confine exclusion to wizard fields

lib/custom_wizard/wizard.rb

@@ -250,7 +250,18 @@ class CustomWizard::Wizard
 
   def filter_conditional_fields(submission)
     included_fields = steps.map { |s| s.fields.map { |f| f.id } }.flatten
-    submission.select { |key, _| included_fields.include?(key) }
+    submission.select do |key, _|
+      included_fields.include?(key) ||
+      required_fields.include?(key) ||
+      key.include?("action")
+    end
+  end
+
+  def required_fields
+    %w{
+      submitted_at
+      route_to
+    }
   end
 
   def final_cleanup!

spec/requests/custom_wizard/steps_controller_spec.rb

@@ -249,4 +249,41 @@ describe CustomWizard::StepsController do
     expect(response.status).to eq(200)
     expect(response.parsed_body['final']).to eq(true)
   end
+
+  it "excludes the non-included conditional fields from the submissions" do
+    new_template = wizard_template.dup
+    new_template['steps'][1]['fields'][0]['condition'] = wizard_field_condition_template['condition']
+    CustomWizard::Template.save(new_template, skip_jobs: true)
+
+    put '/w/super-mega-fun-wizard/steps/step_1.json', params: {
+      fields: {
+        step_1_field_1: "Condition will pass"
+      }
+    }
+
+    put '/w/super-mega-fun-wizard/steps/step_2.json', params: {
+      fields: {
+        step_2_field_1: "1995-04-23"
+      }
+    }
+
+    put '/w/super-mega-fun-wizard/steps/step_1.json', params: {
+      fields: {
+        step_1_field_1: "Condition will not pass"
+      }
+    }
+    wizard_id = response.parsed_body['wizard']['id']
+    wizard = CustomWizard::Wizard.create(wizard_id, user)
+    submission = wizard.submissions.last
+    expect(submission.keys).to include("step_2_field_1")
+
+    put '/w/super-mega-fun-wizard/steps/step_2.json', params: {
+      fields: {
+        step_2_field_1: "1995-04-23"
+      }
+    }
+    wizard = CustomWizard::Wizard.create(wizard_id, user)
+    submission = wizard.submissions.last
+    expect(submission.keys).not_to include("step_2_field_1")
+  end
 end