keep permission of topic/synapse in sync with map its deferring to from beginning (#1053)

* Update topic.rb

* Update synapse.rb

app/models/synapse.rb

@@ -22,6 +22,7 @@ class Synapse < ApplicationRecord
     where(topic1_id: topic_id).or(where(topic2_id: topic_id))
   }
 
+  before_create :set_perm_by_defer
   after_update :after_updated
 
   delegate :name, to: :user, prefix: true
@@ -62,6 +63,12 @@ class Synapse < ApplicationRecord
     output += %(\n)
     output
   end
+  
+  protected
+  
+  def set_perm_by_defer
+    permission = defer_to_map.permission if defer_to_map
+  end
 
   def after_updated
     attrs = %w(desc category permission defer_to_map_id)

app/models/topic.rb

@@ -16,6 +16,7 @@ class Topic < ApplicationRecord
 
   belongs_to :metacode
 
+  before_create :set_perm_by_defer
   before_create :create_metamap?
   after_update :after_updated
 
@@ -134,6 +135,10 @@ class Topic < ApplicationRecord
 
   protected
 
+  def set_perm_by_defer
+    permission = defer_to_map.permission if defer_to_map
+  end
+
   def create_metamap?
     return unless (link == '') && (metacode.name == 'Metamap')