Add the lazy method to delay the creation of models in the database when using model factories

Author: sileence

src/Illuminate/Database/Eloquent/FactoryBuilder.php

@@ -36,6 +36,13 @@ class FactoryBuilder
      */
     protected $states;
 
+    /**
+     * The lazy status delays the creation of the models in the database.
+     *
+     * @var bool
+     */
+    protected $lazy = false;
+
     /**
      * The states to apply.
      *
@@ -102,6 +109,19 @@ public function states($states)
         return $this;
     }
 
+    /**
+     * Set the lazy status.
+     *
+     * @param bool $value
+     * @return $this
+     */
+    public function lazy($value = true)
+    {
+        $this->lazy = $value;
+
+        return $this;
+    }
+
     /**
      * Create a collection of models and persist them to the database.
      *
@@ -112,13 +132,17 @@ public function create(array $attributes = [])
     {
         $results = $this->make($attributes);
 
-        if ($results instanceof Model) {
-            $results->save();
-        } else {
-            $results->each->save();
-        }
+        $callback = function () use ($results) {
+            if ($results instanceof Model) {
+                $results->save();
+            } else {
+                $results->each->save();
+            }
+
+            return $results;
+        };
 
-        return $results;
+        return $this->lazy ? $callback : $callback();
     }
 
     /**