lib/nanoc3/helpers/link_to.rb in nanoc3-3.2.0a1 vs lib/nanoc3/helpers/link_to.rb in nanoc3-3.2.0a2

@@ -45,11 +45,16 @@
     #
     #   link_to('Blog', '/blog/', :title => 'My super cool blog')
     #   # => '<a title="My super cool blog" href="/blog/">Blog</a>'
     def link_to(text, target, attributes={})
       # Find path
-      path = target.is_a?(String) ? target : target.path
+      if target.is_a?(String)
+        path = target
+      else
+        path = target.path
+        raise RuntimeError, "Cannot create a link to #{target.inspect} because this target is not outputted (its routing rule returns nil)" if path.nil?
+      end
 
       # Join attributes
       attributes = attributes.inject('') do |memo, (key, value)|
         memo + key.to_s + '="' + h(value) + '" '
       end
@@ -110,17 +115,23 @@
     #   # => '../qux/'
     def relative_path_to(target)
       require 'pathname'
 
       # Find path
-      path = target.is_a?(String) ? target : target.path
+      if target.is_a?(String)
+        path = target
+      else
+        path = target.path
+        raise RuntimeError, "Cannot get the relative path to #{target.inspect} because this target is not outputted (its routing rule returns nil)" if path.nil?
+      end
 
       # Get source and destination paths
       dst_path   = Pathname.new(path)
+      raise RuntimeError, "Cannot get the relative path to #{path} because the current item representation, #{@item_rep.inspect}, is not outputted (its routing rule returns nil)" if @item_rep.path.nil?
       src_path   = Pathname.new(@item_rep.path)
 
-      # Calculate elative path (method depends on whether destination is a
-      # directory or not).
+      # Calculate the relative path (method depends on whether destination is
+      # a directory or not).
       if src_path.to_s[-1,1] != '/'
         relative_path = dst_path.relative_path_from(src_path.dirname).to_s
       else
         relative_path = dst_path.relative_path_from(src_path).to_s
       end