brenes · August 8, 2016 11:42 · Aug 8, 2016
diff --git a/application_controler.rb b/application_controler.rb
@@ -0,0 +1,24 @@
+# This code is an example to combine different variants from different reasons into the request.variant setting from Rails 4.1
+
+before_action :set_versions
+
+def set_versions
+  # First, we load all the variants from whatever our variant logic is (mobile support, tests ab, beta versions...)
+  variants = []
+  variants << params[:b].to_sym if params[:b]
+  variants << params[:a].to_sym if params[:a]
+
+  # Now, we combine the variants
+  combined_variants = []
+
+  variants.length.times do |i|
+    combined_variants << variants.combination(i+1).to_a
+  end
+
+  combined_variants = combined_variants.reverse.flatten(1)
+  combined_variants = combined_variants.map{|v| v.join("+").to_sym}
+
+  # and assign the request.variant
+  request.variant = combined_variants
+end
+