Ensure we're not interpolating an object

lib/custom_wizard/mapper.rb

@@ -44,7 +44,7 @@ class CustomWizard::Mapper
 
   def initialize(params)
     @inputs = params[:inputs] || {}
-    @data = params[:data] || {}
+    @data = params[:data].with_indifferent_access || {}
     @user = params[:user]
     @opts = params[:opts] || {}
   end
@@ -267,7 +267,12 @@ class CustomWizard::Mapper
     return nil if data.nil?
     k = keys.shift
     result = data[k]
-    keys.empty? ? result : self.recurse(result, keys)
+
+    if keys.empty?
+      result.is_a?(Object) ? "" : result
+    else
+      self.recurse(result, keys)
+    end
   end
 
   def bool(value)

spec/components/custom_wizard/mapper_spec.rb

@@ -58,6 +58,11 @@ describe CustomWizard::Mapper do
       "step_1_field_3" => "Value"
     }
   }
+  let(:template_params_object) {
+    {
+      "step_1_field_1": get_wizard_fixture("field/upload")
+    }
+  }
 
   def create_template_mapper(data, user)
     CustomWizard::Mapper.new(
@@ -448,6 +453,40 @@ describe CustomWizard::Mapper do
         expect(result).to eq(template)
       end
 
+      it "handles correct object variable references" do
+        template = <<-LIQUID.strip
+          {%- if "w{step_1_field_1.id}" == "step_2_field_7" -%}
+            Correct
+          {%- else -%}
+            Incorrect
+          {%-endif-%}
+        LIQUID
+        mapper = create_template_mapper(template_params_object, user1)
+        result = mapper.interpolate(
+          template.dup,
+          template: true,
+          wizard: true
+        )
+        expect(result).to eq("Correct")
+      end
+
+      it "handles incorrect object variable references" do
+        template = <<-LIQUID.strip
+          {%- if "w{step_1_field_1}" == "step_2_field_7" -%}
+            Correct
+          {%- else -%}
+            Incorrect
+          {%-endif-%}
+        LIQUID
+        mapper = create_template_mapper(template_params_object, user1)
+        result = mapper.interpolate(
+          template.dup,
+          template: true,
+          wizard: true
+        )
+        expect(result).to eq("Incorrect")
+      end
+
       context "custom filter: 'first_non_empty'" do
         it "gives first non empty element from list" do
           template = <<-LIQUID.strip