Merge branch 'fixes/cannot-create-semester-process' into 'develop'

Bug: can't create SemesterProcess

See merge request !846

app/controllers/semester_processes_controller.rb

@@ -36,7 +36,7 @@ class SemesterProcessesController < ApplicationController
       mail_subject_template: semester_process_params[:subject]
     )
 
-    @semester_process.build_semester_volunteers(@volunteers, selected_volunteers: selected_volunteers)
+    @semester_process.build_semester_volunteers(@volunteers, selected_volunteers)
     @semester_process.build_volunteers_hours_feedbacks_and_mails
 
     if @semester_process.save

app/models/semester_process.rb

@@ -69,7 +69,7 @@ class SemesterProcess < ApplicationRecord
   end
 
   def build_semester_volunteers(volunteers, selected = nil)
-    volunteers = volunteers.where(id: selected) if selected
+    volunteers = volunteers.select{ |volunteer| selected.include? volunteer.id } if selected && selected.any? 
     semester_process_volunteers << volunteers.to_a.map do |volunteer|
       spv = SemesterProcessVolunteer.new(volunteer: volunteer, selected: false)
       spv.build_missions(semester)