normalize article and category attributes (closes foodcoops#294)

Gemfile

@@ -41,6 +41,7 @@ gem 'resque'
 gem 'whenever', require: false # For defining cronjobs, see config/schedule.rb
 gem 'protected_attributes'
 gem 'ruby-units'
+gem 'attribute_normalizer'
 
 # we use the git version of acts_as_versioned, and need to include it in this Gemfile
 gem 'acts_as_versioned', git: 'git://github.com/technoweenie/acts_as_versioned.git'

Gemfile.lock

@@ -80,6 +80,7 @@ GEM
     acts_as_tree (1.6.1)
       activerecord (>= 3.0.0)
     arel (4.0.2)
+    attribute_normalizer (1.1.0)
     better_errors (1.1.0)
       coderay (>= 1.0.0)
       erubis (>= 2.6.6)
@@ -398,6 +399,7 @@ PLATFORMS
 DEPENDENCIES
   acts_as_tree
   acts_as_versioned!
+  attribute_normalizer
   better_errors
   binding_of_caller
   bootstrap-datepicker-rails

app/models/article.rb

@@ -45,6 +45,8 @@ class Article < ActiveRecord::Base
 
   # Replace numeric seperator with database format
   localize_input_of :price, :tax, :deposit
+  # Get rid of unwanted whitespace. {Unit#new} may even bork on whitespace.
+  normalize_attributes :name, :unit, :note, :manufacturer, :origin, :order_number
 
   scope :undeleted, -> { where(deleted_at: nil) }
   scope :available, -> { undeleted.where(availability: true) }

app/models/article_category.rb

@@ -10,6 +10,8 @@ class ArticleCategory < ActiveRecord::Base
   #   @return [Array<Article>] Articles with this category.
   has_many :articles
 
+  normalize_attributes :name, :description
+
   validates :name, :presence => true, :uniqueness => true, :length => { :in => 2..20 }
 
   before_destroy :check_for_associated_articles

config/initializers/attribute_normalizer.rb

@@ -0,0 +1,11 @@
+# config/initializers/attribute_normalizer.rb
+# @see https://github.com/mdeering/attribute_normalizer
+AttributeNormalizer.configure do |config|
+  # The default normalizers if no :with option or block is given is to apply the :strip and :blank normalizers (in that order).
+  # You can change this if you would like as follows:
+  # config.default_normalizers = :strip, :blank
+
+  # You can enable the attribute normalizers automatically if the specified attributes exist in your column_names. It will use
+  # the default normalizers for each attribute (e.g. config.default_normalizers)
+  # config.default_attributes = :name, :title
+end