DAO について修正

daos/thread.php

@@ -53,11 +53,10 @@ Thread
 
   public static function
   find (
-      int $id)
-  : \Dto\Thread
+      SQLite3 $db,
+      int     $id)
+  : ?\Dto\Thread
   {
-    // TODO: 書くこと
-
     $sql = "
         SELECT
           t.id,
@@ -78,6 +77,19 @@ Thread
           latest DESC";
 
     $result = $db -> query ($sql);
+    $row = $result -> fetchArray (SQLITE3_ASSOC);
+
+    if ($row === false)
+      return null;
+
+    $thread = new \Dto\Thread;
+
+    $thread -> id = $row['id'];
+    $thread -> title = $row['title'];
+    $thread -> explain = $row['explain'];
+    $thread -> length = $row['length'];
+
+    return $thread;
   }