Fix assignment hash value with string keys to range filter

lib/datagrid/filters/ranged_filter.rb

@@ -46,7 +46,7 @@ def default_filter_where(scope, value)
       protected
 
       def parse_hash(result)
-        to_range(result[:from], result[:to])
+        to_range(result[:from] || result["from"], result[:to] || result["to"])
       end
 
       def to_range(from, to, exclusive = false)

spec/datagrid/filters/date_filter_spec.rb

@@ -54,14 +54,22 @@
     to = 3.days.ago
     report.created_at = { from: from, to: to }
     expect(report.created_at).to eq(from.to_date..to.to_date)
+
+    report.created_at = { "from" => from, "to" => to }
+    expect(report.created_at).to eq(from.to_date..to.to_date)
+
     report.created_at = {}
     expect(report.created_at).to eq(nil)
+
     report.created_at = { from: nil, to: nil }
     expect(report.created_at).to eq(nil)
+
     report.created_at = { from: Date.today, to: nil }
     expect(report.created_at).to eq(Date.today..nil)
+
     report.created_at = { from: nil, to: Date.today }
     expect(report.created_at).to eq(nil..Date.today)
+
     report.created_at = { from: Time.now, to: Time.now }
     expect(report.created_at).to eq(Date.today..Date.today)
   end

version-2/Readme.markdown

@@ -483,7 +483,7 @@ end
 
 ## Introduced range filter separator localization
 
-A separator symbol between range filter inputs is now a part of localizations to avoid hardcore.
+A separator symbol between range filter inputs is now a part of localizations to avoid hard coding.
 Add `datagrid.filters.range.separator` to your localization file.
 
 [See related view](https://github.com/bogdan/datagrid/blob/version-2/app/views/datagrid/_range_filter.html.erb#L2)