28 lines
1.7 KiB
Python
28 lines
1.7 KiB
Python
from tortoise.backends.mysql.schema_generator import MySQLSchemaGenerator
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from aerich.ddl import BaseDDL
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class MysqlDDL(BaseDDL):
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schema_generator_cls = MySQLSchemaGenerator
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DIALECT = MySQLSchemaGenerator.DIALECT
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_DROP_TABLE_TEMPLATE = "DROP TABLE IF EXISTS `{table_name}`"
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_ADD_COLUMN_TEMPLATE = "ALTER TABLE `{table_name}` ADD {column}"
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_ALTER_DEFAULT_TEMPLATE = "ALTER TABLE `{table_name}` ALTER COLUMN `{column}` {default}"
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_CHANGE_COLUMN_TEMPLATE = (
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"ALTER TABLE `{table_name}` CHANGE {old_column_name} {new_column_name} {new_column_type}"
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)
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_DROP_COLUMN_TEMPLATE = "ALTER TABLE `{table_name}` DROP COLUMN `{column_name}`"
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_RENAME_COLUMN_TEMPLATE = (
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"ALTER TABLE `{table_name}` RENAME COLUMN `{old_column_name}` TO `{new_column_name}`"
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)
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_ADD_INDEX_TEMPLATE = (
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"ALTER TABLE `{table_name}` ADD {unique}INDEX `{index_name}` ({column_names})"
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)
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_DROP_INDEX_TEMPLATE = "ALTER TABLE `{table_name}` DROP INDEX `{index_name}`"
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_ADD_FK_TEMPLATE = "ALTER TABLE `{table_name}` ADD CONSTRAINT `{fk_name}` FOREIGN KEY (`{db_column}`) REFERENCES `{table}` (`{field}`) ON DELETE {on_delete}"
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_DROP_FK_TEMPLATE = "ALTER TABLE `{table_name}` DROP FOREIGN KEY `{fk_name}`"
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_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}"
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_MODIFY_COLUMN_TEMPLATE = "ALTER TABLE `{table_name}` MODIFY COLUMN {column}"
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_RENAME_TABLE_TEMPLATE = "ALTER TABLE `{old_table_name}` RENAME TO `{new_table_name}`"
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