Merge pull request #28 from ameliaikeda/cache-prefix

Add a prefix to the cache key.

README.md

@@ -50,8 +50,17 @@ Using the remember method is super simple. Just pass the number of minutes you w
 
 If you want to tag certain queries you can add `cacheTags('tag_name')` to your query. Please notice that cache tags are not supported by all cache drivers.
 
-	// Remember the number of users for an hour and tag it with 'user_queries'
-	User::remember(60)->cacheTags('user_queries')->count();
+    // Remember the number of users for an hour and tag it with 'user_queries'
+    User::remember(60)->cacheTags('user_queries')->count();
+
+### Cache prefix
+
+If you want a unique prefix added to the cache key for each of your queries (say, if your cache doesn't support tagging), you can add `prefix('prefix')` to your query.
+
+    // Remember the number of users for an hour and prefix the key with 'users'
+    User::remember(60)->prefix('users')->count();
+
+Alternatively, you can add the ``$rememberCachePrefix` property to your model to always use that cache prefix.
 
 #### Model wide cache tag
 

src/Query/Builder.php

@@ -34,6 +34,13 @@ class Builder extends \Illuminate\Database\Query\Builder
      */
     protected $cacheDriver;
 
+    /**
+     * A cache prefix.
+     *
+     * @var string
+     */
+    protected $cachePrefix = 'rememberable';
+
     /**
      * Execute the query as a "select" statement.
      *
@@ -160,7 +167,7 @@ protected function getCacheInfo()
      */
     public function getCacheKey()
     {
-        return $this->cacheKey ?: $this->generateCacheKey();
+        return $this->cachePrefix.':'.($this->cacheKey ?: $this->generateCacheKey());
     }
 
     /**
@@ -208,4 +215,18 @@ protected function getCacheCallback($columns)
             return $this->get($columns);
         };
     }
+
+    /**
+     * Set the cache prefix.
+     *
+     * @param string $prefix
+     *
+     * @return $this
+     */
+    public function prefix($prefix)
+    {
+        $this->cachePrefix = $prefix;
+
+        return $this;
+    }
 }

src/Rememberable.php

@@ -27,6 +27,10 @@ protected function newBaseQueryBuilder()
             $builder->cacheTags($this->rememberCacheTag);
         }
 
+        if (isset($this->rememberCachePrefix)) {
+            $builder->prefix($this->rememberCachePrefix);
+        }
+
         return $builder;
     }
 }