[8.x] Fix inconsistency in table names in validator (#37606)

* fix inconsistency in table names in validator

* Update ValidatesAttributes.php

Co-authored-by: Taylor Otwell <taylor@laravel.com>

src/Illuminate/Validation/Concerns/ValidatesAttributes.php

@@ -805,6 +805,11 @@ public function parseTable($table)
 
             $table = $model->getTable();
             $connection = $connection ?? $model->getConnectionName();
+
+            if (Str::contains($table, '.') && Str::startsWith($table, $connection)) {
+                $connection = null;
+            }
+
             $idColumn = $model->getKeyName();
         }
 

tests/Validation/ValidationValidatorTest.php

@@ -4955,6 +4955,14 @@ public function testParsingTablesFromModels()
         $this->assertNull($explicit_no_connection[0]);
         $this->assertSame('explicits', $explicit_no_connection[1]);
 
+        $explicit_model_with_prefix = $v->parseTable(ExplicitPrefixedTableModel::class);
+        $this->assertNull($explicit_model_with_prefix[0]);
+        $this->assertSame('prefix.explicits', $explicit_model_with_prefix[1]);
+
+        $explicit_table_with_connection_prefix = $v->parseTable('connection.table');
+        $this->assertSame('connection', $explicit_table_with_connection_prefix[0]);
+        $this->assertSame('table', $explicit_table_with_connection_prefix[1]);
+
         $noneloquent_no_connection = $v->parseTable(NonEloquentModel::class);
         $this->assertNull($noneloquent_no_connection[0]);
         $this->assertEquals(NonEloquentModel::class, $noneloquent_no_connection[1]);
@@ -6208,6 +6216,13 @@ class ExplicitTableModel extends Model
     public $timestamps = false;
 }
 
+class ExplicitPrefixedTableModel extends Model
+{
+    protected $table = 'prefix.explicits';
+    protected $guarded = [];
+    public $timestamps = false;
+}
+
 class ExplicitTableAndConnectionModel extends Model
 {
     protected $table = 'explicits';