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

lib/report/filter/base.rb

@@ -28,17 +28,16 @@ class Report::Filter
     # Filter::Project.dependent --> Filter::Issue
     # This could result in a UI where, if the Prject-filter was selected,
     # the Issue-filter automatically shows up.
-    def self.dependent(klass)
-      self.dependents << klass
+    # Arguments:
+    #  - any subclass of Reporting::Filter::Base which shall be the dependent filter
+    #    or nil, if you want to remove the dependent relationship
+    def self.dependent(*args)
+      @dependent = args.first unless args.empty?
+      @dependent
     end
 
-    def self.has_dependents?
-      @dependents && !@dependents.empty?
-    end
-
-    def self.dependents(*args)
-      @dependents ||= []
-      @dependents += args
+    def self.has_dependent?
+      !!@dependent
     end
 
     def self.cached(*args)
@@ -50,17 +49,17 @@ class Report::Filter
     # all_dependents computes the depentends of this filter and recursively
     # all_dependents of this class' dependents.
     def self.all_dependents
-      self.cached(:compute_injected_dependents)
+      self.cached(:compute_all_dependents)
     end
 
     def self.compute_all_dependents
-      if self.has_dependents?
-        self.dependents.inject(self.dependents) do |ary, dep|
-          ary + dep.injected_dependents
-        end.uniq
-      else
-        []
+      dependents = []
+      dep = dependent
+      while !dep.nil? do
+        dependents << dep
+        dep = dep.dependent
       end
+      dependents
     end
 
     def value=(val)

lib/widget/filters/multi_values.rb

@@ -11,8 +11,8 @@ class Widget::Filters::MultiValues < Widget::Filters::Base
                             :multiple => "multiple" }
                             # multiple will be disabled/enabled later by JavaScript anyhow.
                             # We need to specify multiple here because of an IE6-bug.
-        if filter_class.has_dependents?
-          dependents = filter_class.dependents.map {|d| d.underscore_name}.to_json
+        if filter_class.has_dependent?
+          dependents = filter_class.all_dependents.map {|d| d.underscore_name}.to_json
           select_options.merge! :"data-dependents" => dependents.gsub!('"', "'")
         end
         box = content_tag :select, select_options do