258 lines
11 KiB
Python
258 lines
11 KiB
Python
from enum import Enum
|
|
from typing import Any, List, Type, cast
|
|
|
|
from tortoise import BaseDBAsyncClient, Model
|
|
from tortoise.backends.base.schema_generator import BaseSchemaGenerator
|
|
|
|
from aerich.utils import is_default_function
|
|
|
|
|
|
class BaseDDL:
|
|
schema_generator_cls: Type[BaseSchemaGenerator] = BaseSchemaGenerator
|
|
DIALECT = "sql"
|
|
_DROP_TABLE_TEMPLATE = 'DROP TABLE IF EXISTS "{table_name}"'
|
|
_ADD_COLUMN_TEMPLATE = 'ALTER TABLE "{table_name}" ADD {column}'
|
|
_DROP_COLUMN_TEMPLATE = 'ALTER TABLE "{table_name}" DROP COLUMN "{column_name}"'
|
|
_ALTER_DEFAULT_TEMPLATE = 'ALTER TABLE "{table_name}" ALTER COLUMN "{column}" {default}'
|
|
_RENAME_COLUMN_TEMPLATE = (
|
|
'ALTER TABLE "{table_name}" RENAME COLUMN "{old_column_name}" TO "{new_column_name}"'
|
|
)
|
|
_ADD_INDEX_TEMPLATE = (
|
|
'ALTER TABLE "{table_name}" ADD {unique}INDEX "{index_name}" ({column_names})'
|
|
)
|
|
_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}" (\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}'
|
|
)
|
|
_RENAME_TABLE_TEMPLATE = 'ALTER TABLE "{old_table_name}" RENAME TO "{new_table_name}"'
|
|
|
|
def __init__(self, client: "BaseDBAsyncClient") -> None:
|
|
self.client = client
|
|
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(
|
|
";"
|
|
)
|
|
|
|
def drop_table(self, table_name: str) -> str:
|
|
return self._DROP_TABLE_TEMPLATE.format(table_name=table_name)
|
|
|
|
def create_m2m(
|
|
self, model: "Type[Model]", field_describe: dict, reference_table_describe: dict
|
|
) -> str:
|
|
through = cast(str, field_describe.get("through"))
|
|
description = field_describe.get("description")
|
|
pk_field = cast(dict, reference_table_describe.get("pk_field"))
|
|
reference_id = pk_field.get("db_column")
|
|
db_field_types = cast(dict, pk_field.get("db_field_types"))
|
|
return self._M2M_TABLE_TEMPLATE.format(
|
|
table_name=through,
|
|
backward_table=model._meta.db_table,
|
|
forward_table=reference_table_describe.get("table"),
|
|
backward_field=model._meta.db_pk_column,
|
|
forward_field=reference_id,
|
|
backward_key=field_describe.get("backward_key"),
|
|
backward_type=model._meta.pk.get_for_dialect(self.DIALECT, "SQL_TYPE"),
|
|
forward_key=field_describe.get("forward_key"),
|
|
forward_type=db_field_types.get(self.DIALECT) or db_field_types.get(""),
|
|
on_delete=field_describe.get("on_delete"),
|
|
extra=self.schema_generator._table_generate_extra(table=through),
|
|
comment=(
|
|
self.schema_generator._table_comment_generator(table=through, comment=description)
|
|
if description
|
|
else ""
|
|
),
|
|
)
|
|
|
|
def drop_m2m(self, table_name: str) -> str:
|
|
return self._DROP_TABLE_TEMPLATE.format(table_name=table_name)
|
|
|
|
def _get_default(self, model: "Type[Model]", field_describe: dict) -> Any:
|
|
db_table = model._meta.db_table
|
|
default = field_describe.get("default")
|
|
if isinstance(default, Enum):
|
|
default = default.value
|
|
db_column = cast(str, field_describe.get("db_column"))
|
|
auto_now_add = field_describe.get("auto_now_add", False)
|
|
auto_now = field_describe.get("auto_now", False)
|
|
if default is not None or auto_now_add:
|
|
if field_describe.get("field_type") in [
|
|
"UUIDField",
|
|
"TextField",
|
|
"JSONField",
|
|
] or is_default_function(default):
|
|
default = ""
|
|
else:
|
|
try:
|
|
default = self.schema_generator._column_default_generator(
|
|
db_table,
|
|
db_column,
|
|
self.schema_generator._escape_default_value(default),
|
|
auto_now_add,
|
|
auto_now,
|
|
)
|
|
except NotImplementedError:
|
|
default = ""
|
|
else:
|
|
default = None
|
|
return default
|
|
|
|
def add_column(self, model: "Type[Model]", field_describe: dict, is_pk: bool = False) -> str:
|
|
return self._add_or_modify_column(model, field_describe, is_pk)
|
|
|
|
def _add_or_modify_column(self, model, field_describe: dict, is_pk: bool, modify=False) -> str:
|
|
db_table = model._meta.db_table
|
|
description = field_describe.get("description")
|
|
db_column = cast(str, field_describe.get("db_column"))
|
|
db_field_types = cast(dict, field_describe.get("db_field_types"))
|
|
default = self._get_default(model, field_describe)
|
|
if default is None:
|
|
default = ""
|
|
if modify:
|
|
unique = ""
|
|
template = self._MODIFY_COLUMN_TEMPLATE
|
|
else:
|
|
unique = "UNIQUE" if field_describe.get("unique") 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("")),
|
|
nullable="NOT NULL" if not field_describe.get("nullable") else "",
|
|
unique=unique,
|
|
comment=(
|
|
self.schema_generator._column_comment_generator(
|
|
table=db_table,
|
|
column=db_column,
|
|
comment=description,
|
|
)
|
|
if description
|
|
else ""
|
|
),
|
|
is_primary_key=is_pk,
|
|
default=default,
|
|
),
|
|
)
|
|
|
|
def drop_column(self, model: "Type[Model]", column_name: str) -> str:
|
|
return self._DROP_COLUMN_TEMPLATE.format(
|
|
table_name=model._meta.db_table, column_name=column_name
|
|
)
|
|
|
|
def modify_column(self, model: "Type[Model]", field_describe: dict, is_pk: bool = False) -> str:
|
|
return self._add_or_modify_column(model, field_describe, is_pk, modify=True)
|
|
|
|
def rename_column(
|
|
self, model: "Type[Model]", old_column_name: str, new_column_name: str
|
|
) -> str:
|
|
return self._RENAME_COLUMN_TEMPLATE.format(
|
|
table_name=model._meta.db_table,
|
|
old_column_name=old_column_name,
|
|
new_column_name=new_column_name,
|
|
)
|
|
|
|
def change_column(
|
|
self, model: "Type[Model]", old_column_name: str, new_column_name: str, new_column_type: str
|
|
) -> str:
|
|
return self._CHANGE_COLUMN_TEMPLATE.format(
|
|
table_name=model._meta.db_table,
|
|
old_column_name=old_column_name,
|
|
new_column_name=new_column_name,
|
|
new_column_type=new_column_type,
|
|
)
|
|
|
|
def add_index(self, model: "Type[Model]", field_names: List[str], unique=False) -> str:
|
|
return self._ADD_INDEX_TEMPLATE.format(
|
|
unique="UNIQUE " if unique else "",
|
|
index_name=self.schema_generator._generate_index_name(
|
|
"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),
|
|
)
|
|
|
|
def drop_index(self, model: "Type[Model]", field_names: List[str], unique=False) -> str:
|
|
return self._DROP_INDEX_TEMPLATE.format(
|
|
index_name=self.schema_generator._generate_index_name(
|
|
"idx" if not unique else "uid", model, field_names
|
|
),
|
|
table_name=model._meta.db_table,
|
|
)
|
|
|
|
def drop_index_by_name(self, model: "Type[Model]", index_name: str) -> str:
|
|
return self._DROP_INDEX_TEMPLATE.format(
|
|
index_name=index_name,
|
|
table_name=model._meta.db_table,
|
|
)
|
|
|
|
def _generate_fk_name(
|
|
self, db_table, field_describe: dict, reference_table_describe: dict
|
|
) -> str:
|
|
"""Generate fk name"""
|
|
db_column = cast(str, field_describe.get("raw_field"))
|
|
pk_field = cast(dict, reference_table_describe.get("pk_field"))
|
|
to_field = cast(str, pk_field.get("db_column"))
|
|
to_table = cast(str, reference_table_describe.get("table"))
|
|
return self.schema_generator._generate_fk_name(
|
|
from_table=db_table,
|
|
from_field=db_column,
|
|
to_table=to_table,
|
|
to_field=to_field,
|
|
)
|
|
|
|
def add_fk(
|
|
self, model: "Type[Model]", field_describe: dict, reference_table_describe: dict
|
|
) -> str:
|
|
db_table = model._meta.db_table
|
|
|
|
db_column = field_describe.get("raw_field")
|
|
pk_field = cast(dict, reference_table_describe.get("pk_field"))
|
|
reference_id = pk_field.get("db_column")
|
|
return self._ADD_FK_TEMPLATE.format(
|
|
table_name=db_table,
|
|
fk_name=self._generate_fk_name(db_table, field_describe, reference_table_describe),
|
|
db_column=db_column,
|
|
table=reference_table_describe.get("table"),
|
|
field=reference_id,
|
|
on_delete=field_describe.get("on_delete"),
|
|
)
|
|
|
|
def drop_fk(
|
|
self, model: "Type[Model]", field_describe: dict, reference_table_describe: dict
|
|
) -> str:
|
|
db_table = model._meta.db_table
|
|
fk_name = self._generate_fk_name(db_table, field_describe, reference_table_describe)
|
|
return self._DROP_FK_TEMPLATE.format(table_name=db_table, fk_name=fk_name)
|
|
|
|
def alter_column_default(self, model: "Type[Model]", field_describe: dict) -> str:
|
|
db_table = model._meta.db_table
|
|
default = self._get_default(model, field_describe)
|
|
return self._ALTER_DEFAULT_TEMPLATE.format(
|
|
table_name=db_table,
|
|
column=field_describe.get("db_column"),
|
|
default="SET" + default if default is not None else "DROP DEFAULT",
|
|
)
|
|
|
|
def alter_column_null(self, model: "Type[Model]", field_describe: dict) -> str:
|
|
return self.modify_column(model, field_describe)
|
|
|
|
def set_comment(self, model: "Type[Model]", field_describe: dict) -> str:
|
|
return self.modify_column(model, field_describe)
|
|
|
|
def rename_table(self, model: "Type[Model]", old_table_name: str, new_table_name: str) -> str:
|
|
db_table = model._meta.db_table
|
|
return self._RENAME_TABLE_TEMPLATE.format(
|
|
table_name=db_table, old_table_name=old_table_name, new_table_name=new_table_name
|
|
)
|