let date, datetime, and time accept implicit strings

CHANGELOG.md

@@ -8,12 +8,15 @@
   hash. The `ActiveInteraction::Input` still responds to all hash methods.
 - Implicit types are now supported for many filters:
   - `array` accepts `to_ary`
+  - `date` accepts `to_str`
+  - `datetime` accepts `to_str`
   - `decimal` accepts `to_int`
   - `float` accepts `to_int`
   - `hash` accepts `to_hash`
   - `integer` accepts `to_int`
   - `string` accepts `to_str`
   - `symbol` accepts `to_sym`
+  - `time` accepts `to_str`
 
 ## Upgrading
 

lib/active_interaction/filters/abstract_date_time_filter.rb

@@ -12,12 +12,11 @@ class AbstractDateTimeFilter < AbstractFilter
     private :_cast # rubocop:disable Style/AccessModifierDeclarations
 
     def cast(value, context)
-      case value
-      when String
-        convert(value, context)
-      when GroupedInput
+      if value.respond_to?(:to_str)
+        convert(value.to_str, context)
+      elsif value.is_a?(GroupedInput)
         convert(stringify(value), context)
-      when *klasses
+      elsif klasses.include?(value.class)
         value
       else
         super

spec/active_interaction/filters/date_filter_spec.rb

@@ -61,6 +61,20 @@
       end
     end
 
+    context 'with an implicit String' do
+      let(:value) do
+        Class.new do
+          def to_str
+            '2011-12-13'
+          end
+        end.new
+      end
+
+      it 'returns a Date' do
+        expect(result).to eql Date.parse(value)
+      end
+    end
+
     context 'with a GroupedInput' do
       let(:year) { 2012 }
       let(:month) { 1 }

spec/active_interaction/filters/date_time_filter_spec.rb

@@ -61,6 +61,20 @@
       end
     end
 
+    context 'with an implicit String' do
+      let(:value) do
+        Class.new do
+          def to_str
+            '2011-12-13T14:15:16+17:18'
+          end
+        end.new
+      end
+
+      it 'returns a DateTime' do
+        expect(result).to eql DateTime.parse(value)
+      end
+    end
+
     context 'with a GroupedInput' do
       let(:year) { 2012 }
       let(:month) { 1 }

spec/active_interaction/filters/time_filter_spec.rb

@@ -83,6 +83,20 @@
       end
     end
 
+    context 'with an implicit String' do
+      let(:value) do
+        Class.new do
+          def to_str
+            '2011-12-13 14:15:16 +1718'
+          end
+        end.new
+      end
+
+      it 'returns a Time' do
+        expect(result).to eql Time.parse(value)
+      end
+    end
+
     context 'with a GroupedInput' do
       let(:year) { 2012 }
       let(:month) { 1 }