existing logic no space support

src/TarantoolStore.php

@@ -75,13 +75,19 @@ public function delete(Key $key, ?string $token = null)
      */
     public function exists(Key $key)
     {
-        $data = $this->getSpace()
-            ->select(Criteria::key([ (string) $key ]));
+        try {
+            $data = $this->client
+                ->getSpace($this->space)
+                ->select(Criteria::key([ (string) $key ]));
 
-        if (count($data)) {
-            [$tuple] = $data;
-            return $tuple[1] == $this->getUniqueToken($key)
-                && $tuple[2] >= microtime(true);
+            if (count($data)) {
+                [$tuple] = $data;
+                return $tuple[1] == $this->getUniqueToken($key)
+                    && $tuple[2] >= microtime(true);
+            }
+        } catch (RequestFailed $e) {
+            // query failure means there is no valid space
+            // it means that key is not exists in store
         }
         return false;
     }

tests/TarantoolStoreTest.php

@@ -301,4 +301,16 @@ public function testExpiredKeyOverwrite()
         $this->assertFalse($store->exists($key1));
         $this->assertTrue($store->exists($key2));
     }
+
+    public function testExistsOnDroppedSpace()
+    {
+        $key = new Key(uniqid(__METHOD__, true));
+
+        $store = $this->getStore();
+        $store->save($key);
+
+        $this->schema->tearDown();
+
+        $this->assertFalse($store->exists($key));
+    }
 }