Always stringify properties in all array filters

lib/liquid/standardfilters.rb

@@ -387,6 +387,7 @@ def sort(input, property = nil)
         end
       elsif ary.all? { |el| el.respond_to?(:[]) }
         begin
+          property = Utils.to_s(property)
           ary.sort { |a, b| nil_safe_compare(a[property], b[property]) }
         rescue TypeError
           raise_property_error(property)
@@ -416,6 +417,7 @@ def sort_natural(input, property = nil)
         end
       elsif ary.all? { |el| el.respond_to?(:[]) }
         begin
+          property = Utils.to_s(property)
           ary.sort { |a, b| nil_safe_casecmp(a[property], b[property]) }
         rescue TypeError
           raise_property_error(property)
@@ -503,6 +505,7 @@ def uniq(input, property = nil)
       elsif ary.empty? # The next two cases assume a non-empty array.
         []
       else
+        property = Utils.to_s(property)
         ary.uniq do |item|
           item[property]
         rescue TypeError
@@ -534,6 +537,7 @@ def reverse(input)
     # @liquid_syntax array | map: string
     # @liquid_return [array[untyped]]
     def map(input, property)
+      property = Utils.to_s(property)
       InputIterator.new(input, context).map do |e|
         e = e.call if e.is_a?(Proc)
 
@@ -563,6 +567,7 @@ def compact(input, property = nil)
       elsif ary.empty? # The next two cases assume a non-empty array.
         []
       else
+        property = Liquid::Utils.to_s(property)
         ary.reject do |item|
           item[property].nil?
         rescue TypeError
@@ -952,6 +957,8 @@ def default(input, default_value = '', options = {})
     # @liquid_syntax array | sum
     # @liquid_return [number]
     def sum(input, property = nil)
+      property = property.nil? ? nil : Utils.to_s(property)
+
       ary = InputIterator.new(input, context)
       return 0 if ary.empty?
 

lib/liquid/version.rb

@@ -2,5 +2,5 @@
 # frozen_string_literal: true
 
 module Liquid
-  VERSION = "5.8.1"
+  VERSION = "5.8.2"
 end

test/integration/standard_filter_test.rb

@@ -1281,6 +1281,17 @@ def test_sum_with_floats_and_indexable_map_values
     assert_template_result("0", "{{ input | sum: 'subtotal' }}", { "input" => input })
   end
 
+  def test_sum_with_non_string_property
+    input = [{ "true" => 1 }, { "1.0" => 0.2, "1" => -0.3 }, { "1..5" => 0.4 }]
+
+    assert_equal(1, @filters.sum(input, true))
+    assert_equal(0.2, @filters.sum(input, 1.0))
+    assert_equal(-0.3, @filters.sum(input, 1))
+    assert_equal(0.4, @filters.sum(input, (1..5)))
+    assert_equal(0, @filters.sum(input, nil))
+    assert_equal(0, @filters.sum(input, ""))
+  end
+
   private
 
   def with_timezone(tz)