Merge pull request #9788 from opf/fix/39561/whitelist-translation

[39561] Improve translation of whitelist error

config/locales/en.yml

@@ -647,7 +647,9 @@ en:
         attachment:
           attributes:
             content_type:
-              not_whitelisted: "is set to '%{value}', which is not whitelisted for uploading."
+              blank: "The content type of the file cannot be blank."
+              not_whitelisted: "The file was rejected by an automatic filter. '%{value}' is not whitelisted for upload."
+              format: "%{message}"
         capability:
           context:
             global: 'Global'

spec/requests/api/v3/attachments/attachment_resource_shared_examples.rb

@@ -299,7 +299,7 @@ shared_examples 'an APIv3 attachment resource', type: :request, content_type: :j
       let(:request_parts) { { metadata: metadata.to_json, wrongFileSection: file } }
 
       it_behaves_like 'constraint violation' do
-        let(:message) { "Content type #{I18n.t('activerecord.errors.messages.blank')}" }
+        let(:message) { "The content type of the file cannot be blank" }
       end
     end
 
@@ -586,7 +586,7 @@ shared_examples 'an APIv3 attachment resource', type: :request, content_type: :j
         let(:request_parts) { { metadata: metadata.to_json, wrongFileSection: file } }
 
         it_behaves_like 'constraint violation' do
-          let(:message) { "Content type #{I18n.t('activerecord.errors.messages.blank')}" }
+          let(:message) { "The content type of the file cannot be blank." }
         end
       end