Fix few issues

Author: Omranic

README.md

@@ -701,6 +701,7 @@ Lastly, you can disable cache per single request by passing the following query
 > **Notes:**
 > - Repository level cache MUST be enabled for any lower level cache to work (query cache), otherwise it's considered disabled even if explicitly enabled per query.
 > - You can control how long repository cache lasts through the `rinvex.repository.cache.lifetime` config option, or per individual query through the `$lifetime` parameter.
+> - Repositories intelligently pass missing methods to the underlying model, so you actually can implement any kind of logic, or even complex queries by utilizing the repository model or the query builder.
 > - For more insights about the Active Repository implementation, I've published an article on the topic titled [Active Repository is good & Awesomely Usable](https://blog.omranic.com/active-repository-is-good-awesomely-usable-6991cfd58774), read it if you're interested.
 > - **Rinvex Repository** utilizes cache tags in a very smart way, even if your chosen cache driver doesn't support cache tags it will manage it virtually on it's own for precise cache management. Behind scenes it uses a json file to store cache keys. Checkout the `rinvex.repository.cache.keys_file` config option to change file path.
 > - **Rinvex Repository** follows the FIG PHP Standards Recommendations compliant with the [PSR-1: Basic Coding Standard](http://www.php-fig.org/psr/psr-1/), [PSR-2: Coding Style Guide](http://www.php-fig.org/psr/psr-2/) and [PSR-4: Autoloader](http://www.php-fig.org/psr/psr-4/) to ensure a high level of interoperability between shared PHP code.

src/Contracts/RepositoryContract.php

@@ -145,10 +145,10 @@ public function with(array $relations);
     /**
      * Add a basic where clause to the query.
      *
-     * @param  string  $attribute
-     * @param  string  $operator
-     * @param  mixed   $value
-     * @param  string  $boolean
+     * @param  string $attribute
+     * @param  string $operator
+     * @param  mixed  $value
+     * @param  string $boolean
      *
      * @return $this
      */

src/Repositories/BaseRepository.php

@@ -45,7 +45,7 @@ abstract class BaseRepository implements RepositoryContract
     /**
      * The repository cache lifetime.
      *
-     * @var int
+     * @var float|int
      */
     protected $cacheLifetime;
 
@@ -226,7 +226,7 @@ protected function resetRepository()
     protected function prepareQuery($model)
     {
         // Set the relationships that should be eager loaded
-        if ($this->relations) {
+        if (! empty($this->relations)) {
             $model = $model->with($this->relations);
         }
 
@@ -262,7 +262,7 @@ protected function prepareQuery($model)
         }
 
         // Add an "order by" clause to the query.
-        if ($this->orderBy) {
+        if (! empty($this->orderBy)) {
             list($attribute, $direction) = $this->orderBy;
 
             $model = $model->orderBy($attribute, $direction);
@@ -517,10 +517,10 @@ public function with(array $relations)
     /**
      * Add a basic where clause to the query.
      *
-     * @param  string  $attribute
-     * @param  string  $operator
-     * @param  mixed   $value
-     * @param  string  $boolean
+     * @param  string $attribute
+     * @param  string $operator
+     * @param  mixed  $value
+     * @param  string $boolean
      *
      * @return $this
      */
@@ -535,10 +535,10 @@ public function where($attribute, $operator = null, $value = null, $boolean = 'a
     /**
      * Add a "where in" clause to the query.
      *
-     * @param  string  $attribute
-     * @param  mixed   $values
-     * @param  string  $boolean
-     * @param  bool    $not
+     * @param  string $attribute
+     * @param  mixed  $values
+     * @param  string $boolean
+     * @param  bool   $not
      *
      * @return $this
      */