NodeController: autodetect custom node builder

releaf-content/app/controllers/releaf/content/nodes_controller.rb

@@ -18,6 +18,14 @@ def content_type_dialog
       end
     end
 
+    def builder_scopes
+      [node_builder_scope] + super
+    end
+
+    def node_builder_scope
+      [Releaf.mount_location.capitalize, "Nodes"].reject(&:empty?).join("::")
+    end
+
     def copy_dialog
       copy_move_dialog_common
     end

releaf-content/spec/controllers/releaf/content/nodes_controller_spec.rb

@@ -0,0 +1,20 @@
+require 'spec_helper'
+
+describe Releaf::Content::NodesController do
+  describe "#builder_scopes" do
+    it "adds node builder scope as first scope before default builder scopes" do
+      allow(subject).to receive(:node_builder_scope).and_return("xx")
+      expect(subject.builder_scopes).to eq(["xx", "Releaf::Content::Nodes"])
+    end
+  end
+
+  describe "#node_builder_scope" do
+    it "returns node builder scope within releaf mount location scope" do
+      allow(Releaf).to receive(:mount_location).and_return("admin")
+      expect(subject.node_builder_scope).to eq("Admin::Nodes")
+
+      allow(Releaf).to receive(:mount_location).and_return("")
+      expect(subject.node_builder_scope).to eq("Nodes")
+    end
+  end
+end