From 441967510f58f9580b219c0a39d27d8c8cba3016 Mon Sep 17 00:00:00 2001
From: Dominik Richter <dominik.richter@gmail.com>
Date: Wed, 5 Oct 2016 13:03:28 +0200
Subject: [PATCH] bugfix: support nil entries in filter table

---
 lib/utils/filter.rb                  |  1 +
 test/unit/utils/filter_table_test.rb | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/lib/utils/filter.rb b/lib/utils/filter.rb
index 80716df1f..74980b9ca 100644
--- a/lib/utils/filter.rb
+++ b/lib/utils/filter.rb
@@ -44,6 +44,7 @@ module FilterTable
     def initialize(resource, params, filters)
       @resource = resource
       @params = params
+      @params = [] if @params.nil?
       @filters = filters
     end
 
diff --git a/test/unit/utils/filter_table_test.rb b/test/unit/utils/filter_table_test.rb
index c8c1dbc04..aaff04b1f 100644
--- a/test/unit/utils/filter_table_test.rb
+++ b/test/unit/utils/filter_table_test.rb
@@ -28,6 +28,16 @@ describe FilterTable do
     factory.must_be_kind_of FilterTable::Factory
   end
 
+  it 'supports empty arrays' do
+    factory.add_accessor(:where).add(:baz).connect(resource, :data)
+    resource.new([]).where { false }.params.must_equal []
+  end
+
+  it 'supports nil arrays' do
+    factory.add_accessor(:where).add(:baz).connect(resource, :data)
+    resource.new(nil).where { false }.params.must_equal []
+  end
+
   it 'retrieves the resource from all entries' do
     factory.add_accessor(:where)
            .add(:baz?) { |x| x.resource }