fix(database): multiple select fields in one statement (#1603)

Author: brendt

packages/database/src/QueryStatements/SelectStatement.php

@@ -8,6 +8,8 @@
 use Tempest\Database\QueryStatement;
 use Tempest\Support\Arr\ImmutableArray;
 
+use function Tempest\Support\str;
+
 final class SelectStatement implements QueryStatement, HasWhereStatements
 {
     public function __construct(
@@ -46,6 +48,13 @@ public function compile(DatabaseDialect $dialect): string
         $columns = $this->fields->isEmpty()
             ? '*'
             : $this->fields
+                ->flatMap(function (string|Stringable|FieldStatement $field) {
+                    if ($field instanceof FieldStatement) {
+                        return $field;
+                    }
+
+                    return str($field)->explode(',')->toArray();
+                })
                 ->map(function (string|Stringable|FieldStatement $field) use ($dialect) {
                     if (! $field instanceof FieldStatement) {
                         $field = new FieldStatement($field);

tests/Integration/Database/Builder/SelectQueryBuilderTest.php

@@ -45,6 +45,25 @@ public function test_select_query(): void
         $this->assertSame(['Timeline Taxi', '1', '2025-01-01'], $bindings);
     }
 
+    public function test_select_multiple_fields_as_one(): void
+    {
+        $this->assertSameWithoutBackticks(
+            'SELECT title AS t, index AS i FROM chapters',
+            query('chapters')
+                ->select('title AS t, index AS i')
+                ->build()
+                ->compile(),
+        );
+
+        $this->assertSameWithoutBackticks(
+            'SELECT title, index FROM chapters',
+            query('chapters')
+                ->select('title, index')
+                ->build()
+                ->compile(),
+        );
+    }
+
     public function test_select_without_any_fields_specified(): void
     {
         $query = query('chapters')->select()->build();