Merge branch 'feature_engine_tear_out' of https://dev.finn.de/git/reporting-engine into feature_engine_tear_out

app/models/report/chainable.rb

@@ -21,7 +21,9 @@ class Report < ActiveRecord::Base
     end
 
     def self.base?
-      superclass == Chainable or self == Chainable
+      superclass == engine::Chainable or self == engine::Chainable or
+      superclass == Chainable or self == Chainable or
+      self == engine::Filter::Base or self == engine::GroupBy::Base
     end
 
     def self.base

app/models/report/filter/base.rb

@@ -84,8 +84,9 @@ class Report::Filter
       []
     end
 
-    def initialze(child = nil, options = {})
-      raise ArgumentError, "Child has to be a Filter." if child and not child.filter?
+    def initialize(child = nil, options = {})
+      # TODO: wtf?
+      #raise ArgumentError, "Child has to be a Filter." if child and not child.filter?
       @values = []
       super
     end

app/models/report/result.rb

@@ -1,4 +1,4 @@
-module Report::Result
+class Report::Result
   class Base
     attr_accessor :parent, :type, :important_fields
     attr_accessor :key

lib/big_decimal_patch.rb

@@ -13,4 +13,9 @@ module BigDecimalPatch
     ::String.send :include, self
     def to_d; ::BigDecimal.new(self) end
   end
+  
+  module NilClass
+    ::NilClass.send :include, self
+    def to_d; 0 end
+  end
 end