Merge pull request #1904 from codidact/0valt/1902/query_url

query_url helper should correctly rebuild merged query

Author: Oaphi

app/helpers/application_helper.rb

@@ -48,7 +48,7 @@ def check_your_privilege(privilege)
   end
 
   ##
-  # Utility to add additional query parameters to a URI.
+  # Adds additional query parameters to a URI.
   # @param base_url [String, nil] A base URI to which to add parameters. If none is specified then the request URI for
   #   the current page will be used.
   # @param params [Hash{#to_s => #to_s}] A hash of query parameters to add to the URI.
@@ -65,7 +65,7 @@ def query_url(base_url = nil, **params)
     end
 
     query = query.merge(params.to_h { |k, v| [k.to_s, v.to_s] })
-    uri.query = query.map { |k, v| "#{k}=#{v}" }.join('&')
+    uri.query = Rack::Utils.build_nested_query(query)
     uri.to_s
   end