allow for configuration of selected attributes

.gitignore

@@ -3,4 +3,5 @@
 coverage
 rdoc
 pkg
-*.sqlite3
+*.sqlite3
+*.log

lib/acts_as_stripped.rb

@@ -4,7 +4,10 @@ def self.included(base)
   end
 
   module ClassMethods
-    def acts_as_stripped
+    def acts_as_stripped(*attrs)
+      class_inheritable_accessor :acts_as_stripped_attributes
+      self.acts_as_stripped_attributes = attrs if attrs.any?
+
       before_validation :strip_fields
 
       include ActsAsStripped::InstanceMethods
@@ -18,7 +21,12 @@ module SingletonMethods
   module InstanceMethods
     private
     def strip_fields
-      self.attributes.each_key {|a| self[a].strip! if self[a].respond_to? :strip! }
+      strippable_attributes.each do |attr|
+        self[attr.to_s].strip!
+      end
+    end
+    def strippable_attributes
+      self.acts_as_stripped_attributes || self.attributes.keys.select {|attr| self[attr].respond_to?(:strip!) }
     end
   end
 end

test/acts_as_stripped_test.rb

@@ -4,25 +4,49 @@
   create_table :users, :force => true do |t|
     t.column :first_name, :string
     t.column :last_name, :string
+    t.column :logged_in_at, :datetime
+  end
+  create_table :posts, :force => true do |t|
+    t.column :title, :string
+    t.column :body, :string
   end
 end
 
 class User < ActiveRecord::Base
   acts_as_stripped
 end
 
+class Post < ActiveRecord::Base
+  acts_as_stripped :title
+end
+
 class ActsAsStrippedTest < Test::Unit::TestCase
   context 'a basic user instance' do
     setup do
       @user = User.new
     end
-    should "strips all attributes of extra whitespace" do
+    should "strips all string attributes of extra whitespace" do
       @user.first_name = '  ryan  '
       @user.last_name = '  sonnek  '
+      @user.logged_in_at = Time.now
 
       @user.save!
       assert_equal 'ryan', @user.first_name
       assert_equal 'sonnek', @user.last_name
     end
   end
+
+  context 'a basic post instance' do
+    setup do
+      @post = Post.new
+    end
+    should 'strip whitespace only from title' do
+      @post.title = '  hello world  '
+      @post.body = '  awesome  '
+      @post.save!
+
+      assert_equal 'hello world', @post.title
+      assert_equal '  awesome  ', @post.body
+    end
+  end
 end

test/debug.log

@@ -75,3 +75,184 @@
 
   SQL (0.4ms)   SELECT version FROM "schema_migrations"
   User Create (0.6ms)   INSERT INTO "users" ("last_name", "first_name") VALUES('sonnek', 'ryan')
+  SQL (0.6ms)   select sqlite_version(*)
+  SQL (0.4ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (2.5ms)   CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "first_name" varchar(255), "last_name" varchar(255)) 
+  SQL (0.5ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (2.1ms)   CREATE TABLE "posts" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "body" varchar(255)) 
+  SQL (2.2ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (2.2ms)   CREATE TABLE "schema_migrations" ("version" varchar(255) NOT NULL) 
+  SQL (2.3ms)   CREATE UNIQUE INDEX "unique_schema_migrations" ON "schema_migrations" ("version")
+  SQL (0.6ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (0.3ms)   SELECT version FROM "schema_migrations"
+  SQL (2.2ms)   INSERT INTO "schema_migrations" (version) VALUES ('1')
+  SQL (0.6ms)   select sqlite_version(*)
+  SQL (1.0ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (3.1ms)   DROP TABLE "users"
+  SQL (2.3ms)   CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "first_name" varchar(255), "last_name" varchar(255)) 
+  SQL (0.8ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (2.0ms)   DROP TABLE "posts"
+  SQL (2.1ms)   CREATE TABLE "posts" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "body" varchar(255)) 
+  SQL (0.9ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (0.5ms)   SELECT version FROM "schema_migrations"
+  Post Create (0.8ms)   INSERT INTO "posts" ("title", "body") VALUES('hello world', ' awesome ')
+  User Create (0.6ms)   INSERT INTO "users" ("last_name", "first_name") VALUES(' sonnek ', ' ryan ')
+  SQL (0.6ms)   select sqlite_version(*)
+  SQL (0.9ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (3.7ms)   DROP TABLE "users"
+  SQL (2.3ms)   CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "first_name" varchar(255), "last_name" varchar(255)) 
+  SQL (0.7ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (2.8ms)   DROP TABLE "posts"
+  SQL (2.5ms)   CREATE TABLE "posts" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "body" varchar(255)) 
+  SQL (1.0ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (0.4ms)   SELECT version FROM "schema_migrations"
+  Post Create (0.6ms)   INSERT INTO "posts" ("title", "body") VALUES('hello world', ' awesome ')
+  SQL (0.6ms)   select sqlite_version(*)
+  SQL (1.0ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (3.4ms)   DROP TABLE "users"
+  SQL (1.9ms)   CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "first_name" varchar(255), "last_name" varchar(255)) 
+  SQL (1.0ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (2.2ms)   DROP TABLE "posts"
+  SQL (2.5ms)   CREATE TABLE "posts" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "body" varchar(255)) 
+  SQL (1.0ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (0.5ms)   SELECT version FROM "schema_migrations"
+  Post Create (0.9ms)   INSERT INTO "posts" ("title", "body") VALUES('hello world', ' awesome ')
+  SQL (0.6ms)   select sqlite_version(*)
+  SQL (0.9ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (3.2ms)   DROP TABLE "users"
+  SQL (2.5ms)   CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "first_name" varchar(255), "last_name" varchar(255)) 
+  SQL (0.8ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (2.7ms)   DROP TABLE "posts"
+  SQL (2.3ms)   CREATE TABLE "posts" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "body" varchar(255)) 
+  SQL (0.8ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (0.4ms)   SELECT version FROM "schema_migrations"
+  Post Create (0.6ms)   INSERT INTO "posts" ("title", "body") VALUES('hello world', ' awesome ')
+  User Create (1.1ms)   INSERT INTO "users" ("last_name", "first_name") VALUES(' sonnek ', ' ryan ')
+  SQL (0.7ms)   select sqlite_version(*)
+  SQL (0.9ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (3.4ms)   DROP TABLE "users"
+  SQL (2.1ms)   CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "first_name" varchar(255), "last_name" varchar(255)) 
+  SQL (0.6ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (2.1ms)   DROP TABLE "posts"
+  SQL (2.6ms)   CREATE TABLE "posts" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "body" varchar(255)) 
+  SQL (0.7ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (0.4ms)   SELECT version FROM "schema_migrations"
+  Post Create (0.6ms)   INSERT INTO "posts" ("title", "body") VALUES('hello world', ' awesome ')
+  User Create (0.5ms)   INSERT INTO "users" ("last_name", "first_name") VALUES('sonnek', 'ryan')
+  SQL (0.6ms)   select sqlite_version(*)
+  SQL (0.9ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (3.5ms)   DROP TABLE "users"
+  SQL (2.4ms)   CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "first_name" varchar(255), "last_name" varchar(255)) 
+  SQL (0.8ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (2.6ms)   DROP TABLE "posts"
+  SQL (2.3ms)   CREATE TABLE "posts" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "body" varchar(255)) 
+  SQL (1.8ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (1.0ms)   SELECT version FROM "schema_migrations"
+  Post Create (1.0ms)   INSERT INTO "posts" ("title", "body") VALUES('hello world', ' awesome ')
+  User Create (0.6ms)   INSERT INTO "users" ("last_name", "first_name") VALUES('sonnek', 'ryan')
+  SQL (0.7ms)   select sqlite_version(*)
+  SQL (1.0ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (3.3ms)   DROP TABLE "users"
+  SQL (2.1ms)   CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "first_name" varchar(255), "last_name" varchar(255), "logged_in_at" datetime) 
+  SQL (0.6ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (2.8ms)   DROP TABLE "posts"
+  SQL (2.2ms)   CREATE TABLE "posts" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "body" varchar(255)) 
+  SQL (1.0ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (0.4ms)   SELECT version FROM "schema_migrations"
+  Post Create (0.6ms)   INSERT INTO "posts" ("title", "body") VALUES('hello world', ' awesome ')
+  User Create (0.6ms)   INSERT INTO "users" ("last_name", "logged_in_at", "first_name") VALUES('sonnek', NULL, 'ryan')
+  SQL (0.6ms)   select sqlite_version(*)
+  SQL (1.0ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (3.3ms)   DROP TABLE "users"
+  SQL (2.3ms)   CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "first_name" varchar(255), "last_name" varchar(255), "logged_in_at" datetime) 
+  SQL (0.7ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (3.4ms)   DROP TABLE "posts"
+  SQL (2.5ms)   CREATE TABLE "posts" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "body" varchar(255)) 
+  SQL (0.9ms)    SELECT name
+ FROM sqlite_master
+ WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+
+  SQL (0.4ms)   SELECT version FROM "schema_migrations"
+  Post Create (0.6ms)   INSERT INTO "posts" ("title", "body") VALUES('hello world', ' awesome ')
+  User Create (0.6ms)   INSERT INTO "users" ("last_name", "logged_in_at", "first_name") VALUES('sonnek', '2009-06-25 10:15:33', 'ryan')