Better support for searching without a term

Author: pascalbaljet

README.md

@@ -155,8 +155,19 @@ Search::add(Post::with('comments'), 'title')
 If you call the `get` method without a term or with an empty term, the package throws an `EmptySearchQueryException`. You can disable this behaviour with the `allowEmptySearchQuery` method.
 
 ```php
-Search::add(Post::with('comments'), 'title')
-    ->add(Video::with('likes'), 'title')
+Search::add(Post::with('comments'), 'title', 'published_at')
+    ->add(Video::with('likes'), 'title', 'released_at')
+    ->allowEmptySearchQuery()
+    ->get();
+```
+
+In this case, you can discard the second argument as well. With the `orderBy` method, you can set the column to sort by (previously the third argument):
+
+```php
+Search::add(Post::class)
+    ->orderBy('published_at')
+    ->add(Video::class)
+    ->orderBy('released_at')
     ->allowEmptySearchQuery()
     ->get();
 ```

src/ModelToSearchThrough.php

@@ -43,6 +43,19 @@ public function __construct(Builder $builder, Collection $columns, string $order
         $this->key           = $key;
     }
 
+    /**
+     * Setter for the orderBy column.
+     *
+     * @param string $orderByColumn
+     * @return self
+     */
+    public function orderByColumn(string $orderByColumn): self
+    {
+        $this->orderByColumn = $orderByColumn;
+
+        return $this;
+    }
+
     /**
      * Get a cloned instance of the builder.
      *

src/Searcher.php

@@ -120,7 +120,7 @@ public function allowEmptySearchQuery(): self
      * @param string $orderByColumn
      * @return self
      */
-    public function add($query, $columns, string $orderByColumn = 'updated_at'): self
+    public function add($query, $columns = null, string $orderByColumn = 'updated_at'): self
     {
         $modelToSearchThrough = new ModelToSearchThrough(
             is_string($query) ? $query::query() : $query,
@@ -134,6 +134,13 @@ public function add($query, $columns, string $orderByColumn = 'updated_at'): sel
         return $this;
     }
 
+    public function orderBy(string $orderByColumn): self
+    {
+        $this->modelsToSearchThrough->last()->orderByColumn($orderByColumn);
+
+        return $this;
+    }
+
     /**
      * Let's each search term start with a wildcard.
      *

tests/SearchTest.php

@@ -128,8 +128,8 @@ public function it_can_search_without_a_term()
         Video::create(['title' => 'bar']);
 
         $results = Search::new()
-            ->add(Post::class, 'title')
-            ->add(Video::class, 'title')
+            ->add(Post::class)->orderBy('updated_at')
+            ->add(Video::class)->orderBy('published_at')
             ->allowEmptySearchQuery()
             ->get();