refactor: avoid updating inited config file (#402)

* refactor: avoid updating config file if init config items not changed

* fix unittest error with tortoise develop branch

* Remove extra space

* fix mysql test error

* fix mysql create index error

aerich/cli.py

@@ -157,6 +157,19 @@ async def history(ctx: Context) -> None:
         click.secho(version, fg=Color.green)
 
 
+def _write_config(config_path, doc, table) -> None:
+    try:
+        import tomli_w as tomlkit
+    except ImportError:
+        import tomlkit  # type: ignore
+
+    try:
+        doc["tool"]["aerich"] = table
+    except KeyError:
+        doc["tool"] = {"aerich": table}
+    config_path.write_text(tomlkit.dumps(doc))
+
+
 @cli.command(help="Initialize aerich config and create migrations folder.")
 @click.option(
     "-t",
@@ -179,10 +192,6 @@ async def history(ctx: Context) -> None:
 )
 @click.pass_context
 async def init(ctx: Context, tortoise_orm, location, src_folder) -> None:
-    try:
-        import tomli_w as tomlkit
-    except ImportError:
-        import tomlkit  # type: ignore
     config_file = ctx.obj["config_file"]
 
     if os.path.isabs(src_folder):
@@ -197,20 +206,18 @@ async def init(ctx: Context, tortoise_orm, location, src_folder) -> None:
     config_path = Path(config_file)
     content = config_path.read_text("utf-8") if config_path.exists() else "[tool.aerich]"
     doc: dict = tomllib.loads(content)
-    table: dict = getattr(tomlkit, "table", dict)()
-    table["tortoise_orm"] = tortoise_orm
-    table["location"] = location
-    table["src_folder"] = src_folder
-    try:
-        doc["tool"]["aerich"] = table
-    except KeyError:
-        doc["tool"] = {"aerich": table}
-    config_path.write_text(tomlkit.dumps(doc))
+
+    table = {"tortoise_orm": tortoise_orm, "location": location, "src_folder": src_folder}
+    if (aerich_config := doc.get("tool", {}).get("aerich")) and all(
+        aerich_config.get(k) == v for k, v in table.items()
+    ):
+        click.echo(f"Aerich config {config_file} already inited.")
+    else:
+        _write_config(config_path, doc, table)
+        click.secho(f"Success writing aerich config to {config_file}", fg=Color.green)
 
     Path(location).mkdir(parents=True, exist_ok=True)
-
     click.secho(f"Success creating migrations folder {location}", fg=Color.green)
-    click.secho(f"Success writing aerich config to {config_file}", fg=Color.green)
 
 
 @cli.command(help="Generate schema and generate app migration folder.")

aerich/ddl/__init__.py

@@ -1,6 +1,8 @@
+import re
 from enum import Enum
 from typing import Any, List, Type, cast
 
+import tortoise
 from tortoise import BaseDBAsyncClient, Model
 from tortoise.backends.base.schema_generator import BaseSchemaGenerator
 from tortoise.backends.sqlite.schema_generator import SqliteSchemaGenerator
@@ -41,9 +43,11 @@ class BaseDDL:
         self.schema_generator = self.schema_generator_cls(client)
 
     def create_table(self, model: "Type[Model]") -> str:
-        return self.schema_generator._get_table_sql(model, True)["table_creation_string"].rstrip(
-            ";"
-        )
+        schema = self.schema_generator._get_table_sql(model, True)["table_creation_string"]
+        if tortoise.__version__ <= "0.23.0":
+            # Remove extra space
+            schema = re.sub(r'(["()A-Za-z])  (["()A-Za-z])', r"\1 \2", schema)
+        return schema.rstrip(";")
 
     def drop_table(self, table_name: str) -> str:
         return self._DROP_TABLE_TEMPLATE.format(table_name=table_name)
@@ -130,8 +134,6 @@ class BaseDDL:
                 else ""
             )
             template = self._ADD_COLUMN_TEMPLATE
-        return template.format(
-            table_name=db_table,
         column = self.schema_generator._create_string(
             db_column=db_column,
             field_type=db_field_types.get(self.DIALECT, db_field_types.get("")),
@@ -148,8 +150,10 @@ class BaseDDL:
             ),
             is_primary_key=is_pk,
             default=default,
-            ),
         )
+        if tortoise.__version__ <= "0.23.0":
+            column = column.replace("  ", " ")
+        return template.format(table_name=db_table, column=column)
 
     def drop_column(self, model: "Type[Model]", column_name: str) -> str:
         return self._DROP_COLUMN_TEMPLATE.format(

conftest.py

@@ -61,7 +61,17 @@ async def initialize_tests(event_loop, request) -> None:
     with contextlib.suppress(DBConnectionError, OperationalError):
         await Tortoise._drop_databases()
     await Tortoise.init(config=tortoise_orm, _create_db=True)
+    try:
         await generate_schema_for_client(Tortoise.get_connection("default"), safe=True)
+    except OperationalError as e:
+        if (s := "IF NOT EXISTS") not in str(e):
+            raise e
+        # MySQL does not support `CREATE INDEX IF NOT EXISTS` syntax
+        client = Tortoise.get_connection("default")
+        generator = client.schema_generator(client)
+        schema = generator.get_create_schema_sql(safe=True)
+        schema = schema.replace(f" INDEX {s}", " INDEX")
+        await generator.generate_from_string(schema)
 
     client = Tortoise.get_connection("default")
     if client.schema_generator is MySQLSchemaGenerator:

tests/test_sqlite_migrate.py

@@ -181,7 +181,11 @@ def test_sqlite_migrate(tmp_path: Path) -> None:
         if (db_file := Path("db.sqlite3")).exists():
             db_file.unlink()
         run_aerich("aerich init -t settings.TORTOISE_ORM")
+        config_file = Path("pyproject.toml")
+        modify_time = config_file.stat().st_mtime
         run_aerich("aerich init-db")
+        run_aerich("aerich init -t settings.TORTOISE_ORM")
+        assert modify_time == config_file.stat().st_mtime
         r = run_shell("pytest _test.py::test_allow_duplicate")
         assert r.returncode == 0
         # Add index