Migration fix, and model clean up

app/models/minerva/assignment.rb

@@ -1,5 +1,5 @@
 module Minerva
   class Assignment < ApplicationRecord
-    belongs_to :interface, :class_name => 'Minerva::Interface', optional: true
+    belongs_to :interface, optional: true
   end
 end

app/models/minerva/state.rb

@@ -1,19 +1,19 @@
 module Minerva
   class State < ApplicationRecord
-    
-    belongs_to :assignment, :class_name => 'Minerva::Assignment'
-    belongs_to :status, :class_name => 'Minerva::Status'
+
+    belongs_to :assignment
+    belongs_to :status
     belongs_to :role
     belongs_to :work
     belongs_to :user
-    
+
     belongs_to :creator, class_name: "Minerva::User"
-    
+
     before_destroy { |record| raise ActiveRecord::ReadOnlyRecord }
-    
+
     def readonly?
       # allow the creation, you can also use a more complex condition to allow updates under certain conditions
-      new_record? ? false : true 
+      new_record? ? false : true
     end
   end
 end

db/migrate/20181218183815_create_minerva_states.rb

@@ -5,8 +5,8 @@ def change
       t.integer :user_id
       t.integer :role_id
       t.integer :work_id
-      t.integer :minerva_assignment_id
-      t.integer :minerva_status_id
+      t.integer :assignment_id
+      t.integer :status_id
 
       t.timestamps
     end
@@ -15,9 +15,9 @@ def change
     add_index :minerva_states, :role_id
     add_index :minerva_states, :work_id
 
-    add_foreign_key :minerva_states, :minerva_assignments, column: :minerva_assignment_id
-    add_index :minerva_states, :minerva_assignment_id
-    add_foreign_key :minerva_states, :minerva_statuses, column: :minerva_status_id
-    add_index :minerva_states, :minerva_status_id
+    add_foreign_key :minerva_states, :minerva_assignments, column: :assignment_id
+    add_index :minerva_states, :assignment_id
+    add_foreign_key :minerva_states, :minerva_statuses, column: :status_id
+    add_index :minerva_states, :status_id
   end
 end

lib/minerva/version.rb

@@ -1,3 +1,3 @@
 module Minerva
-  VERSION = '0.1.22'
+  VERSION = '0.1.23'
 end