Make a better database interactions

App/Models/Post.php

@@ -30,6 +30,7 @@ class Post extends \Core\Model
 
             if ($stmt = $db->query($sql)) {
                 $result = $stmt->fetchAll(\PDO::FETCH_ASSOC);
+                // For tests
                 return true;
             }
             return false;
@@ -60,16 +61,16 @@ class Post extends \Core\Model
         }
     }
 
-    public function entry($fields, $vals)
+    public function entry($args)
     {
-        if (count($fields) && count($vals) && count($fields) === count($vals)) {
+        if (count($args)) {
-            $keys = '`'.implode('`, `', $fields).'`';
+            $keys = '`'.implode('`, `', array_keys($args)).'`';
 
             $x = 1;
             $values = '';
-            foreach ($vals as $val) {
+            foreach ($args as $field) {
                 $values .= '?';
-                if ($x < count($vals)) {
+                if ($x < count($args)) {
                     $values .= ', ';
                 }
                 $x++;
@@ -84,7 +85,7 @@ class Post extends \Core\Model
 
                 $x = 1;
 
-                foreach ($vals as $val) {
+                foreach ($args as $val) {
                     $query->bindValue($x, urldecode($val));
                     $x++;
                 }

Core/Model.php

@@ -5,20 +5,18 @@ use App\Config;
 
 abstract class Model
 {
-    protected static $dsn;
+    protected static $conn = null;
 
     protected static function connectDB()
     {
-        static $conn = null;
-
         try {
-            if (!$conn) {
+            if (!self::$conn) {
                 $dsn = 'mysql:host='.Config::DB_HOST.';dbname='.Config::DB_DB;
-                $conn = new \PDO($dsn, Config::DB_UNAME, Config::DB_PWD);
+                self::$conn = new \PDO($dsn, Config::DB_UNAME, Config::DB_PWD);
 
-                $conn->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
+                self::$conn->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
             }
-            return $conn;
+            return self::$conn;
         } catch (PDOException $e) {
             echo $e->getMessage();
         }

_tests/unit/PostTest.php

@@ -7,18 +7,25 @@ class PostTest extends \PHPUnit\Framework\TestCase
      *
      * @test
      */
-    public function showDataSuccess()
+    public function databaseInteractionsSuccess()
     {
         $post = new Post();
 
         $this->assertTrue($post->showAll());
 
-        $fields = ['category', 'expired_at', 'creator', 'content'];
+        $args = [
-        $values = ['3', '2017-09-02', '2', 'barbarbarbarbarbarbar!'];
+            'category' => 3,
+            'expired_at' => '2017-09-02',
+            'creator' => 2,
+            'content' => 'barbarbarbarbarbarbar!'
+        ];
 
-        $this->assertTrue($post->entry($fields, $values));
+        $this->assertTrue($post->entry($args));
 
-        $args = ['category' => 5, 'content' => 'foofoofoofoo!'];
+        $args = [
+            'category' => 5,
+            'content' => 'foofoofoofoo!'
+        ];
 
         $this->assertTrue($post->update($args, 1));