Added "exists" method

Author: freevital

src/Contracts/RepositoryContract.php

@@ -113,6 +113,13 @@ public function findWhereNotIn($attribute, array $values, $columns = ['*']);
      */
     public function count();
 
+    /**
+     * Determine if the entity exists.
+     *
+     * @return mixed
+     */
+    public function exists();
+
     /**
      * Create new entity.
      *

src/Eloquent/BaseRepository.php

@@ -313,6 +313,24 @@ public function count()
         return $count;
     }
 
+    /**
+     * Determine if the entity exists.
+     *
+     * @return mixed
+     */
+    public function exists()
+    {
+        $this->applyCriteria();
+        $this->applyScope();
+
+        $exists = $this->query->exists();
+
+        $this->resetScope();
+        $this->resetQuery();
+
+        return $exists;
+    }
+
     /**
      * Create new entity.
      *