Adding a Picklist property type. Retrieving the possible values from SF.

lib/dm-salesforce-adapter/connection.rb

@@ -18,6 +18,7 @@ def on_simple_outbound
     def initialize(username, password, wsdl_path, api_dir, organization_id = nil)
       @wrapper = SoapWrapper.new("SalesforceAPI", "Soap", wsdl_path, api_dir)
       @username, @password, @organization_id = URI.unescape(username), password, organization_id
+      @metadata = {}
       login
     end
     attr_reader :user_id, :user_details
@@ -89,6 +90,12 @@ def delete(keys)
       call_api(:delete, DeleteError, "deleting", keys)
     end
 
+    def metadata(sf_object_name)
+      with_reconnection do
+        @metadata[sf_object_name] ||= driver.describeSObject(SalesforceAPI::DescribeSObject.new(sf_object_name)).result
+      end
+    end
+
     private
 
     def driver

lib/dm-salesforce-adapter/property.rb

@@ -5,3 +5,4 @@ module Property
 
 require 'dm-salesforce-adapter/property/serial'
 require 'dm-salesforce-adapter/property/boolean'
+require 'dm-salesforce-adapter/property/picklist'

lib/dm-salesforce-adapter/property/picklist.rb

@@ -0,0 +1,14 @@
+module SalesforceAdapter::Property
+  class Picklist < ::DataMapper::Property::String
+    def values_for_picklist
+      @metadata ||= connection.metadata(model.salesforce_class)
+      @values ||= @metadata.fields.select { |f| f.name =~ /#{self.field}/i || f.name =~ /#{self.name.to_s}/i}.first.picklistValues rescue []
+      @values.map {|value| {:value => value.value, :label => value.label}}
+    end
+
+    private
+    def connection
+      model.repository.adapter.connection
+    end
+  end
+end