Handle page id's that are Fixnums (#2033)

* chore: failing test case for #2032

* fix: Use `to_s.to_sym` for page_id’s in the store since they can be Fixnum’s

* chore: delete stale queryable-app fixture

middleman-core/features/page-id.feature

@@ -11,6 +11,7 @@ Feature: Page IDs
     And I should see 'URL5: <a href="/implicit.html">Imp</a>'
     And I should see 'URL6: <a href="/folder/foldern.html">Foldern</a>'
     And I should see 'URL7: <a href="/feed.xml">Feed</a>'
+    And I should see "URL8: /fourty-two.html"
 
     When I go to "/fm.html"
     Then I should see "I am: frontmatter"
@@ -45,9 +46,10 @@ Feature: Page IDs
     And I should see "URL2: /2.html"
     And I should see 'URL3: <a href="/3.html">Hi</a>'
     And I should see 'URL4: <a href="/overwrites/from-default.html">Sym</a>'
-    And I should see 'URL8: <a href="/implicit.html">Imp</a>'
-    And I should see 'URL9: <a href="/folder/foldern.html">Foldern</a>'
-    And I should see 'URL10: <a href="/feed.xml">Feed</a>'
+    And I should see "URL8: /fourty-two.html"
+    And I should see 'URL9: <a href="/implicit.html">Imp</a>'
+    And I should see 'URL10: <a href="/folder/foldern.html">Foldern</a>'
+    And I should see 'URL11: <a href="/feed.xml">Feed</a>'
 
     When I go to "/fm.html"
     Then I should see "I am: frontmatter"

middleman-core/fixtures/page-id-app/source/fourty-two.html.erb

@@ -0,0 +1,5 @@
+---
+id: 42
+---
+
+I am: <%= current_resource.page_id %>

middleman-core/fixtures/page-id-app/source/index.html.erb

@@ -7,8 +7,9 @@ URL4: <%= link_to "Sym", :"something-else" %>
 URL5: <%= link_to "Imp", :implicit %>
 URL6: <%= link_to "Foldern", "folder/foldern" %>
 URL7: <%= link_to "Feed", "feed.xml" %>
+URL8: <%= url_for "42" %>
 
 <%# If custom proc %>
-URL8: <%= link_to "Imp", "implicit.html-foo" %>
-URL9: <%= link_to "Foldern", "folder/foldern.html-foo" %>
-URL10: <%= link_to "Feed", "feed.xml-foo" %>
+URL9: <%= link_to "Imp", "implicit.html-foo" %>
+URL10: <%= link_to "Foldern", "folder/foldern.html-foo" %>
+URL11: <%= link_to "Feed", "feed.xml-foo" %>

middleman-core/fixtures/queryable-app/source/2010-08-08-test-document-file.html.markdown

@@ -1,8 +0,0 @@
----
-id: 1
-title: Some fancy title
-tags: [ruby]
-status: :published
----
-
-I like being the demo text.

middleman-core/fixtures/queryable-app/source/2010-08-09-another-test-document.html.markdown

@@ -1,10 +0,0 @@
----
-id: 2
-title: Another title, that's for sure
-tags: [ruby, rails]
-special_attribute: Yes!
-friends: [Anton, Paul]
-status: :published
----
-
-The body copy.

middleman-core/fixtures/queryable-app/source/2011-12-26-some-test-document.html.markdown

@@ -1,6 +0,0 @@
----
-id: 5
-title: Some test document
----
-
-This is just some test document.

middleman-core/fixtures/queryable-app/source/document_with_date_in_yaml.html.markdown

@@ -1,7 +0,0 @@
----
-id: 3
-title: Document with date in YAML
-date: 2011-04-05
----
-
-This document has no date in the filename, but in the YAML front matter.

middleman-core/fixtures/queryable-app/source/document_without_date.html.markdown

@@ -1,7 +0,0 @@
----
-id: 4
-title: This document has no date
-seldom_attribute: is seldom
----
-
-This document has no date at all.

middleman-core/lib/middleman-core/sitemap/store.rb

@@ -163,7 +163,7 @@ module Middleman
       def find_resource_by_page_id(page_id)
         @lock.synchronize do
           ensure_resource_list_updated!
-          @_lookup_by_page_id[page_id.to_sym]
+          @_lookup_by_page_id[page_id.to_s.to_sym]
         end
       end
 
@@ -249,7 +249,7 @@ module Middleman
                 # since some proxy resources are looked up by path in order to
                 # get their metadata and subsequently their page_id.
                 @resources.each do |resource|
-                  @_lookup_by_page_id[resource.page_id.to_sym] = resource
+                  @_lookup_by_page_id[resource.page_id.to_s.to_sym] = resource
                 end
 
                 invalidate_resources_not_ignored_cache!