diff --git a/db/db_test.cc b/db/db_test.cc
index be9f5b6..e8989d9 100644
--- a/db/db_test.cc
+++ b/db/db_test.cc
@@ -2126,6 +2126,19 @@ class ModelDB : public DB {
     assert(false);  // Not implemented
     return Status::NotFound(key);
   }
+
+  Status Put_fields(const WriteOptions& opt, const Slice& key, const FieldArray& fields) {
+    return DB::Put_fields(WriteOptions(), key, fields);
+  }
+
+  Status Get_fields(const ReadOptions& options, const Slice& key, FieldArray* fields) {
+    return DB::Get_fields(ReadOptions(), key, fields);
+  }
+
+  std::vector<std::string> FindKeysByField(leveldb::DB* db, Field &field) {
+    return DB::FindKeysByField(db, field);
+  }
+
   Iterator* NewIterator(const ReadOptions& options) override {
     if (options.snapshot == nullptr) {
       KVMap* saved = new KVMap;