Select a proper expression when performing exists queries

ipl\Orm translates this, due to a quirk in PHP where numerical
strings are interpreted as integer keys in arrays, to the second
column of the given base model. This is undocumented behavior
and must be avoided.

Author: nilmerg

application/controllers/ContactGroupsController.php

@@ -18,6 +18,7 @@
 use ipl\Html\Form;
 use ipl\Html\HtmlString;
 use ipl\Html\TemplateString;
+use ipl\Sql\Expression;
 use ipl\Stdlib\Filter;
 use ipl\Web\Compat\CompatController;
 use ipl\Web\Compat\SearchControls;
@@ -91,8 +92,8 @@ public function indexAction(): void
         );
 
         $emptyStateMessage = null;
-        if (Contact::on(Database::get())->columns('1')->limit(1)->first() === null) {
-            if (Channel::on(Database::get())->columns('1')->limit(1)->first() === null) {
+        if (Contact::on(Database::get())->columns([new Expression('1')])->limit(1)->first() === null) {
+            if (Channel::on(Database::get())->columns([new Expression('1')])->limit(1)->first() === null) {
                 $addButton->disable($this->translate('A channel is required to add a contact group'));
 
                 $emptyStateMessage = TemplateString::create(

application/forms/ChannelForm.php

@@ -20,6 +20,7 @@
 use ipl\I18n\GettextTranslator;
 use ipl\I18n\StaticTranslator;
 use ipl\Sql\Connection;
+use ipl\Sql\Expression;
 use ipl\Stdlib\Filter;
 use ipl\Validator\EmailAddressValidator;
 use ipl\Web\Common\CsrfCounterMeasure;
@@ -128,13 +129,13 @@ protected function assemble(): void
 
         if ($this->channelId !== null) {
             $isInUse = Contact::on($this->db)
-                ->columns('1')
+                ->columns([new Expression('1')])
                 ->filter(Filter::equal('default_channel_id', $this->channelId))
                 ->first();
 
             if ($isInUse === null) {
                 $isInUse = RuleEscalationRecipient::on($this->db)
-                    ->columns('1')
+                    ->columns([new Expression('1')])
                     ->filter(Filter::equal('channel_id', $this->channelId))
                     ->first();
             }

library/Notifications/Model/Rotation.php

@@ -145,7 +145,7 @@ public function delete(): void
         $requirePriorityUpdate = true;
         if (RotationConfigForm::EXPERIMENTAL_OVERRIDES) {
             $rotations = self::on($db)
-                ->columns('1')
+                ->columns([new Expression('1')])
                 ->filter(Filter::equal('schedule_id', $this->schedule_id))
                 ->filter(Filter::equal('priority', $this->priority))
                 ->first();