diff --git a/README.md b/README.md
index 1cd2090b..7fec4f9e 100644
--- a/README.md
+++ b/README.md
@@ -212,6 +212,14 @@ Specify table indexes
            default: '{}' 
 ```
 
+If raw DB expression is needed in index, then it must be for only one column. Example:
+
+```yaml
+    x-indexes:
+       - "gin(to_tsvector('english', search::text)):search" # valid
+       - "gin(to_tsvector('english', search::text)):search,column2" # invalid
+```
+
 ### `x-db-default-expression`
 
 Ability to provide default value by database expression
diff --git a/src/lib/AttributeResolver.php b/src/lib/AttributeResolver.php
index 0063d8df..79ff91f6 100644
--- a/src/lib/AttributeResolver.php
+++ b/src/lib/AttributeResolver.php
@@ -425,12 +425,16 @@ protected function prepareIndexes(array $indexes):array
         foreach ($indexes as $index) {
             $unique = false;
             if (strpos($index, ':') !== false) {
-                [$indexType, $props] = explode(':', $index);
+                // [$indexType, $props] = explode(':', $index);
+                // if `$index` is `gin(to_tsvector('english', search::text)):search,prop2`
+                $props = strrchr($index, ':'); # `$props` is now `:search,prop2`
+                $props = substr($props, 1); # search,prop2
+                $indexType = str_replace(':'.$props, '', $index); # `gin(to_tsvector('english', search::text))`
             } else {
                 $props = $index;
                 $indexType = null;
             }
-            if ($indexType === 'unique') {
+            if (strtolower((string) $indexType) === 'unique') {
                 $indexType = null;
                 $unique = true;
             }
diff --git a/src/lib/migrations/MigrationRecordBuilder.php b/src/lib/migrations/MigrationRecordBuilder.php
index 98ee03b8..1d4b0ed0 100644
--- a/src/lib/migrations/MigrationRecordBuilder.php
+++ b/src/lib/migrations/MigrationRecordBuilder.php
@@ -227,6 +227,7 @@ public function addFk(string $fkName, string $tableAlias, string $fkCol, string
                 $onUpdate
             );
         }
+        throw new \Exception('Cannot add foreign key');
     }
 
     public function addUniqueIndex(string $tableAlias, string $indexName, array $columns):string
@@ -242,11 +243,20 @@ public function addUniqueIndex(string $tableAlias, string $indexName, array $col
     public function addIndex(string $tableAlias, string $indexName, array $columns, ?string $using = null):string
     {
         $indexType = $using === null ? 'false' : "'".ColumnToCode::escapeQuotes($using)."'";
+
+        if ($using && (stripos($using, '(') !== false) && ApiGenerator::isPostgres()) {
+            // if `$using` is `gin(to_tsvector('english', search::text))`
+            $r = explode('(', $using, 2);
+            $indexType = "'".$r[0]."'"; # `gin`
+            $columnDbIndexExpression = substr($r[1], 0, -1); # to_tsvector('english', search::text)
+            $columns = [ColumnToCode::escapeQuotes($columnDbIndexExpression)];
+        }
+
         return sprintf(
             self::ADD_INDEX,
             $indexName,
             $tableAlias,
-            count($columns) === 1 ? "'{$columns[0]}'" : '["'.implode('", "', $columns).'"]',
+            count($columns) === 1 ? "'". $columns[0]."'" : '["'.implode('", "', $columns).'"]',
             $indexType
         );
     }
diff --git a/tests/specs/postgres_custom.yaml b/tests/specs/postgres_custom.yaml
index e3d9a810..d6137a3d 100644
--- a/tests/specs/postgres_custom.yaml
+++ b/tests/specs/postgres_custom.yaml
@@ -35,7 +35,7 @@ components:
         Custom:
             x-table: v3_pgcustom
             x-indexes:
-               - "gin(to_tsvector('english', status)):search"
+               - "gin(to_tsvector('english', search::text)):search"
             required:
                 - id
             properties:
diff --git a/tests/specs/postgres_custom/migrations_pgsql_db/m200000_000000_change_table_v3_pgcustom.php b/tests/specs/postgres_custom/migrations_pgsql_db/m200000_000000_change_table_v3_pgcustom.php
index a1ffe61a..37cb7765 100644
--- a/tests/specs/postgres_custom/migrations_pgsql_db/m200000_000000_change_table_v3_pgcustom.php
+++ b/tests/specs/postgres_custom/migrations_pgsql_db/m200000_000000_change_table_v3_pgcustom.php
@@ -17,7 +17,7 @@ public function safeUp()
         $this->alterColumn('{{%v3_pgcustom}}', 'json4', "SET DEFAULT '{\"foo\":\"bar\",\"bar\":\"baz\"}'");
         $this->alterColumn('{{%v3_pgcustom}}', 'status', "SET DEFAULT 'draft'");
         $this->alterColumn('{{%v3_pgcustom}}', 'status_x', "SET DEFAULT 'draft'");
-        $this->createIndex('v3_pgcustom_search_gin_index', '{{%v3_pgcustom}}', 'search', 'gin(to_tsvector(\'english\', status))');
+        $this->createIndex('v3_pgcustom_search_gin_index', '{{%v3_pgcustom}}', 'to_tsvector(\'english\', search::text)', 'gin');
     }
 
     public function safeDown()
diff --git a/tests/unit/MultiDbFreshMigrationTest.php b/tests/unit/MultiDbFreshMigrationTest.php
index 366bfb0b..f2495903 100644
--- a/tests/unit/MultiDbFreshMigrationTest.php
+++ b/tests/unit/MultiDbFreshMigrationTest.php
@@ -26,6 +26,7 @@ public function testMaria()
         $this->assertInstanceOf(MySqlSchema::class, Yii::$app->db->schema);
         $testFile = Yii::getAlias('@specs/blog.php');
         $this->runGenerator($testFile, $dbName);
+        $this->runActualMigrations($dbName, 5);
         $expectedFiles = $this->findExpectedFiles($testFile, $dbName);
         $actualFiles = $this->findActualFiles();
         $this->assertEquals($expectedFiles, $actualFiles);
@@ -39,6 +40,7 @@ public function testPostgres()
         $this->assertInstanceOf(PgSqlSchema::class, Yii::$app->db->schema);
         $testFile = Yii::getAlias('@specs/blog.php');
         $this->runGenerator($testFile, $dbName);
+        $this->runActualMigrations($dbName, 5);
         $expectedFiles = $this->findExpectedFiles($testFile, $dbName);
         $actualFiles = $this->findActualFiles();
         $this->assertEquals($expectedFiles, $actualFiles);
@@ -52,6 +54,7 @@ public function testMysql()
         $this->assertInstanceOf(MySqlSchema::class, Yii::$app->db->schema);
         $testFile = Yii::getAlias('@specs/blog.php');
         $this->runGenerator($testFile, $dbName);
+        $this->runActualMigrations($dbName, 5);
         $expectedFiles = $this->findExpectedFiles($testFile, $dbName);
         $actualFiles = $this->findActualFiles();
         $this->assertEquals($expectedFiles, $actualFiles);
diff --git a/tests/unit/MultiDbSecondaryMigrationTest.php b/tests/unit/MultiDbSecondaryMigrationTest.php
index f20b3e93..36f9179c 100644
--- a/tests/unit/MultiDbSecondaryMigrationTest.php
+++ b/tests/unit/MultiDbSecondaryMigrationTest.php
@@ -22,6 +22,7 @@ public function testPostgresCustom()
         $this->assertInstanceOf(PgSqlSchema::class, Yii::$app->db->schema);
         $testFile = Yii::getAlias('@specs/postgres_custom.php');
         $this->runGenerator($testFile, $dbName);
+        $this->runActualMigrations($dbName, 1);
         $expectedFiles = $this->findExpectedFiles($testFile, $dbName);
         $actualFiles = $this->findActualFiles();
         $this->assertEquals($expectedFiles, $actualFiles);
@@ -35,6 +36,7 @@ public function testMaria()
         $this->assertInstanceOf(MySqlSchema::class, Yii::$app->db->schema);
         $testFile = Yii::getAlias('@specs/blog_v2.php');
         $this->runGenerator($testFile, $dbName);
+//        $this->runActualMigrations($dbName, 6); since PK is changed, no need to run actual migrations here
         $expectedFiles = $this->findExpectedFiles($testFile, $dbName);
         $actualFiles = $this->findActualFiles();
         $this->assertEquals($expectedFiles, $actualFiles);