_name: 'Education::AcademicYear',