Fix isMultiSelect and isFilesArray after merging

Author: fbessou

src/utils.js

@@ -304,21 +304,23 @@ export function isSelect(_schema, definitions = {}) {
   }
   return false;
 }
-  
+
 export function isMultiSelect(schema, definitions = {}) {
+  if (!schema.uniqueItems || !schema.items) {
+    return false;
+  }
   const itemsSchema = retrieveSchema(schema.items, definitions);
-  return schema.items
-    ? schema.uniqueItems && isSelect(itemsSchema, definitions)
-    : false;
+  return isSelect(itemsSchema, definitions);
 }
 
 export function isFilesArray(schema, uiSchema, definitions = {}) {
   if (uiSchema["ui:widget"] === "files") {
     return true;
-  } else if (schema.items) {
-    const itemsSchema = retrieveSchema(schema.items, definitions);
-    return (itemsSchema.type === "string" && itemsSchema.format === "data-url")
+  } else if (!schema.items) {
+    return false;
   }
+  const itemsSchema = retrieveSchema(schema.items, definitions);
+  return (itemsSchema.type === "string" && itemsSchema.format === "data-url");
 }
 
 export function isFixedItems(schema) {