Fix nil Series_id for GetDocumentContent (#22038)

* Add series_id assignment to initial fetch from VBMS

* Wrap attribute assignment in feature toggle and added test case

app/models/document.rb

@@ -103,13 +103,21 @@ def self.from_efolder(hash, file_number)
   end
 
   def self.from_vbms_document(vbms_document, file_number)
-    new(type: type_from_vbms_type(vbms_document.doc_type),
-        alt_types: (vbms_document.alt_doc_types || []).map { |type| ALT_TYPES[type] },
-        received_at: vbms_document.received_at,
-        upload_date: vbms_document.upload_date,
-        vbms_document_id: vbms_document.document_id,
-        filename: vbms_document.filename,
-        file_number: file_number)
+    document = new(
+      type: type_from_vbms_type(vbms_document.doc_type),
+      alt_types: (vbms_document.alt_doc_types || []).map { |type| ALT_TYPES[type] },
+      received_at: vbms_document.received_at,
+      upload_date: vbms_document.upload_date,
+      vbms_document_id: vbms_document.document_id,
+      filename: vbms_document.filename,
+      file_number: file_number
+    )
+
+    if FeatureToggle.enabled?(:use_ce_api)
+      document.assign_attributes(series_id: vbms_document.series_id)
+    end
+
+    document
   end
 
   def self.type_id(type)

spec/models/document_spec.rb

@@ -232,6 +232,19 @@
         expect(subject.type).to eq("VA Form 20-0995 Supplemental Claim Application")
       end
     end
+
+    context "when use_ce_api Featuretoggle is enabled" do
+      before { FeatureToggle.enable!(:use_ce_api) }
+      let(:vbms_document) do
+        OpenStruct.new(
+          document_id: "1",
+          series_id: "2"
+        )
+      end
+      it "assigns the series_id" do
+        expect(subject.series_id).to eq("2")
+      end
+    end
   end
 
   context "content tests" do