Fix upgrade error when migrate

CHANGELOG.rst

@@ -4,6 +4,10 @@ ChangeLog
 
 0.1
 ===
+0.1.8
+_____
+- Fix upgrade error when migrate.
+
 0.1.7
 -----
 - Exclude models.Aerich.

aerich/__init__.py

@@ -1 +1 @@
-__version__ = "0.1.7"
+__version__ = "0.1.8"

aerich/cli.py

@@ -7,6 +7,7 @@ from enum import Enum
 import asyncclick as click
 from asyncclick import Context, UsageError
 from tortoise import Tortoise, generate_schema_for_client
+from tortoise.exceptions import OperationalError
 from tortoise.transactions import in_transaction
 from tortoise.utils import get_schema_sql
 
@@ -86,7 +87,11 @@ async def upgrade(ctx: Context):
     app = ctx.obj["app"]
     migrated = False
     for version in Migrate.get_all_version_files():
-        if not await Aerich.exists(version=version, app=app):
+        try:
+            exists = await Aerich.exists(version=version, app=app)
+        except OperationalError:
+            exists = False
+        if not exists:
             async with in_transaction(get_app_connection_name(config, app)) as conn:
                 file_path = os.path.join(Migrate.migrate_location, version)
                 with open(file_path, "r") as f:
@@ -159,7 +164,7 @@ def history(ctx):
 )
 @click.pass_context
 async def init(
-    ctx: Context, tortoise_orm, location,
+        ctx: Context, tortoise_orm, location,
 ):
     config_file = ctx.obj["config_file"]
     name = ctx.obj["name"]

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "aerich"
-version = "0.1.7"
+version = "0.1.8"
 description = "A database migrations tool for Tortoise ORM."
 authors = ["long2ice <long2ice@gmail.com>"]