Update accessible_by scope on enterprise, to read from permissions

app/models/enterprise.rb

@@ -162,14 +162,12 @@ class Enterprise < ActiveRecord::Base
     end
   }
 
-  # Return enterprises that participate in order cycles that user coordinates, sends to or receives from
+  # Return enterprises that the user manages and those that have granted P-OC to managed enterprises
   scope :accessible_by, lambda { |user|
     if user.has_spree_role?('admin')
       scoped
     else
-      with_order_cycles_outer.
-      where('order_cycles.id IN (?)', OrderCycle.accessible_by(user)).
-      select('DISTINCT enterprises.*')
+      where(id: OpenFoodNetwork::Permissions.new(user).order_cycle_enterprises)
     end
   }
 

spec/models/enterprise_spec.rb

@@ -560,20 +560,19 @@ describe Enterprise do
     end
 
     describe "accessible_by" do
-      it "shows only enterprises that are invloved in order cycles which are common to those managed by the given user" do
+      it "shows only managed enterprises and enterprises granting them P-OC" do
         user = create(:user)
         user.spree_roles = []
         e1 = create(:enterprise)
         e2 = create(:enterprise)
         e3 = create(:enterprise)
-        e4 = create(:enterprise)
         e1.enterprise_roles.build(user: user).save
-        oc = create(:simple_order_cycle, coordinator: e2, suppliers: [e1], distributors: [e3])
+        create(:enterprise_relationship, parent: e2, child: e1, permissions_list: [:add_to_order_cycle])
 
         enterprises = Enterprise.accessible_by user
-        enterprises.length.should == 3
-        enterprises.should include e1, e2, e3
-        enterprises.should_not include e4
+        enterprises.length.should == 2
+        enterprises.should include e1, e2
+        enterprises.should_not include e3
       end
 
       it "shows all enterprises for admin user" do