Adding manual view support to uniqueness validation

lib/couchrest/model/validations.rb

@@ -40,10 +40,17 @@ module CouchRest
         #     validates_uniqueness_of :title
         #   end
         #
-        # Asside from the standard options, a +:proxy+ parameter is also accepted if you would 
+        # Asside from the standard options, you can specify the name of the view you'd like
+        # to use for the search inside the +:view+ option. The following example would search
+        # for the code in side the +all+ view, useful for when +unique_id+ is used and you'd
+        # like to check before receiving a RestClient Conflict error:
+        #
+        #   validates_uniqueness_of :code, :view => 'all'
+        #
+        # A +:proxy+ parameter is also accepted if you would 
         # like to call a method on the document on which the view should be performed.
         #
-        # Examples:
+        # For Example:
         #
         #   # Same as not including proxy:
         #   validates_uniqueness_of :title, :proxy => 'class'

lib/couchrest/model/validations/uniqueness.rb

@@ -15,14 +15,17 @@ module CouchRest
 
 
         def validate_each(document, attribute, value)
-          unless @klass.has_view?("by_#{attribute}")
+          view_name = options[:view].nil? ? "by_#{attribute}" : options[:view]
+
+          unless @klass.has_view?(view_name)
+            raise "View #{document.class.name}.#{options[:view]} does not exist!" unless options[:view].nil?
             @klass.view_by attribute
           end
 
           # Determine the base of the search
           base = options[:proxy].nil? ? @klass : document.instance_eval(options[:proxy])
 
-          docs = base.view("by_#{attribute}", :key => value, :limit => 2, :include_docs => false)['rows']
+          docs = base.view(view_name, :key => value, :limit => 2, :include_docs => false)['rows']
           return if docs.empty?
 
           unless document.new?