Where not exists hack (#40)

* Laravel 9 PHP 8 upgrade #major

* Where not exists hack

* Apply fixes from StyleCI

Co-authored-by: StyleCI Bot <bot@styleci.io>

Author: Norgul

README.md

@@ -69,7 +69,7 @@ following:
 JSON key-value pair. 
 - It is possible to search by related models using ``.`` as a divider i.e. 
 `"relation.column": "operator value")`. **Note** this will execute a `WHERE EXISTS`, it will 
-not filter resulting relations if included within relations.
+not filter resulting relations if included within relations. To do a ``WHERE NOT EXISTS`` you can ue `!relation.column`.
 - ``operator`` is one of the available main operators for querying (listed [below](#main-operators))
 - ``values`` is a semicolon (`;`) separated list of values 
 (i.e. `"column": "=value;value2;value3"`) which

src/SearchCallbacks/AbstractCallback.php

@@ -12,8 +12,8 @@
 
 abstract class AbstractCallback
 {
-    protected Builder           $builder;
-    protected SearchParser      $searchParser;
+    protected Builder $builder;
+    protected SearchParser $searchParser;
     protected CategorizedValues $categorizedValues;
 
     /**
@@ -33,6 +33,13 @@ public function __construct(Builder $builder, SearchParser $searchParser)
         $this->builder->when(
             str_contains($this->searchParser->column, '.'),
             function (Builder $builder) {
+                // Hack for whereDoesntHave relation, doesn't work recursively.
+                if (str_contains($this->searchParser->column, '!') !== false) {
+                    $this->searchParser->column = str_replace('!', '', $this->searchParser->column);
+                    $this->appendRelations($builder, $this->searchParser->column, $this->categorizedValues, 'orWhereDoesntHave');
+
+                    return;
+                }
                 $this->appendRelations($builder, $this->searchParser->column, $this->categorizedValues);
             },
             function (Builder $builder) {