Sets the max length of tags to 40 chars in the db

db/migrate/20150909153455_set_tag_name_limit.rb

@@ -0,0 +1,5 @@
+class SetTagNameLimit < ActiveRecord::Migration
+  def change
+    change_column :tags, :name, :string, limit: 40
+  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: 20150909142534) do
+ActiveRecord::Schema.define(version: 20150909153455) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -193,9 +193,9 @@ ActiveRecord::Schema.define(version: 20150909142534) do
   add_index "taggings", ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context", using: :btree
 
   create_table "tags", force: :cascade do |t|
-    t.string  "name"
-    t.integer "taggings_count", default: 0
-    t.boolean "featured",       default: false
+    t.string  "name",           limit: 40
+    t.integer "taggings_count",            default: 0
+    t.boolean "featured",                  default: false
   end
 
   add_index "tags", ["name"], name: "index_tags_on_name", unique: true, using: :btree