add: compilePrimary function to src/Schema/Grammar.php (#52)

Author: nickarellano

src/Schema/Grammar.php

@@ -25,6 +25,20 @@ public function __construct()
         $this->addSingleStoreModifiers();
     }
 
+    /**
+     * Compile a primary key command.
+     *
+     * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
+     * @param  \Illuminate\Support\Fluent  $command
+     * @return string
+     */
+    public function compilePrimary(Blueprint $blueprint, Fluent $command)
+    {
+        $command->name(null);
+
+        return $this->compileKey($blueprint, $command, 'primary key');
+    }
+
     /**
      * Create the column definition for a spatial Geography type.
      *