limits the length of debates.title to 80 in the db

db/migrate/20150806111435_change_debates_title_length.rb

@@ -0,0 +1,5 @@
+class ChangeDebatesTitleLength < ActiveRecord::Migration
+  def change
+    change_column :debates, :title, :string, limit: 80
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150731110702) do
+ActiveRecord::Schema.define(version: 20150806111435) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -34,11 +34,11 @@ ActiveRecord::Schema.define(version: 20150731110702) do
   add_index "comments", ["user_id"], name: "index_comments_on_user_id", using: :btree
 
   create_table "debates", force: :cascade do |t|
-    t.string   "title"
+    t.string   "title",       limit: 80
     t.text     "description"
     t.integer  "author_id"
-    t.datetime "created_at",  null: false
+    t.datetime "created_at",             null: false
-    t.datetime "updated_at",  null: false
+    t.datetime "updated_at",             null: false
   end
 
   create_table "taggings", force: :cascade do |t|