support modifying a char column type (#41320)

Author: hafezdivandari

src/Illuminate/Database/Schema/Grammars/ChangeColumn.php

@@ -125,6 +125,10 @@ protected static function getDoctrineColumnChangeOptions(Fluent $fluent)
             $options['length'] = static::calculateDoctrineTextLength($fluent['type']);
         }
 
+        if ($fluent['type'] === 'char') {
+            $options['fixed'] = true;
+        }
+
         if (static::doesntNeedCharacterOptions($fluent['type'])) {
             $options['customSchemaOptions'] = [
                 'collation' => '',
@@ -151,6 +155,7 @@ protected static function getDoctrineColumnType($type)
             'mediumtext', 'longtext' => 'text',
             'binary' => 'blob',
             'uuid' => 'guid',
+            'char' => 'string',
             default => $type,
         });
     }

tests/Database/DatabaseSchemaBlueprintIntegrationTest.php

@@ -126,6 +126,29 @@ public function testChangingColumnWithCollationWorks()
         $this->assertEquals($expected2, $queries2);
     }
 
+    public function testChangingCharColumnsWork()
+    {
+        $this->db->connection()->getSchemaBuilder()->create('users', function ($table) {
+            $table->string('name');
+        });
+
+        $blueprint = new Blueprint('users', function ($table) {
+            $table->char('name', 50)->change();
+        });
+
+        $queries = $blueprint->toSql($this->db->connection(), new SQLiteGrammar);
+
+        $expected = [
+            'CREATE TEMPORARY TABLE __temp__users AS SELECT name FROM users',
+            'DROP TABLE users',
+            'CREATE TABLE users (name CHAR(50) NOT NULL COLLATE BINARY)',
+            'INSERT INTO users (name) SELECT name FROM __temp__users',
+            'DROP TABLE __temp__users',
+        ];
+
+        $this->assertEquals($expected, $queries);
+    }
+
     public function testRenameIndexWorks()
     {
         $this->db->connection()->getSchemaBuilder()->create('users', function ($table) {