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# ext/mypy/names.py
# Copyright (C) 2021 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php
from typing import List
from mypy.nodes import ClassDef
from mypy.nodes import Expression
from mypy.nodes import FuncDef
from mypy.nodes import RefExpr
from mypy.nodes import SymbolNode
from mypy.nodes import TypeAlias
from mypy.nodes import TypeInfo
from mypy.nodes import Union
from mypy.plugin import SemanticAnalyzerPluginInterface
from mypy.types import UnboundType
from ... import util
COLUMN = util.symbol("COLUMN")
RELATIONSHIP = util.symbol("RELATIONSHIP")
REGISTRY = util.symbol("REGISTRY")
COLUMN_PROPERTY = util.symbol("COLUMN_PROPERTY")
TYPEENGINE = util.symbol("TYPEENGNE")
MAPPED = util.symbol("MAPPED")
DECLARATIVE_BASE = util.symbol("DECLARATIVE_BASE")
DECLARATIVE_META = util.symbol("DECLARATIVE_META")
MAPPED_DECORATOR = util.symbol("MAPPED_DECORATOR")
COLUMN_PROPERTY = util.symbol("COLUMN_PROPERTY")
SYNONYM_PROPERTY = util.symbol("SYNONYM_PROPERTY")
COMPOSITE_PROPERTY = util.symbol("COMPOSITE_PROPERTY")
DECLARED_ATTR = util.symbol("DECLARED_ATTR")
MAPPER_PROPERTY = util.symbol("MAPPER_PROPERTY")
AS_DECLARATIVE = util.symbol("AS_DECLARATIVE")
AS_DECLARATIVE_BASE = util.symbol("AS_DECLARATIVE_BASE")
DECLARATIVE_MIXIN = util.symbol("DECLARATIVE_MIXIN")
_lookup = {
"Column": (
COLUMN,
{
"sqlalchemy.sql.schema.Column",
"sqlalchemy.sql.Column",
},
),
"RelationshipProperty": (
RELATIONSHIP,
{
"sqlalchemy.orm.relationships.RelationshipProperty",
"sqlalchemy.orm.RelationshipProperty",
},
),
"registry": (
REGISTRY,
{
"sqlalchemy.orm.decl_api.registry",
"sqlalchemy.orm.registry",
},
),
"ColumnProperty": (
COLUMN_PROPERTY,
{
"sqlalchemy.orm.properties.ColumnProperty",
"sqlalchemy.orm.ColumnProperty",
},
),
"SynonymProperty": (
SYNONYM_PROPERTY,
{
"sqlalchemy.orm.descriptor_props.SynonymProperty",
"sqlalchemy.orm.SynonymProperty",
},
),
"CompositeProperty": (
COMPOSITE_PROPERTY,
{
"sqlalchemy.orm.descriptor_props.CompositeProperty",
"sqlalchemy.orm.CompositeProperty",
},
),
"MapperProperty": (
MAPPER_PROPERTY,
{
"sqlalchemy.orm.interfaces.MapperProperty",
"sqlalchemy.orm.MapperProperty",
},
),
"TypeEngine": (TYPEENGINE, {"sqlalchemy.sql.type_api.TypeEngine"}),
"Mapped": (MAPPED, {"sqlalchemy.orm.attributes.Mapped"}),
"declarative_base": (
DECLARATIVE_BASE,
{
"sqlalchemy.ext.declarative.declarative_base",
"sqlalchemy.orm.declarative_base",
"sqlalchemy.orm.decl_api.declarative_base",
},
),
"DeclarativeMeta": (
DECLARATIVE_META,
{
"sqlalchemy.ext.declarative.DeclarativeMeta",
"sqlalchemy.orm.DeclarativeMeta",
"sqlalchemy.orm.decl_api.DeclarativeMeta",
},
),
"mapped": (
MAPPED_DECORATOR,
{
"sqlalchemy.orm.decl_api.registry.mapped",
"sqlalchemy.orm.registry.mapped",
},
),
"as_declarative": (
AS_DECLARATIVE,
{
"sqlalchemy.ext.declarative.as_declarative",
"sqlalchemy.orm.decl_api.as_declarative",
"sqlalchemy.orm.as_declarative",
},
),
"as_declarative_base": (
AS_DECLARATIVE_BASE,
{
"sqlalchemy.orm.decl_api.registry.as_declarative_base",
"sqlalchemy.orm.registry.as_declarative_base",
},
),
"declared_attr": (
DECLARED_ATTR,
{
"sqlalchemy.orm.decl_api.declared_attr",
"sqlalchemy.orm.declared_attr",
},
),
"declarative_mixin": (
DECLARATIVE_MIXIN,
{
"sqlalchemy.orm.decl_api.declarative_mixin",
"sqlalchemy.orm.declarative_mixin",
},
),
}
def _mro_has_id(mro: List[TypeInfo], type_id: int):
for mr in mro:
check_type_id, fullnames = _lookup.get(mr.name, (None, None))
if check_type_id == type_id:
break
else:
return False
return mr.fullname in fullnames
def _type_id_for_unbound_type(
type_: UnboundType, cls: ClassDef, api: SemanticAnalyzerPluginInterface
) -> int:
type_id = None
sym = api.lookup_qualified(type_.name, type_)
if sym is not None:
if isinstance(sym.node, TypeAlias):
type_id = _type_id_for_named_node(sym.node.target.type)
elif isinstance(sym.node, TypeInfo):
type_id = _type_id_for_named_node(sym.node)
return type_id
def _type_id_for_callee(callee: Expression) -> int:
if isinstance(callee.node, FuncDef):
return _type_id_for_funcdef(callee.node)
elif isinstance(callee.node, TypeAlias):
type_id = _type_id_for_fullname(callee.node.target.type.fullname)
elif isinstance(callee.node, TypeInfo):
type_id = _type_id_for_named_node(callee)
else:
type_id = None
return type_id
def _type_id_for_funcdef(node: FuncDef) -> int:
if hasattr(node.type.ret_type, "type"):
type_id = _type_id_for_fullname(node.type.ret_type.type.fullname)
else:
type_id = None
return type_id
def _type_id_for_named_node(node: Union[RefExpr, SymbolNode]) -> int:
type_id, fullnames = _lookup.get(node.name, (None, None))
if type_id is None:
return None
elif node.fullname in fullnames:
return type_id
else:
return None
def _type_id_for_fullname(fullname: str) -> int:
tokens = fullname.split(".")
immediate = tokens[-1]
type_id, fullnames = _lookup.get(immediate, (None, None))
if type_id is None:
return None
elif fullname in fullnames:
return type_id
else:
return None
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