Merge pull request #2359 from abroder/where-collection

features/collections.feature

@@ -94,3 +94,15 @@ Feature: Collections
     When I run jekyll build
     Then the _site directory should exist
     And I should see "First document's output: <p>Use <code>Jekyll.configuration</code> to build a full configuration for use w/Jekyll.</p>\n\n<p>Whatever: foo.bar</p>" in "_site/index.html"
+
+  Scenario: Filter documents by where
+    Given I have an "index.html" page that contains "{% assign items = site.methods | where: 'whatever','foo.bar' %}Item count: {{ items.size }}"
+    And I have fixture collections
+    And I have a "_config.yml" file with content:
+    """
+    collections:
+    - methods
+    """
+    When I run jekyll build
+    Then the _site directory should exist
+    And I should see "Item count: 1" in "_site/index.html"

lib/jekyll/filters.rb

@@ -185,9 +185,9 @@ module Jekyll
     # value - desired value
     #
     # Returns the filtered array of objects
-    def where(input, key, value)
+    def where(input, property, value)
       return input unless input.is_a?(Array)
-      input.select { |object| object[key] == value }
+      input.select { |object| item_property(object, property) == value }
     end
 
     # Sort an array of objects