2 files changed, 7 insertions, 1 deletions
diff --git a/scalding/src/main/scala/sandcrawler/CrossrefScorable.scala b/scalding/src/main/scala/sandcrawler/CrossrefScorable.scala
index babb4f9..baa1ca9 100644
--- a/scalding/src/main/scala/sandcrawler/CrossrefScorable.scala
+++ b/scalding/src/main/scala/sandcrawler/CrossrefScorable.scala
@@ -90,7 +90,7 @@ object CrossrefScorable {
             val doi = Scorable.getString(map, "DOI")
             val authors: List[String] = mapToAuthorList(map)
             val year: Int = mapToYear(map).getOrElse(0)
-            if (doi.isEmpty || doi == null) {
+            if (doi.isEmpty || doi == null || authors.length == 0) {
               MapFeatures(Scorable.NoSlug, json)
             } else {
               val sf : ScorableFeatures = ScorableFeatures.create(title=title, authors=authors, doi=doi.toLowerCase(), year=year)
diff --git a/scalding/src/test/scala/sandcrawler/CrossrefScorableTest.scala b/scalding/src/test/scala/sandcrawler/CrossrefScorableTest.scala
index ac7cc70..0cb12ee 100644
--- a/scalding/src/test/scala/sandcrawler/CrossrefScorableTest.scala
+++ b/scalding/src/test/scala/sandcrawler/CrossrefScorableTest.scala
@@ -73,6 +73,7 @@ class CrossrefScorableTest extends FlatSpec with Matchers {
   val CrossrefStringWithEmptyTitle = CrossrefString.replace("<<TITLE>>", "")
   val CrossrefStringWithoutTitle = CrossrefString.replace("title", "nottitle")
   val MalformedCrossrefString = CrossrefString.replace("}", "")
+  val CrossrefStringWithNoAuthors = CrossrefString.replace("<<TITLE>>", "Some Valid Title").replace("author", "no-author")
 
   // Unit tests
   "CrossrefScorable.jsonToMapFeatures()" should "handle invalid JSON" in {
@@ -95,6 +96,11 @@ class CrossrefScorableTest extends FlatSpec with Matchers {
     result.slug shouldBe Scorable.NoSlug
   }
 
+  it should "handle missing authors" in {
+    val result = CrossrefScorable.jsonToMapFeatures(CrossrefStringWithNoAuthors)
+    result.slug shouldBe Scorable.NoSlug
+  }
+
   it should "handle valid input" in {
     val result = CrossrefScorable.jsonToMapFeatures(CrossrefStringWithGoodTitle)
     result.slug shouldBe "sometitle"