List account types

Allow users of app to refer to this constant to show available submodels

app/models/plutus/account.rb

@@ -41,6 +41,16 @@ class Account < ActiveRecord::Base
 
     validates_presence_of :type
 
+    def self.types
+      [
+        ::Plutus::Asset,
+        ::Plutus::Equity,
+        ::Plutus::Expense,
+        ::Plutus::Liability,
+        ::Plutus::Revenue,
+      ]
+    end
+
     if Plutus.enable_tenancy
       include Plutus::Tenancy
     else

spec/models/account_spec.rb

@@ -7,6 +7,13 @@ module Plutus
 
     it { should_not be_valid }  # must construct a child type instead
 
+    describe ".types" do
+      it "lists the available types" do
+        expect(described_class.types).
+          to match_array([Asset, Equity, Expense, Liability, Revenue])
+      end
+    end
+
     describe "when using a child type" do
       let(:account) { FactoryGirl.create(:account, type: "Finance::Asset") }
       it { should be_valid }