Merge pull request #430 from chrisyuska/deprecated_fragment_cache_key

Replace deprecated fragment_cache_key for Rails 5.2 support

Author: kaspth

lib/jbuilder/jbuilder_template.rb

@@ -151,8 +151,8 @@ def _cache_key(key, options)
     name_options = options.slice(:skip_digest, :virtual_path)
     key = _fragment_name_with_digest(key, name_options)
 
-    if @context.respond_to?(:fragment_cache_key)
-      key = @context.fragment_cache_key(key)
+    if @context.respond_to?(:combined_fragment_cache_key)
+      key = @context.combined_fragment_cache_key(key)
     else
       key = url_for(key).split('://', 2).last if ::Hash === key
     end

test/jbuilder_template_test.rb

@@ -320,10 +320,10 @@ def assert_collection_rendered(result, context = nil)
     JBUILDER
   end
 
-  test "fragment caching uses fragment_cache_key" do
+  test "fragment caching uses combined_fragment_cache_key" do
     undef_context_methods :fragment_name_with_digest, :cache_fragment_name
 
-    @context.expects(:fragment_cache_key).with("cachekey")
+    @context.expects(:combined_fragment_cache_key).with("cachekey")
 
     jbuild <<-JBUILDER
       json.cache! "cachekey" do