Merge pull request #124 from Woutrrr/laravel-5

implement withoutTags scope from issue #115

Author: rtconner

README.md

@@ -77,6 +77,8 @@ Article::withAnyTag(['Gardening','Cooking'])->get(); // fetch articles with any
 
 Article::withAllTags(['Gardening', 'Cooking'])->get(); // only fetch articles with all the tags
 
+Article::withoutTags(['Gardening', 'Cooking'])->get(); // only fetch articles without all tags listed
+
 Conner\Tagging\Model\Tag::where('count', '>', 2)->get(); // return all tags used more than twice
 
 Article::existingTags(); // return collection of all existing tags on any articles

src/Taggable.php

@@ -223,6 +223,34 @@ public function scopeWithAnyTag($query, $tagNames)
 		$primaryKey = $this->getKeyName();
 		return $query->whereIn($this->getTable().'.'.$primaryKey, $tags);
 	}
+    
+    /**
+	 * Filter model to subset without the given tags
+	 *
+	 * @param $tagNames array|string
+	 */
+	public function scopeWithoutTags($query, $tagNames)
+	{
+		if(!is_array($tagNames)) {
+			$tagNames = func_get_args();
+			array_shift($tagNames);
+		}
+		
+		$tagNames = static::$taggingUtility->makeTagArray($tagNames);
+		
+		$normalizer = config('tagging.normalizer');
+		$normalizer = $normalizer ?: [static::$taggingUtility, 'slug'];
+		
+		$tagNames = array_map($normalizer, $tagNames);
+		$className = $query->getModel()->getMorphClass();
+		
+		$tags = Tagged::whereIn('tag_slug', $tagNames)
+			->where('taggable_type', $className)
+			->get()->pluck('taggable_id');
+		
+		$primaryKey = $this->getKeyName();
+		return $query->whereNotIn($this->getTable().'.'.$primaryKey, $tags);
+	}
 
 	/**
 	 * Adds a single tag