diff --git a/aerich/__init__.py b/aerich/__init__.py
index a4dfe93..67ef7e3 100644
--- a/aerich/__init__.py
+++ b/aerich/__init__.py
@@ -99,11 +99,8 @@ class Command:
         return ret
 
     async def history(self):
-        ret = []
         versions = Migrate.get_all_version_files()
-        for version in versions:
-            ret.append(version)
-        return ret
+        return [version for version in versions]
 
     async def inspectdb(self, tables: List[str] = None) -> str:
         connection = get_app_connection(self.tortoise_config, self.app)
diff --git a/aerich/cli.py b/aerich/cli.py
index 39d9942..841f8a3 100644
--- a/aerich/cli.py
+++ b/aerich/cli.py
@@ -54,10 +54,10 @@ async def cli(ctx: Context, config, app):
 
     invoked_subcommand = ctx.invoked_subcommand
     if invoked_subcommand != "init":
-        if not Path(config).exists():
+        config_path = Path(config)
+        if not config_path.exists():
             raise UsageError("You must exec init first", ctx=ctx)
-        with open(config, "r") as f:
-            content = f.read()
+        content = config_path.read_text()
         doc = tomlkit.parse(content)
         try:
             tool = doc["tool"]["aerich"]
@@ -192,9 +192,9 @@ async def init(ctx: Context, tortoise_orm, location, src_folder):
     # check that we can find the configuration, if not we can fail before the config file gets created
     add_src_path(src_folder)
     get_tortoise_config(ctx, tortoise_orm)
-    if Path(config_file).exists():
-        with open(config_file, "r") as f:
-            content = f.read()
+    config_path = Path(config_file)
+    if config_path.exists():
+        content = config_path.read_text()
         doc = tomlkit.parse(content)
     else:
         doc = tomlkit.parse("[tool.aerich]")
@@ -204,8 +204,7 @@ async def init(ctx: Context, tortoise_orm, location, src_folder):
     table["src_folder"] = src_folder
     doc["tool"]["aerich"] = table
 
-    with open(config_file, "w") as f:
-        f.write(tomlkit.dumps(doc))
+    config_path.write_text(tomlkit.dumps(doc))
 
     Path(location).mkdir(parents=True, exist_ok=True)
 
diff --git a/aerich/ddl/__init__.py b/aerich/ddl/__init__.py
index 892d9e9..d8a1595 100644
--- a/aerich/ddl/__init__.py
+++ b/aerich/ddl/__init__.py
@@ -23,7 +23,12 @@ class BaseDDL:
     _DROP_INDEX_TEMPLATE = 'ALTER TABLE "{table_name}" DROP INDEX "{index_name}"'
     _ADD_FK_TEMPLATE = 'ALTER TABLE "{table_name}" ADD CONSTRAINT "{fk_name}" FOREIGN KEY ("{db_column}") REFERENCES "{table}" ("{field}") ON DELETE {on_delete}'
     _DROP_FK_TEMPLATE = 'ALTER TABLE "{table_name}" DROP FOREIGN KEY "{fk_name}"'
-    _M2M_TABLE_TEMPLATE = 'CREATE TABLE "{table_name}" ("{backward_key}" {backward_type} NOT NULL REFERENCES "{backward_table}" ("{backward_field}") ON DELETE CASCADE,"{forward_key}" {forward_type} NOT NULL REFERENCES "{forward_table}" ("{forward_field}") ON DELETE {on_delete}){extra}{comment}'
+    _M2M_TABLE_TEMPLATE = (
+        'CREATE TABLE "{table_name}" (\n'
+        '    "{backward_key}" {backward_type} NOT NULL REFERENCES "{backward_table}" ("{backward_field}") ON DELETE CASCADE,\n'
+        '    "{forward_key}" {forward_type} NOT NULL REFERENCES "{forward_table}" ("{forward_field}") ON DELETE {on_delete}\n'
+        "){extra}{comment}"
+    )
     _MODIFY_COLUMN_TEMPLATE = 'ALTER TABLE "{table_name}" MODIFY COLUMN {column}'
     _CHANGE_COLUMN_TEMPLATE = (
         'ALTER TABLE "{table_name}" CHANGE {old_column_name} {new_column_name} {new_column_type}'
@@ -180,7 +185,7 @@ class BaseDDL:
                 "idx" if not unique else "uid", model, field_names
             ),
             table_name=model._meta.db_table,
-            column_names=", ".join([self.schema_generator.quote(f) for f in field_names]),
+            column_names=", ".join(self.schema_generator.quote(f) for f in field_names),
         )
 
     def drop_index(self, model: "Type[Model]", field_names: List[str], unique=False):
diff --git a/aerich/ddl/mysql/__init__.py b/aerich/ddl/mysql/__init__.py
index 0cce776..2eea288 100644
--- a/aerich/ddl/mysql/__init__.py
+++ b/aerich/ddl/mysql/__init__.py
@@ -22,6 +22,11 @@ class MysqlDDL(BaseDDL):
     _DROP_INDEX_TEMPLATE = "ALTER TABLE `{table_name}` DROP INDEX `{index_name}`"
     _ADD_FK_TEMPLATE = "ALTER TABLE `{table_name}` ADD CONSTRAINT `{fk_name}` FOREIGN KEY (`{db_column}`) REFERENCES `{table}` (`{field}`) ON DELETE {on_delete}"
     _DROP_FK_TEMPLATE = "ALTER TABLE `{table_name}` DROP FOREIGN KEY `{fk_name}`"
-    _M2M_TABLE_TEMPLATE = "CREATE TABLE `{table_name}` (`{backward_key}` {backward_type} NOT NULL REFERENCES `{backward_table}` (`{backward_field}`) ON DELETE CASCADE,`{forward_key}` {forward_type} NOT NULL REFERENCES `{forward_table}` (`{forward_field}`) ON DELETE CASCADE){extra}{comment}"
+    _M2M_TABLE_TEMPLATE = (
+        "CREATE TABLE `{table_name}` (\n"
+        "    `{backward_key}` {backward_type} NOT NULL REFERENCES `{backward_table}` (`{backward_field}`) ON DELETE CASCADE,\n"
+        "    `{forward_key}` {forward_type} NOT NULL REFERENCES `{forward_table}` (`{forward_field}`) ON DELETE CASCADE\n"
+        "){extra}{comment}"
+    )
     _MODIFY_COLUMN_TEMPLATE = "ALTER TABLE `{table_name}` MODIFY COLUMN {column}"
     _RENAME_TABLE_TEMPLATE = "ALTER TABLE `{old_table_name}` RENAME TO `{new_table_name}`"
diff --git a/tests/test_ddl.py b/tests/test_ddl.py
index 9227161..c710b33 100644
--- a/tests/test_ddl.py
+++ b/tests/test_ddl.py
@@ -72,18 +72,16 @@ def test_modify_column():
     ret1 = Migrate.ddl.modify_column(User, User._meta.fields_map.get("is_active").describe(False))
     if isinstance(Migrate.ddl, MysqlDDL):
         assert ret0 == "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200)"
+        assert (
+            ret1
+            == "ALTER TABLE `user` MODIFY COLUMN `is_active` BOOL NOT NULL  COMMENT 'Is Active' DEFAULT 1"
+        )
     elif isinstance(Migrate.ddl, PostgresDDL):
         assert (
             ret0
             == 'ALTER TABLE "category" ALTER COLUMN "name" TYPE VARCHAR(200) USING "name"::VARCHAR(200)'
         )
 
-    if isinstance(Migrate.ddl, MysqlDDL):
-        assert (
-            ret1
-            == "ALTER TABLE `user` MODIFY COLUMN `is_active` BOOL NOT NULL  COMMENT 'Is Active' DEFAULT 1"
-        )
-    elif isinstance(Migrate.ddl, PostgresDDL):
         assert (
             ret1 == 'ALTER TABLE "user" ALTER COLUMN "is_active" TYPE BOOL USING "is_active"::BOOL'
         )
diff --git a/tests/test_migrate.py b/tests/test_migrate.py
index 6ce773a..d998d95 100644
--- a/tests/test_migrate.py
+++ b/tests/test_migrate.py
@@ -802,74 +802,70 @@ def test_migrate(mocker: MockerFixture):
         Migrate.diff_models(models_describe, old_models_describe, False)
     Migrate._merge_operators()
     if isinstance(Migrate.ddl, MysqlDDL):
-        expected_upgrade_operators = set(
-            [
-                "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200)",
-                "ALTER TABLE `category` MODIFY COLUMN `slug` VARCHAR(100) NOT NULL",
-                "ALTER TABLE `config` ADD `user_id` INT NOT NULL  COMMENT 'User'",
-                "ALTER TABLE `config` ADD CONSTRAINT `fk_config_user_17daa970` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE",
-                "ALTER TABLE `config` ALTER COLUMN `status` DROP DEFAULT",
-                "ALTER TABLE `config` MODIFY COLUMN `value` JSON NOT NULL",
-                "ALTER TABLE `email` ADD `address` VARCHAR(200) NOT NULL",
-                "ALTER TABLE `email` DROP COLUMN `user_id`",
-                "CREATE TABLE `email_user` (`email_id` INT NOT NULL REFERENCES `email` (`email_id`) ON DELETE CASCADE,`user_id` INT NOT NULL REFERENCES `user` (`id`) ON DELETE CASCADE) CHARACTER SET utf8mb4",
-                "ALTER TABLE `configs` RENAME TO `config`",
-                "ALTER TABLE `product` RENAME COLUMN `image` TO `pic`",
-                "ALTER TABLE `email` RENAME COLUMN `id` TO `email_id`",
-                "ALTER TABLE `product` ADD INDEX `idx_product_name_869427` (`name`, `type_db_alias`)",
-                "ALTER TABLE `email` ADD INDEX `idx_email_email_4a1a33` (`email`)",
-                "ALTER TABLE `product` ADD UNIQUE INDEX `uid_product_name_869427` (`name`, `type_db_alias`)",
-                "ALTER TABLE `product` ALTER COLUMN `view_num` SET DEFAULT 0",
-                "ALTER TABLE `product` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
-                "ALTER TABLE `product` MODIFY COLUMN `is_reviewed` BOOL NOT NULL  COMMENT 'Is Reviewed'",
-                "ALTER TABLE `user` DROP COLUMN `avatar`",
-                "ALTER TABLE `user` MODIFY COLUMN `password` VARCHAR(100) NOT NULL",
-                "ALTER TABLE `user` MODIFY COLUMN `intro` LONGTEXT NOT NULL",
-                "ALTER TABLE `user` MODIFY COLUMN `last_login` DATETIME(6) NOT NULL  COMMENT 'Last Login'",
-                "ALTER TABLE `user` MODIFY COLUMN `is_active` BOOL NOT NULL  COMMENT 'Is Active' DEFAULT 1",
-                "ALTER TABLE `user` MODIFY COLUMN `is_superuser` BOOL NOT NULL  COMMENT 'Is SuperUser' DEFAULT 0",
-                "ALTER TABLE `user` MODIFY COLUMN `longitude` DECIMAL(10,8) NOT NULL",
-                "ALTER TABLE `user` ADD UNIQUE INDEX `uid_user_usernam_9987ab` (`username`)",
-                "CREATE TABLE IF NOT EXISTS `newmodel` (\n    `id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,\n    `name` VARCHAR(50) NOT NULL\n) CHARACTER SET utf8mb4;",
-                "ALTER TABLE `category` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
-                "ALTER TABLE `product` MODIFY COLUMN `body` LONGTEXT NOT NULL",
-                "ALTER TABLE `email` MODIFY COLUMN `is_primary` BOOL NOT NULL  DEFAULT 0",
-            ]
-        )
-        expected_downgrade_operators = set(
-            [
-                "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200) NOT NULL",
-                "ALTER TABLE `category` MODIFY COLUMN `slug` VARCHAR(200) NOT NULL",
-                "ALTER TABLE `config` DROP COLUMN `user_id`",
-                "ALTER TABLE `config` DROP FOREIGN KEY `fk_config_user_17daa970`",
-                "ALTER TABLE `config` ALTER COLUMN `status` SET DEFAULT 1",
-                "ALTER TABLE `email` ADD `user_id` INT NOT NULL",
-                "ALTER TABLE `email` DROP COLUMN `address`",
-                "ALTER TABLE `config` RENAME TO `configs`",
-                "ALTER TABLE `product` RENAME COLUMN `pic` TO `image`",
-                "ALTER TABLE `email` RENAME COLUMN `email_id` TO `id`",
-                "ALTER TABLE `product` DROP INDEX `idx_product_name_869427`",
-                "ALTER TABLE `email` DROP INDEX `idx_email_email_4a1a33`",
-                "ALTER TABLE `product` DROP INDEX `uid_product_name_869427`",
-                "ALTER TABLE `product` ALTER COLUMN `view_num` DROP DEFAULT",
-                "ALTER TABLE `user` ADD `avatar` VARCHAR(200) NOT NULL  DEFAULT ''",
-                "ALTER TABLE `user` DROP INDEX `idx_user_usernam_9987ab`",
-                "ALTER TABLE `user` MODIFY COLUMN `password` VARCHAR(200) NOT NULL",
-                "DROP TABLE IF EXISTS `email_user`",
-                "DROP TABLE IF EXISTS `newmodel`",
-                "ALTER TABLE `user` MODIFY COLUMN `intro` LONGTEXT NOT NULL",
-                "ALTER TABLE `config` MODIFY COLUMN `value` TEXT NOT NULL",
-                "ALTER TABLE `category` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
-                "ALTER TABLE `product` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
-                "ALTER TABLE `product` MODIFY COLUMN `is_reviewed` BOOL NOT NULL  COMMENT 'Is Reviewed'",
-                "ALTER TABLE `user` MODIFY COLUMN `last_login` DATETIME(6) NOT NULL  COMMENT 'Last Login'",
-                "ALTER TABLE `user` MODIFY COLUMN `is_active` BOOL NOT NULL  COMMENT 'Is Active' DEFAULT 1",
-                "ALTER TABLE `user` MODIFY COLUMN `is_superuser` BOOL NOT NULL  COMMENT 'Is SuperUser' DEFAULT 0",
-                "ALTER TABLE `user` MODIFY COLUMN `longitude` DECIMAL(12,9) NOT NULL",
-                "ALTER TABLE `product` MODIFY COLUMN `body` LONGTEXT NOT NULL",
-                "ALTER TABLE `email` MODIFY COLUMN `is_primary` BOOL NOT NULL  DEFAULT 0",
-            ]
-        )
+        expected_upgrade_operators = {
+            "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200)",
+            "ALTER TABLE `category` MODIFY COLUMN `slug` VARCHAR(100) NOT NULL",
+            "ALTER TABLE `config` ADD `user_id` INT NOT NULL  COMMENT 'User'",
+            "ALTER TABLE `config` ADD CONSTRAINT `fk_config_user_17daa970` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE",
+            "ALTER TABLE `config` ALTER COLUMN `status` DROP DEFAULT",
+            "ALTER TABLE `config` MODIFY COLUMN `value` JSON NOT NULL",
+            "ALTER TABLE `email` ADD `address` VARCHAR(200) NOT NULL",
+            "ALTER TABLE `email` DROP COLUMN `user_id`",
+            "ALTER TABLE `configs` RENAME TO `config`",
+            "ALTER TABLE `product` RENAME COLUMN `image` TO `pic`",
+            "ALTER TABLE `email` RENAME COLUMN `id` TO `email_id`",
+            "ALTER TABLE `product` ADD INDEX `idx_product_name_869427` (`name`, `type_db_alias`)",
+            "ALTER TABLE `email` ADD INDEX `idx_email_email_4a1a33` (`email`)",
+            "ALTER TABLE `product` ADD UNIQUE INDEX `uid_product_name_869427` (`name`, `type_db_alias`)",
+            "ALTER TABLE `product` ALTER COLUMN `view_num` SET DEFAULT 0",
+            "ALTER TABLE `product` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
+            "ALTER TABLE `product` MODIFY COLUMN `is_reviewed` BOOL NOT NULL  COMMENT 'Is Reviewed'",
+            "ALTER TABLE `user` DROP COLUMN `avatar`",
+            "ALTER TABLE `user` MODIFY COLUMN `password` VARCHAR(100) NOT NULL",
+            "ALTER TABLE `user` MODIFY COLUMN `intro` LONGTEXT NOT NULL",
+            "ALTER TABLE `user` MODIFY COLUMN `last_login` DATETIME(6) NOT NULL  COMMENT 'Last Login'",
+            "ALTER TABLE `user` MODIFY COLUMN `is_active` BOOL NOT NULL  COMMENT 'Is Active' DEFAULT 1",
+            "ALTER TABLE `user` MODIFY COLUMN `is_superuser` BOOL NOT NULL  COMMENT 'Is SuperUser' DEFAULT 0",
+            "ALTER TABLE `user` MODIFY COLUMN `longitude` DECIMAL(10,8) NOT NULL",
+            "ALTER TABLE `user` ADD UNIQUE INDEX `uid_user_usernam_9987ab` (`username`)",
+            "CREATE TABLE `email_user` (\n    `email_id` INT NOT NULL REFERENCES `email` (`email_id`) ON DELETE CASCADE,\n    `user_id` INT NOT NULL REFERENCES `user` (`id`) ON DELETE CASCADE\n) CHARACTER SET utf8mb4",
+            "CREATE TABLE IF NOT EXISTS `newmodel` (\n    `id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,\n    `name` VARCHAR(50) NOT NULL\n) CHARACTER SET utf8mb4;",
+            "ALTER TABLE `category` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
+            "ALTER TABLE `product` MODIFY COLUMN `body` LONGTEXT NOT NULL",
+            "ALTER TABLE `email` MODIFY COLUMN `is_primary` BOOL NOT NULL  DEFAULT 0",
+        }
+        expected_downgrade_operators = {
+            "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200) NOT NULL",
+            "ALTER TABLE `category` MODIFY COLUMN `slug` VARCHAR(200) NOT NULL",
+            "ALTER TABLE `config` DROP COLUMN `user_id`",
+            "ALTER TABLE `config` DROP FOREIGN KEY `fk_config_user_17daa970`",
+            "ALTER TABLE `config` ALTER COLUMN `status` SET DEFAULT 1",
+            "ALTER TABLE `email` ADD `user_id` INT NOT NULL",
+            "ALTER TABLE `email` DROP COLUMN `address`",
+            "ALTER TABLE `config` RENAME TO `configs`",
+            "ALTER TABLE `product` RENAME COLUMN `pic` TO `image`",
+            "ALTER TABLE `email` RENAME COLUMN `email_id` TO `id`",
+            "ALTER TABLE `product` DROP INDEX `idx_product_name_869427`",
+            "ALTER TABLE `email` DROP INDEX `idx_email_email_4a1a33`",
+            "ALTER TABLE `product` DROP INDEX `uid_product_name_869427`",
+            "ALTER TABLE `product` ALTER COLUMN `view_num` DROP DEFAULT",
+            "ALTER TABLE `user` ADD `avatar` VARCHAR(200) NOT NULL  DEFAULT ''",
+            "ALTER TABLE `user` DROP INDEX `idx_user_usernam_9987ab`",
+            "ALTER TABLE `user` MODIFY COLUMN `password` VARCHAR(200) NOT NULL",
+            "DROP TABLE IF EXISTS `email_user`",
+            "DROP TABLE IF EXISTS `newmodel`",
+            "ALTER TABLE `user` MODIFY COLUMN `intro` LONGTEXT NOT NULL",
+            "ALTER TABLE `config` MODIFY COLUMN `value` TEXT NOT NULL",
+            "ALTER TABLE `category` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
+            "ALTER TABLE `product` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
+            "ALTER TABLE `product` MODIFY COLUMN `is_reviewed` BOOL NOT NULL  COMMENT 'Is Reviewed'",
+            "ALTER TABLE `user` MODIFY COLUMN `last_login` DATETIME(6) NOT NULL  COMMENT 'Last Login'",
+            "ALTER TABLE `user` MODIFY COLUMN `is_active` BOOL NOT NULL  COMMENT 'Is Active' DEFAULT 1",
+            "ALTER TABLE `user` MODIFY COLUMN `is_superuser` BOOL NOT NULL  COMMENT 'Is SuperUser' DEFAULT 0",
+            "ALTER TABLE `user` MODIFY COLUMN `longitude` DECIMAL(12,9) NOT NULL",
+            "ALTER TABLE `product` MODIFY COLUMN `body` LONGTEXT NOT NULL",
+            "ALTER TABLE `email` MODIFY COLUMN `is_primary` BOOL NOT NULL  DEFAULT 0",
+        }
         assert not set(Migrate.upgrade_operators).symmetric_difference(expected_upgrade_operators)
 
         assert not set(Migrate.downgrade_operators).symmetric_difference(
@@ -877,74 +873,70 @@ def test_migrate(mocker: MockerFixture):
         )
 
     elif isinstance(Migrate.ddl, PostgresDDL):
-        expected_upgrade_operators = set(
-            [
-                'ALTER TABLE "category" ALTER COLUMN "name" DROP NOT NULL',
-                'ALTER TABLE "category" ALTER COLUMN "slug" TYPE VARCHAR(100) USING "slug"::VARCHAR(100)',
-                'ALTER TABLE "category" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
-                'ALTER TABLE "config" ADD "user_id" INT NOT NULL',
-                'ALTER TABLE "config" ADD CONSTRAINT "fk_config_user_17daa970" FOREIGN KEY ("user_id") REFERENCES "user" ("id") ON DELETE CASCADE',
-                'ALTER TABLE "config" ALTER COLUMN "status" DROP DEFAULT',
-                'ALTER TABLE "config" ALTER COLUMN "value" TYPE JSONB USING "value"::JSONB',
-                'ALTER TABLE "configs" RENAME TO "config"',
-                'ALTER TABLE "email" ADD "address" VARCHAR(200) NOT NULL',
-                'ALTER TABLE "email" DROP COLUMN "user_id"',
-                'ALTER TABLE "email" RENAME COLUMN "id" TO "email_id"',
-                'ALTER TABLE "email" ALTER COLUMN "is_primary" TYPE BOOL USING "is_primary"::BOOL',
-                'ALTER TABLE "product" ALTER COLUMN "view_num" SET DEFAULT 0',
-                'ALTER TABLE "product" RENAME COLUMN "image" TO "pic"',
-                'ALTER TABLE "product" ALTER COLUMN "is_reviewed" TYPE BOOL USING "is_reviewed"::BOOL',
-                'ALTER TABLE "product" ALTER COLUMN "body" TYPE TEXT USING "body"::TEXT',
-                'ALTER TABLE "product" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
-                'ALTER TABLE "user" ALTER COLUMN "password" TYPE VARCHAR(100) USING "password"::VARCHAR(100)',
-                'ALTER TABLE "user" DROP COLUMN "avatar"',
-                'ALTER TABLE "user" ALTER COLUMN "is_superuser" TYPE BOOL USING "is_superuser"::BOOL',
-                'ALTER TABLE "user" ALTER COLUMN "last_login" TYPE TIMESTAMPTZ USING "last_login"::TIMESTAMPTZ',
-                'ALTER TABLE "user" ALTER COLUMN "intro" TYPE TEXT USING "intro"::TEXT',
-                'ALTER TABLE "user" ALTER COLUMN "is_active" TYPE BOOL USING "is_active"::BOOL',
-                'ALTER TABLE "user" ALTER COLUMN "longitude" TYPE DECIMAL(10,8) USING "longitude"::DECIMAL(10,8)',
-                'CREATE INDEX "idx_product_name_869427" ON "product" ("name", "type_db_alias")',
-                'CREATE INDEX "idx_email_email_4a1a33" ON "email" ("email")',
-                'CREATE TABLE "email_user" ("email_id" INT NOT NULL REFERENCES "email" ("email_id") ON DELETE CASCADE,"user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE)',
-                'CREATE TABLE IF NOT EXISTS "newmodel" (\n    "id" SERIAL NOT NULL PRIMARY KEY,\n    "name" VARCHAR(50) NOT NULL\n);\nCOMMENT ON COLUMN "config"."user_id" IS \'User\';',
-                'CREATE UNIQUE INDEX "uid_product_name_869427" ON "product" ("name", "type_db_alias")',
-                'CREATE UNIQUE INDEX "uid_user_usernam_9987ab" ON "user" ("username")',
-            ]
-        )
-        expected_downgrade_operators = set(
-            [
-                'ALTER TABLE "category" ALTER COLUMN "name" SET NOT NULL',
-                'ALTER TABLE "category" ALTER COLUMN "slug" TYPE VARCHAR(200) USING "slug"::VARCHAR(200)',
-                'ALTER TABLE "category" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
-                'ALTER TABLE "config" ALTER COLUMN "status" SET DEFAULT 1',
-                'ALTER TABLE "config" DROP COLUMN "user_id"',
-                'ALTER TABLE "config" DROP CONSTRAINT "fk_config_user_17daa970"',
-                'ALTER TABLE "config" RENAME TO "configs"',
-                'ALTER TABLE "config" ALTER COLUMN "value" TYPE JSONB USING "value"::JSONB',
-                'ALTER TABLE "email" ADD "user_id" INT NOT NULL',
-                'ALTER TABLE "email" DROP COLUMN "address"',
-                'ALTER TABLE "email" RENAME COLUMN "email_id" TO "id"',
-                'ALTER TABLE "email" ALTER COLUMN "is_primary" TYPE BOOL USING "is_primary"::BOOL',
-                'ALTER TABLE "product" ALTER COLUMN "view_num" DROP DEFAULT',
-                'ALTER TABLE "product" RENAME COLUMN "pic" TO "image"',
-                'ALTER TABLE "user" ADD "avatar" VARCHAR(200) NOT NULL  DEFAULT \'\'',
-                'ALTER TABLE "user" ALTER COLUMN "password" TYPE VARCHAR(200) USING "password"::VARCHAR(200)',
-                'ALTER TABLE "user" ALTER COLUMN "last_login" TYPE TIMESTAMPTZ USING "last_login"::TIMESTAMPTZ',
-                'ALTER TABLE "user" ALTER COLUMN "is_superuser" TYPE BOOL USING "is_superuser"::BOOL',
-                'ALTER TABLE "user" ALTER COLUMN "is_active" TYPE BOOL USING "is_active"::BOOL',
-                'ALTER TABLE "user" ALTER COLUMN "intro" TYPE TEXT USING "intro"::TEXT',
-                'ALTER TABLE "user" ALTER COLUMN "longitude" TYPE DECIMAL(12,9) USING "longitude"::DECIMAL(12,9)',
-                'ALTER TABLE "product" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
-                'ALTER TABLE "product" ALTER COLUMN "is_reviewed" TYPE BOOL USING "is_reviewed"::BOOL',
-                'ALTER TABLE "product" ALTER COLUMN "body" TYPE TEXT USING "body"::TEXT',
-                'DROP INDEX "idx_product_name_869427"',
-                'DROP INDEX "idx_email_email_4a1a33"',
-                'DROP INDEX "idx_user_usernam_9987ab"',
-                'DROP INDEX "uid_product_name_869427"',
-                'DROP TABLE IF EXISTS "email_user"',
-                'DROP TABLE IF EXISTS "newmodel"',
-            ]
-        )
+        expected_upgrade_operators = {
+            'ALTER TABLE "category" ALTER COLUMN "name" DROP NOT NULL',
+            'ALTER TABLE "category" ALTER COLUMN "slug" TYPE VARCHAR(100) USING "slug"::VARCHAR(100)',
+            'ALTER TABLE "category" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
+            'ALTER TABLE "config" ADD "user_id" INT NOT NULL',
+            'ALTER TABLE "config" ADD CONSTRAINT "fk_config_user_17daa970" FOREIGN KEY ("user_id") REFERENCES "user" ("id") ON DELETE CASCADE',
+            'ALTER TABLE "config" ALTER COLUMN "status" DROP DEFAULT',
+            'ALTER TABLE "config" ALTER COLUMN "value" TYPE JSONB USING "value"::JSONB',
+            'ALTER TABLE "configs" RENAME TO "config"',
+            'ALTER TABLE "email" ADD "address" VARCHAR(200) NOT NULL',
+            'ALTER TABLE "email" DROP COLUMN "user_id"',
+            'ALTER TABLE "email" RENAME COLUMN "id" TO "email_id"',
+            'ALTER TABLE "email" ALTER COLUMN "is_primary" TYPE BOOL USING "is_primary"::BOOL',
+            'ALTER TABLE "product" ALTER COLUMN "view_num" SET DEFAULT 0',
+            'ALTER TABLE "product" RENAME COLUMN "image" TO "pic"',
+            'ALTER TABLE "product" ALTER COLUMN "is_reviewed" TYPE BOOL USING "is_reviewed"::BOOL',
+            'ALTER TABLE "product" ALTER COLUMN "body" TYPE TEXT USING "body"::TEXT',
+            'ALTER TABLE "product" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
+            'ALTER TABLE "user" ALTER COLUMN "password" TYPE VARCHAR(100) USING "password"::VARCHAR(100)',
+            'ALTER TABLE "user" DROP COLUMN "avatar"',
+            'ALTER TABLE "user" ALTER COLUMN "is_superuser" TYPE BOOL USING "is_superuser"::BOOL',
+            'ALTER TABLE "user" ALTER COLUMN "last_login" TYPE TIMESTAMPTZ USING "last_login"::TIMESTAMPTZ',
+            'ALTER TABLE "user" ALTER COLUMN "intro" TYPE TEXT USING "intro"::TEXT',
+            'ALTER TABLE "user" ALTER COLUMN "is_active" TYPE BOOL USING "is_active"::BOOL',
+            'ALTER TABLE "user" ALTER COLUMN "longitude" TYPE DECIMAL(10,8) USING "longitude"::DECIMAL(10,8)',
+            'CREATE INDEX "idx_product_name_869427" ON "product" ("name", "type_db_alias")',
+            'CREATE INDEX "idx_email_email_4a1a33" ON "email" ("email")',
+            'CREATE TABLE "email_user" (\n    "email_id" INT NOT NULL REFERENCES "email" ("email_id") ON DELETE CASCADE,\n    "user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE\n)',
+            'CREATE TABLE IF NOT EXISTS "newmodel" (\n    "id" SERIAL NOT NULL PRIMARY KEY,\n    "name" VARCHAR(50) NOT NULL\n);\nCOMMENT ON COLUMN "config"."user_id" IS \'User\';',
+            'CREATE UNIQUE INDEX "uid_product_name_869427" ON "product" ("name", "type_db_alias")',
+            'CREATE UNIQUE INDEX "uid_user_usernam_9987ab" ON "user" ("username")',
+        }
+        expected_downgrade_operators = {
+            'ALTER TABLE "category" ALTER COLUMN "name" SET NOT NULL',
+            'ALTER TABLE "category" ALTER COLUMN "slug" TYPE VARCHAR(200) USING "slug"::VARCHAR(200)',
+            'ALTER TABLE "category" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
+            'ALTER TABLE "config" ALTER COLUMN "status" SET DEFAULT 1',
+            'ALTER TABLE "config" DROP COLUMN "user_id"',
+            'ALTER TABLE "config" DROP CONSTRAINT "fk_config_user_17daa970"',
+            'ALTER TABLE "config" RENAME TO "configs"',
+            'ALTER TABLE "config" ALTER COLUMN "value" TYPE JSONB USING "value"::JSONB',
+            'ALTER TABLE "email" ADD "user_id" INT NOT NULL',
+            'ALTER TABLE "email" DROP COLUMN "address"',
+            'ALTER TABLE "email" RENAME COLUMN "email_id" TO "id"',
+            'ALTER TABLE "email" ALTER COLUMN "is_primary" TYPE BOOL USING "is_primary"::BOOL',
+            'ALTER TABLE "product" ALTER COLUMN "view_num" DROP DEFAULT',
+            'ALTER TABLE "product" RENAME COLUMN "pic" TO "image"',
+            'ALTER TABLE "user" ADD "avatar" VARCHAR(200) NOT NULL  DEFAULT \'\'',
+            'ALTER TABLE "user" ALTER COLUMN "password" TYPE VARCHAR(200) USING "password"::VARCHAR(200)',
+            'ALTER TABLE "user" ALTER COLUMN "last_login" TYPE TIMESTAMPTZ USING "last_login"::TIMESTAMPTZ',
+            'ALTER TABLE "user" ALTER COLUMN "is_superuser" TYPE BOOL USING "is_superuser"::BOOL',
+            'ALTER TABLE "user" ALTER COLUMN "is_active" TYPE BOOL USING "is_active"::BOOL',
+            'ALTER TABLE "user" ALTER COLUMN "intro" TYPE TEXT USING "intro"::TEXT',
+            'ALTER TABLE "user" ALTER COLUMN "longitude" TYPE DECIMAL(12,9) USING "longitude"::DECIMAL(12,9)',
+            'ALTER TABLE "product" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
+            'ALTER TABLE "product" ALTER COLUMN "is_reviewed" TYPE BOOL USING "is_reviewed"::BOOL',
+            'ALTER TABLE "product" ALTER COLUMN "body" TYPE TEXT USING "body"::TEXT',
+            'DROP INDEX "idx_product_name_869427"',
+            'DROP INDEX "idx_email_email_4a1a33"',
+            'DROP INDEX "idx_user_usernam_9987ab"',
+            'DROP INDEX "uid_product_name_869427"',
+            'DROP TABLE IF EXISTS "email_user"',
+            'DROP TABLE IF EXISTS "newmodel"',
+        }
         assert not set(Migrate.upgrade_operators).symmetric_difference(expected_upgrade_operators)
         assert not set(Migrate.downgrade_operators).symmetric_difference(
             expected_downgrade_operators