init

alice/backends/__init__.py

@@ -0,0 +1,36 @@
+from typing import Type
+
+from tortoise import Model, BaseDBAsyncClient
+from tortoise.backends.base.schema_generator import BaseSchemaGenerator
+
+
+class DDL:
+    schema_generator_cls: Type[BaseSchemaGenerator] = BaseSchemaGenerator
+
+    def __init__(self, client: "BaseDBAsyncClient", model: "Type[Model]"):
+        self.model = model
+        self.schema_generator = self.schema_generator_cls(client)
+
+    def create_table(self):
+        return self.schema_generator._get_table_sql(self.model, True)['table_creation_string']
+
+    def drop_table(self):
+        return f'drop table {self.model._meta.db_table}'
+
+    def add_column(self):
+        raise NotImplementedError()
+
+    def drop_column(self):
+        raise NotImplementedError()
+
+    def add_index(self):
+        raise NotImplementedError()
+
+    def drop_index(self):
+        raise NotImplementedError()
+
+    def add_fk(self):
+        raise NotImplementedError()
+
+    def drop_fk(self):
+        raise NotImplementedError()

alice/backends/mysql/__init__.py

@@ -0,0 +1,28 @@
+from tortoise.backends.mysql.schema_generator import MySQLSchemaGenerator
+
+from alice.backends import DDL
+
+
+class MysqlDDL(DDL):
+    schema_generator_cls = MySQLSchemaGenerator
+
+    def drop_table(self):
+        pass
+
+    def add_column(self):
+        pass
+
+    def drop_column(self):
+        pass
+
+    def add_index(self):
+        pass
+
+    def drop_index(self):
+        pass
+
+    def add_fk(self):
+        pass
+
+    def drop_fk(self):
+        pass