updates the sp responsible_name when creating/editing a sp

app/models/spending_proposal.rb

@@ -36,6 +36,8 @@ class SpendingProposal < ActiveRecord::Base
 
   scope :for_render,             -> { includes(:geozone) }
 
+  before_validation :update_responsible_name
+
   def description
     super.try :html_safe
   end
@@ -120,4 +122,8 @@ class SpendingProposal < ActiveRecord::Base
     end
   end
 
+  def update_responsible_name
+    self.responsible_name = author.try(:username)
+  end
+
 end

spec/models/spending_proposal_spec.rb

@@ -261,4 +261,12 @@ describe SpendingProposal do
     end
   end
 
+  describe "responsible_name" do
+    it "gets updated with the user name" do
+      u = create(:user, username: "manolo")
+      sp = create(:spending_proposal, author: u)
+      expect(sp.responsible_name).to eq("manolo")
+    end
+  end
+
 end