Fix chaining withoutPending() with where() (#1457)

At the moment, `where()` cannot be used correctly while using
`withoutPending()`. For example, if we have a single non-pending tenant
in our DB (with ID 'foo'), queries like
`Tenant::withoutPending()->where('id', 'nonexistent')->first()`will
incorrectly return the non-pending tenant ('foo').

This is because `withoutPending()` does
`$builder->whereNull('data->pending_since')->orWhereNull('data')`. These
two aren't grouped, so `withoutPending()->where('id', 'nonexistent')`
basically translates to "WHERE data->pending_since IS NULL **OR (data IS
NULL AND id = 'nonexistent')**". So the query will include all tenants
whose `pending_since` is null (= all non-pending tenants).

Grouping `->whereNull('data->pending_since')->orWhereNull('data')` in a
closure passed to a separate `where()` fixes this issue.

src/Database/Concerns/PendingScope.php

@@ -58,8 +58,10 @@ class PendingScope implements Scope
     {
         $builder->macro('withoutPending', function (Builder $builder) {
             $builder->withoutGlobalScope(static::class)
-                ->whereNull($builder->getModel()->getColumnForQuery('pending_since'))
+                ->where(function (Builder $query) {
-                ->orWhereNull($builder->getModel()->getDataColumn());
+                    $query->whereNull($query->getModel()->getColumnForQuery('pending_since'))
+                        ->orWhereNull($query->getModel()->getDataColumn());
+                });
 
             return $builder;
         });

tests/PendingTenantsTest.php

@@ -111,6 +111,18 @@ test('a new tenant gets created while pulling a pending tenant if the pending po
     expect(Tenant::withPending()->get()->count())->toBe(1); // All tenants
 });
 
+test('withoutPending chained with where clauses returns correct results', function () {
+    $tenant = Tenant::create();
+    $pendingTenant = Tenant::createPending();
+
+    // The query returned the correct tenant
+    expect(Tenant::withoutPending()->where('id', $tenant->id)->first()->id)->toBe($tenant->id);
+    // No tenant with this ID exists, the query returns null
+    expect(Tenant::withoutPending()->where('id', Str::random(8) . 'nonexistent-id')->first())->toBeNull();
+    // withoutPending() correctly excludes the pending tenant from the query
+    expect(Tenant::withoutPending()->where('id', $pendingTenant->id)->first())->toBeNull();
+});
+
 test('pending tenants are included in all queries based on the include_in_queries config', function () {
     Tenant::createPending();