diff --git a/backend/src/main/java/uk/ac/ebi/spot/ols/repository/v1/JsonHelper.java b/backend/src/main/java/uk/ac/ebi/spot/ols/repository/v1/JsonHelper.java index c5b13edbf..9c6b76861 100644 --- a/backend/src/main/java/uk/ac/ebi/spot/ols/repository/v1/JsonHelper.java +++ b/backend/src/main/java/uk/ac/ebi/spot/ols/repository/v1/JsonHelper.java @@ -42,7 +42,10 @@ public static String objectToString(JsonElement value) { } else if(value.isJsonObject()) { return objectToString(value.getAsJsonObject().get("value")); } else { - return value.getAsString(); + if (value.getAsString() == null) + return ""; + else + return value.getAsString(); } }