ormar/models/newbasemodel.py
import base64
import sys
import warnings
from typing import (
TYPE_CHECKING,
AbstractSet,
Any,
Dict,
List,
Literal,
Mapping,
MutableSequence,
Optional,
Set,
Tuple,
Type,
TypeVar,
Union,
cast,
)
import pydantic
import sqlalchemy
import typing_extensions
import ormar # noqa I100
from ormar.exceptions import ModelError, ModelPersistenceError
from ormar.fields.foreign_key import ForeignKeyField
from ormar.fields.parsers import decode_bytes, encode_json
from ormar.models.helpers import register_relation_in_alias_manager
from ormar.models.helpers.relations import expand_reverse_relationship
from ormar.models.helpers.sqlalchemy import (
populate_config_sqlalchemy_table_if_required,
update_column_definition,
)
from ormar.models.metaclass import ModelMetaclass
from ormar.models.modelproxy import ModelTableProxy
from ormar.models.utils import Extra
from ormar.queryset.utils import translate_list_to_dict
from ormar.relations.alias_manager import AliasManager
from ormar.relations.relation import Relation
from ormar.relations.relation_manager import RelationsManager
from ormar.warnings import OrmarDeprecatedSince020
if TYPE_CHECKING: # pragma no cover
from ormar.models import Model, OrmarConfig
from ormar.signals import SignalEmitter
T = TypeVar("T", bound="NewBaseModel")
IntStr = Union[int, str]
DictStrAny = Dict[str, Any]
SetStr = Set[str]
AbstractSetIntStr = AbstractSet[IntStr]
MappingIntStrAny = Mapping[IntStr, Any]
class NewBaseModel(pydantic.BaseModel, ModelTableProxy, metaclass=ModelMetaclass):
"""
Main base class of ormar Model.
Inherits from pydantic BaseModel and has all mixins combined in ModelTableProxy.
Constructed with ModelMetaclass which in turn also inherits pydantic metaclass.
Abstracts away all internals and helper functions, so final Model class has only
the logic concerned with database connection and data persistence.
"""
__slots__ = (
"_orm_id",
"_orm_saved",
"_orm",
"_pk_column",
"__pk_only__",
"__cached_hash__",
"__pydantic_extra__",
"__pydantic_fields_set__",
)
if TYPE_CHECKING: # pragma no cover
pk: Any
__relation_map__: Optional[List[str]]
__cached_hash__: Optional[int]
_orm_relationship_manager: AliasManager
_orm: RelationsManager
_orm_id: int
_orm_saved: bool
_related_names: Optional[Set]
_through_names: Optional[Set]
_related_names_hash: str
_quick_access_fields: Set
_json_fields: Set
_bytes_fields: Set
ormar_config: OrmarConfig
# noinspection PyMissingConstructor
def __init__(self, *args: Any, **kwargs: Any) -> None: # type: ignore
"""
Initializer that creates a new ormar Model that is also pydantic Model at the
same time.
Passed keyword arguments can be only field names and their corresponding values
as those will be passed to pydantic validation that will complain if extra
params are passed.
If relations are defined each relation is expanded and children models are also
initialized and validated. Relation from both sides is registered so you can
access related models from both sides.
Json fields are automatically loaded/dumped if needed.
Models marked as abstract=True in internal OrmarConfig cannot be initialized.
Accepts also special __pk_only__ flag that indicates that Model is constructed
only with primary key value (so no other fields, it's a child model on other
Model), that causes skipping the validation, that's the only case when the
validation can be skipped.
Accepts also special __excluded__ parameter that contains a set of fields that
should be explicitly set to None, as otherwise pydantic will try to populate
them with their default values if default is set.
:raises ModelError: if abstract model is initialized, model has ForwardRefs
that has not been updated or unknown field is passed
:param args: ignored args
:type args: Any
:param kwargs: keyword arguments - all fields values and some special params
:type kwargs: Any
"""
self._verify_model_can_be_initialized()
self._initialize_internal_attributes()
pk_only = kwargs.pop("__pk_only__", False)
object.__setattr__(self, "__pk_only__", pk_only)
new_kwargs, through_tmp_dict = self._process_kwargs(kwargs)
if not pk_only:
self.__pydantic_validator__.validate_python(
new_kwargs, self_instance=self # type: ignore
)
else:
fields_set = {self.ormar_config.pkname}
values = new_kwargs
object.__setattr__(self, "__dict__", values)
object.__setattr__(self, "__pydantic_fields_set__", fields_set)
# add back through fields
new_kwargs.update(through_tmp_dict)
model_fields = object.__getattribute__(self, "ormar_config").model_fields
# register the columns models after initialization
for related in self.extract_related_names().union(self.extract_through_names()):
model_fields[related].expand_relationship(
new_kwargs.get(related), self, to_register=True
)
def __setattr__(self, name: str, value: Any) -> None: # noqa CCR001
"""
Overwrites setattr in pydantic parent as otherwise descriptors are not called.
:param name: name of the attribute to set
:type name: str
:param value: value of the attribute to set
:type value: Any
:return: None
:rtype: None
"""
prev_hash = hash(self)
if hasattr(self, name):
object.__setattr__(self, name, value)
else:
# let pydantic handle errors for unknown fields
super().__setattr__(name, value)
# In this case, the hash could have changed, so update it
if name == self.ormar_config.pkname or self.pk is None:
object.__setattr__(self, "__cached_hash__", None)
new_hash = hash(self)
if prev_hash != new_hash:
self._update_relation_cache(prev_hash, new_hash)
def __getattr__(self, item: str) -> Any:
"""
Used for private attributes of pydantic v2.
:param item: name of attribute
:type item: str
:return: Any
:rtype: Any
"""
# TODO: Check __pydantic_extra__
if item == "__pydantic_extra__":
return None
return super().__getattr__(item) # type: ignore
def __getstate__(self) -> Dict[Any, Any]:
state = super().__getstate__()
self_dict = self.model_dump()
state["__dict__"].update(**self_dict)
return state
def __setstate__(self, state: Dict[Any, Any]) -> None:
relations = {
k: v
for k, v in state["__dict__"].items()
if k in self.extract_related_names()
}
basic_state = {
k: v
for k, v in state["__dict__"].items()
if k not in self.extract_related_names()
}
state["__dict__"] = basic_state
super().__setstate__(state)
self._initialize_internal_attributes()
for name, value in relations.items():
setattr(self, name, value)
def _update_relation_cache(self, prev_hash: int, new_hash: int) -> None:
"""
Update all relation proxy caches with different hash if we have changed
:param prev_hash: The previous hash to update
:type prev_hash: int
:param new_hash: The hash to update to
:type new_hash: int
"""
def _update_cache(relations: List[Relation], recurse: bool = True) -> None:
for relation in relations:
relation_proxy = relation.get()
if hasattr(relation_proxy, "update_cache"):
relation_proxy.update_cache(prev_hash, new_hash) # type: ignore
elif recurse and hasattr(relation_proxy, "_orm"):
_update_cache(
relation_proxy._orm._relations.values(), # type: ignore
recurse=False,
)
_update_cache(list(self._orm._relations.values()))
def _internal_set(self, name: str, value: Any) -> None:
"""
Delegates call to pydantic.
:param name: name of param
:type name: str
:param value: value to set
:type value: Any
"""
super().__setattr__(name, value)
def _verify_model_can_be_initialized(self) -> None:
"""
Raises exception if model is abstract or has ForwardRefs in relation fields.
:return: None
:rtype: None
"""
if self.ormar_config.abstract:
raise ModelError(f"You cannot initialize abstract model {self.get_name()}")
if self.ormar_config.requires_ref_update:
raise ModelError(
f"Model {self.get_name()} has not updated "
f"ForwardRefs. \nBefore using the model you "
f"need to call update_forward_refs()."
)
def _process_kwargs(self, kwargs: Dict) -> Tuple[Dict, Dict]: # noqa: CCR001
"""
Initializes nested models.
Removes property_fields
Checks if field is in the model fields or pydantic fields.
Nullifies fields that should be excluded.
Extracts through models from kwargs into temporary dict.
:param kwargs: passed to init keyword arguments
:type kwargs: Dict
:return: modified kwargs
:rtype: Tuple[Dict, Dict]
"""
property_fields = self.ormar_config.property_fields
model_fields = self.ormar_config.model_fields
pydantic_fields = set(self.model_fields.keys())
# remove property fields
for prop_filed in property_fields:
kwargs.pop(prop_filed, None)
excluded: Set[str] = kwargs.pop("__excluded__", set())
if "pk" in kwargs:
kwargs[self.ormar_config.pkname] = kwargs.pop("pk")
# extract through fields
through_tmp_dict = dict()
for field_name in self.extract_through_names():
through_tmp_dict[field_name] = kwargs.pop(field_name, None)
kwargs = self._remove_extra_parameters_if_they_should_be_ignored(
kwargs=kwargs, model_fields=model_fields, pydantic_fields=pydantic_fields
)
try:
new_kwargs: Dict[str, Any] = {
k: self._convert_to_bytes(
k,
self._convert_json(
k,
(
model_fields[k].expand_relationship(
v, self, to_register=False
)
if k in model_fields
else (v if k in pydantic_fields else model_fields[k])
),
),
)
for k, v in kwargs.items()
}
except KeyError as e:
raise ModelError(
f"Unknown field '{e.args[0]}' for model {self.get_name(lower=False)}"
)
# explicitly set None to excluded fields
# as pydantic populates them with default if set
for field_to_nullify in excluded:
new_kwargs[field_to_nullify] = None
return new_kwargs, through_tmp_dict
def _remove_extra_parameters_if_they_should_be_ignored(
self, kwargs: Dict, model_fields: Dict, pydantic_fields: Set
) -> Dict:
"""
Removes the extra fields from kwargs if they should be ignored.
:param kwargs: passed arguments
:type kwargs: Dict
:param model_fields: dictionary of model fields
:type model_fields: Dict
:param pydantic_fields: set of pydantic fields names
:type pydantic_fields: Set
:return: dict without extra fields
:rtype: Dict
"""
if self.ormar_config.extra == Extra.ignore:
kwargs = {
k: v
for k, v in kwargs.items()
if k in model_fields or k in pydantic_fields
}
return kwargs
def _initialize_internal_attributes(self) -> None:
"""
Initializes internal attributes during __init__()
:rtype: None
"""
# object.__setattr__(self, "_orm_id", uuid.uuid4().hex)
object.__setattr__(self, "_orm_saved", False)
object.__setattr__(self, "_pk_column", None)
object.__setattr__(
self,
"_orm",
RelationsManager(
related_fields=self.extract_related_fields(), owner=cast("Model", self)
),
)
def __eq__(self, other: object) -> bool:
"""
Compares other model to this model. when == is called.
:param other: other model to compare
:type other: object
:return: result of comparison
:rtype: bool
"""
if isinstance(other, NewBaseModel):
return self.__same__(other)
return super().__eq__(other) # pragma no cover
def __hash__(self) -> int:
if getattr(self, "__cached_hash__", None) is not None:
return self.__cached_hash__ or 0
if self.pk is not None:
ret = hash(str(self.pk) + self.__class__.__name__)
else:
vals = {
k: v
for k, v in self.__dict__.items()
if k not in self.extract_related_names()
}
ret = hash(str(vals) + self.__class__.__name__)
object.__setattr__(self, "__cached_hash__", ret)
return ret
def __same__(self, other: "NewBaseModel") -> bool:
"""
Used by __eq__, compares other model to this model.
Compares:
* _orm_ids,
* primary key values if it's set
* dictionary of own fields (excluding relations)
:param other: model to compare to
:type other: NewBaseModel
:return: result of comparison
:rtype: bool
"""
if (self.pk is None and other.pk is not None) or (
self.pk is not None and other.pk is None
):
return False
else:
return hash(self) == other.__hash__()
@classmethod
def get_name(cls, lower: bool = True) -> str:
"""
Returns name of the Model class, by default lowercase.
:param lower: flag if name should be set to lowercase
:type lower: bool
:return: name of the model
:rtype: str
"""
name = cls.__name__
if lower:
name = name.lower()
return name
@property
def pk_column(self) -> sqlalchemy.Column:
"""
Retrieves primary key sqlalchemy column from models OrmarConfig.table.
Each model has to have primary key.
Only one primary key column is allowed.
:return: primary key sqlalchemy column
:rtype: sqlalchemy.Column
"""
if object.__getattribute__(self, "_pk_column") is not None:
return object.__getattribute__(self, "_pk_column")
pk_columns = self.ormar_config.table.primary_key.columns.values()
pk_col = pk_columns[0]
object.__setattr__(self, "_pk_column", pk_col)
return pk_col
@property
def saved(self) -> bool:
"""Saved status of the model. Changed by setattr and loading from db"""
return self._orm_saved
@property
def signals(self) -> "SignalEmitter":
"""Exposes signals from model OrmarConfig"""
return self.ormar_config.signals
@classmethod
def pk_type(cls) -> Any:
"""Shortcut to models primary key field type"""
return cls.ormar_config.model_fields[cls.ormar_config.pkname].__type__
@classmethod
def db_backend_name(cls) -> str:
"""Shortcut to database dialect,
cause some dialect require different treatment"""
return cls.ormar_config.database._backend._dialect.name
def remove(self, parent: "Model", name: str) -> None:
"""Removes child from relation with given name in RelationshipManager"""
self._orm.remove_parent(self, parent, name)
def set_save_status(self, status: bool) -> None:
"""Sets value of the save status"""
object.__setattr__(self, "_orm_saved", status)
@classmethod
def update_forward_refs(cls, **localns: Any) -> None:
"""
Processes fields that are ForwardRef and need to be evaluated into actual
models.
Expands relationships, register relation in alias manager and substitutes
sqlalchemy columns with new ones with proper column type (null before).
Populates OrmarConfig table of the Model which is left empty before.
Sets self_reference flag on models that links to themselves.
Calls the pydantic method to evaluate pydantic fields.
:param localns: local namespace
:type localns: Any
:return: None
:rtype: None
"""
globalns = sys.modules[cls.__module__].__dict__.copy()
globalns.setdefault(cls.__name__, cls)
fields_to_check = cls.ormar_config.model_fields.copy()
for field in fields_to_check.values():
if field.has_unresolved_forward_refs():
field = cast(ForeignKeyField, field)
field.evaluate_forward_ref(globalns=globalns, localns=localns)
field.set_self_reference_flag()
if field.is_multi and not field.through:
field = cast(ormar.ManyToManyField, field)
field.create_default_through_model()
expand_reverse_relationship(model_field=field)
register_relation_in_alias_manager(field=field)
update_column_definition(model=cls, field=field)
populate_config_sqlalchemy_table_if_required(config=cls.ormar_config)
# super().update_forward_refs(**localns)
cls.model_rebuild(force=True)
cls.ormar_config.requires_ref_update = False
@staticmethod
def _get_not_excluded_fields(
fields: Union[List, Set], include: Optional[Dict], exclude: Optional[Dict]
) -> List:
"""
Returns related field names applying on them include and exclude set.
:param include: fields to include
:type include: Union[Set, Dict, None]
:param exclude: fields to exclude
:type exclude: Union[Set, Dict, None]
:return:
:rtype: List of fields with relations that is not excluded
"""
fields = [*fields] if not isinstance(fields, list) else fields
if include:
fields = [field for field in fields if field in include]
if exclude:
fields = [
field
for field in fields
if field not in exclude
or (
exclude.get(field) is not Ellipsis
and exclude.get(field) != {"__all__"}
)
]
return fields
@staticmethod
def _extract_nested_models_from_list(
relation_map: Dict,
models: MutableSequence,
include: Union[Set, Dict, None],
exclude: Union[Set, Dict, None],
exclude_primary_keys: bool,
exclude_through_models: bool,
) -> List:
"""
Converts list of models into list of dictionaries.
:param models: List of models
:type models: List
:param include: fields to include
:type include: Union[Set, Dict, None]
:param exclude: fields to exclude
:type exclude: Union[Set, Dict, None]
:return: list of models converted to dictionaries
:rtype: List[Dict]
"""
result = []
for model in models:
try:
model_dict = model.model_dump(
relation_map=relation_map,
include=include,
exclude=exclude,
exclude_primary_keys=exclude_primary_keys,
exclude_through_models=exclude_through_models,
)
if not exclude_through_models:
model.populate_through_models(
model=model,
model_dict=model_dict,
include=include,
exclude=exclude,
relation_map=relation_map,
)
result.append(model_dict)
except ReferenceError: # pragma no cover
continue
return result
@staticmethod
def populate_through_models(
model: "Model",
model_dict: Dict,
include: Union[Set, Dict],
exclude: Union[Set, Dict],
relation_map: Dict,
) -> None:
"""
Populates through models with values from dict representation.
:param model: model to populate through models
:type model: Model
:param model_dict: dict representation of the model
:type model_dict: Dict
:param include: fields to include
:type include: Dict
:param exclude: fields to exclude
:type exclude: Dict
:param relation_map: map of relations to follow to avoid circular refs
:type relation_map: Dict
:return: None
:rtype: None
"""
include_dict = (
translate_list_to_dict(include)
if (include and isinstance(include, Set))
else include
)
exclude_dict = (
translate_list_to_dict(exclude)
if (exclude and isinstance(exclude, Set))
else exclude
)
models_to_populate = model._get_not_excluded_fields(
fields=model.extract_through_names(),
include=cast(Optional[Dict], include_dict),
exclude=cast(Optional[Dict], exclude_dict),
)
through_fields_to_populate = [
model.ormar_config.model_fields[through_model]
for through_model in models_to_populate
if model.ormar_config.model_fields[through_model].related_name
not in relation_map
]
for through_field in through_fields_to_populate:
through_instance = getattr(model, through_field.name)
if through_instance:
model_dict[through_field.name] = through_instance.model_dump()
@classmethod
def _skip_ellipsis(
cls, items: Union[Set, Dict, None], key: str, default_return: Any = None
) -> Union[Set, Dict, None]:
"""
Helper to traverse the include/exclude dictionaries.
In model_dump() Ellipsis should be skipped as it indicates all fields required
and not the actual set/dict with fields names.
:param items: current include/exclude value
:type items: Union[Set, Dict, None]
:param key: key for nested relations to check
:type key: str
:return: nested value of the items
:rtype: Union[Set, Dict, None]
"""
result = cls.get_child(items, key)
return result if result is not Ellipsis else default_return
@staticmethod
def _convert_all(items: Union[Set, Dict, None]) -> Union[Set, Dict, None]:
"""
Helper to convert __all__ pydantic special index to ormar which does not
support index based exclusions.
:param items: current include/exclude value
:type items: Union[Set, Dict, None]
"""
if isinstance(items, dict) and "__all__" in items:
return items.get("__all__")
return items
def _extract_nested_models( # noqa: CCR001, CFQ002
self,
relation_map: Dict,
dict_instance: Dict,
include: Optional[Dict],
exclude: Optional[Dict],
exclude_primary_keys: bool,
exclude_through_models: bool,
exclude_list: bool,
) -> Dict:
"""
Traverse nested models and converts them into dictionaries.
Calls itself recursively if needed.
:param nested: flag if current instance is nested
:type nested: bool
:param dict_instance: current instance dict
:type dict_instance: Dict
:param include: fields to include
:type include: Optional[Dict]
:param exclude: fields to exclude
:type exclude: Optional[Dict]
:param exclude: whether to exclude lists
:type exclude: bool
:return: current model dict with child models converted to dictionaries
:rtype: Dict
"""
fields = self._get_not_excluded_fields(
fields=self.extract_related_names(), include=include, exclude=exclude
)
for field in fields:
if not relation_map or field not in relation_map:
continue
try:
nested_model = getattr(self, field)
if isinstance(nested_model, MutableSequence):
if exclude_list:
continue
dict_instance[field] = self._extract_nested_models_from_list(
relation_map=self._skip_ellipsis( # type: ignore
relation_map, field, default_return=dict()
),
models=nested_model,
include=self._convert_all(self._skip_ellipsis(include, field)),
exclude=self._convert_all(self._skip_ellipsis(exclude, field)),
exclude_primary_keys=exclude_primary_keys,
exclude_through_models=exclude_through_models,
)
elif nested_model is not None:
model_dict = nested_model.model_dump(
relation_map=self._skip_ellipsis(
relation_map, field, default_return=dict()
),
include=self._convert_all(self._skip_ellipsis(include, field)),
exclude=self._convert_all(self._skip_ellipsis(exclude, field)),
exclude_primary_keys=exclude_primary_keys,
exclude_through_models=exclude_through_models,
)
if not exclude_through_models:
nested_model.populate_through_models(
model=nested_model,
model_dict=model_dict,
include=self._convert_all(
self._skip_ellipsis(include, field)
),
exclude=self._convert_all(
self._skip_ellipsis(exclude, field)
),
relation_map=self._skip_ellipsis(
relation_map, field, default_return=dict()
),
)
dict_instance[field] = model_dict
else:
dict_instance[field] = None
except ReferenceError: # pragma: no cover
dict_instance[field] = None
return dict_instance
@typing_extensions.deprecated(
"The `dict` method is deprecated; use `model_dump` instead.",
category=OrmarDeprecatedSince020,
)
def dict( # type: ignore # noqa A003
self,
*,
include: Union[Set, Dict, None] = None,
exclude: Union[Set, Dict, None] = None,
by_alias: bool = False,
exclude_unset: bool = False,
exclude_defaults: bool = False,
exclude_none: bool = False,
exclude_primary_keys: bool = False,
exclude_through_models: bool = False,
exclude_list: bool = False,
relation_map: Optional[Dict] = None,
) -> "DictStrAny": # noqa: A003 # pragma: no cover
warnings.warn(
"The `dict` method is deprecated; use `model_dump` instead.",
DeprecationWarning,
)
return self.model_dump(
include=include,
exclude=exclude,
by_alias=by_alias,
exclude_unset=exclude_unset,
exclude_defaults=exclude_defaults,
exclude_none=exclude_none,
exclude_primary_keys=exclude_primary_keys,
exclude_through_models=exclude_through_models,
exclude_list=exclude_list,
relation_map=relation_map,
)
def model_dump( # type: ignore # noqa A003
self,
*,
mode: Union[Literal["json", "python"], str] = "python",
include: Union[Set, Dict, None] = None,
exclude: Union[Set, Dict, None] = None,
by_alias: bool = False,
exclude_unset: bool = False,
exclude_defaults: bool = False,
exclude_none: bool = False,
exclude_primary_keys: bool = False,
exclude_through_models: bool = False,
exclude_list: bool = False,
relation_map: Optional[Dict] = None,
round_trip: bool = False,
warnings: bool = True,
) -> "DictStrAny": # noqa: A003'
"""
Generate a dictionary representation of the model,
optionally specifying which fields to include or exclude.
Nested models are also parsed to dictionaries.
Additionally, fields decorated with @property_field are also added.
:param exclude_through_models: flag to exclude through models from dict
:type exclude_through_models: bool
:param exclude_primary_keys: flag to exclude primary keys from dict
:type exclude_primary_keys: bool
:param include: fields to include
:type include: Union[Set, Dict, None]
:param exclude: fields to exclude
:type exclude: Union[Set, Dict, None]
:param by_alias: flag to get values by alias - passed to pydantic
:type by_alias: bool
:param exclude_unset: flag to exclude not set values - passed to pydantic
:type exclude_unset: bool
:param exclude_defaults: flag to exclude default values - passed to pydantic
:type exclude_defaults: bool
:param exclude_none: flag to exclude None values - passed to pydantic
:type exclude_none: bool
:param exclude_list: flag to exclude lists of nested values models from dict
:type exclude_list: bool
:param relation_map: map of the relations to follow to avoid circular deps
:type relation_map: Dict
:param mode: The mode in which `to_python` should run.
If mode is 'json', the dictionary will only contain JSON serializable types.
If mode is 'python', the dictionary may contain any Python objects.
:type mode: str
:param round_trip: flag to enable serialization round-trip support
:type round_trip: bool
:param warnings: flag to log warnings for invalid fields
:type warnings: bool
:return:
:rtype:
"""
pydantic_exclude = self._update_excluded_with_related(exclude)
pydantic_exclude = self._update_excluded_with_pks_and_through(
exclude=pydantic_exclude,
exclude_primary_keys=exclude_primary_keys,
exclude_through_models=exclude_through_models,
)
dict_instance = super().model_dump(
mode=mode,
include=include,
exclude=pydantic_exclude,
by_alias=by_alias,
exclude_defaults=exclude_defaults,
exclude_unset=exclude_unset,
exclude_none=exclude_none,
round_trip=round_trip,
warnings=False,
)
dict_instance = {
k: self._convert_bytes_to_str(column_name=k, value=v)
for k, v in dict_instance.items()
}
include_dict = (
translate_list_to_dict(include) if isinstance(include, Set) else include
)
exclude_dict = (
translate_list_to_dict(exclude) if isinstance(exclude, Set) else exclude
)
relation_map = (
relation_map
if relation_map is not None
else translate_list_to_dict(self._iterate_related_models())
)
pk_only = getattr(self, "__pk_only__", False)
if relation_map and not pk_only:
dict_instance = self._extract_nested_models(
relation_map=relation_map,
dict_instance=dict_instance,
include=include_dict,
exclude=exclude_dict,
exclude_primary_keys=exclude_primary_keys,
exclude_through_models=exclude_through_models,
exclude_list=exclude_list,
)
return dict_instance
@typing_extensions.deprecated(
"The `json` method is deprecated; use `model_dump_json` instead.",
category=OrmarDeprecatedSince020,
)
def json( # type: ignore # noqa A003
self,
*,
include: Union[Set, Dict, None] = None,
exclude: Union[Set, Dict, None] = None,
by_alias: bool = False,
exclude_unset: bool = False,
exclude_defaults: bool = False,
exclude_none: bool = False,
exclude_primary_keys: bool = False,
exclude_through_models: bool = False,
**dumps_kwargs: Any,
) -> str: # pragma: no cover
warnings.warn(
"The `json` method is deprecated; use `model_dump_json` instead.",
DeprecationWarning,
)
return self.model_dump_json(
include=include,
exclude=exclude,
by_alias=by_alias,
exclude_unset=exclude_unset,
exclude_defaults=exclude_defaults,
exclude_none=exclude_none,
exclude_primary_keys=exclude_primary_keys,
exclude_through_models=exclude_through_models,
**dumps_kwargs,
)
def model_dump_json( # type: ignore # noqa A003
self,
*,
include: Union[Set, Dict, None] = None,
exclude: Union[Set, Dict, None] = None,
by_alias: bool = False,
exclude_unset: bool = False,
exclude_defaults: bool = False,
exclude_none: bool = False,
exclude_primary_keys: bool = False,
exclude_through_models: bool = False,
**dumps_kwargs: Any,
) -> str:
"""
Generate a JSON representation of the model, `include` and `exclude`
arguments as per `dict()`.
`encoder` is an optional function to supply as `default` to json.dumps(),
other arguments as per `json.dumps()`.
"""
data = self.model_dump(
include=include,
exclude=exclude,
by_alias=by_alias,
exclude_unset=exclude_unset,
exclude_defaults=exclude_defaults,
exclude_none=exclude_none,
exclude_primary_keys=exclude_primary_keys,
exclude_through_models=exclude_through_models,
)
return self.__pydantic_serializer__.to_json(data, warnings=False).decode()
@classmethod
@typing_extensions.deprecated(
"The `construct` method is deprecated; use `model_construct` instead.",
category=OrmarDeprecatedSince020,
)
def construct(
cls: Type["T"], _fields_set: Union[Set[str], None] = None, **values: Any
) -> "T": # pragma: no cover
warnings.warn(
"The `construct` method is deprecated; use `model_construct` instead.",
DeprecationWarning,
)
return cls.model_construct(_fields_set=_fields_set, **values)
@classmethod
def model_construct(
cls: Type["T"], _fields_set: Optional["SetStr"] = None, **values: Any
) -> "T":
own_values = {
k: v for k, v in values.items() if k not in cls.extract_related_names()
}
model = cls.__new__(cls)
fields_values: Dict[str, Any] = {}
for name, field in cls.model_fields.items():
if name in own_values:
fields_values[name] = own_values[name]
elif not field.is_required():
fields_values[name] = field.get_default()
fields_values.update(own_values)
if _fields_set is None:
_fields_set = set(values.keys())
extra_allowed = cls.model_config.get("extra") == "allow"
if not extra_allowed:
fields_values.update(values)
object.__setattr__(model, "__dict__", fields_values)
model._initialize_internal_attributes()
cls._construct_relations(model=model, values=values)
object.__setattr__(model, "__pydantic_fields_set__", _fields_set)
return cls._pydantic_model_construct_finalizer(
model=model, extra_allowed=extra_allowed, values=values
)
@classmethod
def _pydantic_model_construct_finalizer(
cls: Type["T"], model: "T", extra_allowed: bool, **values: Any
) -> "T":
"""
Recreate pydantic model_construct logic here as we do not call super method.
"""
_extra: Union[Dict[str, Any], None] = None
if extra_allowed: # pragma: no cover
_extra = {}
for k, v in values.items():
_extra[k] = v
if not cls.__pydantic_root_model__:
object.__setattr__(model, "__pydantic_extra__", _extra)
if cls.__pydantic_post_init__: # pragma: no cover
model.model_post_init(None)
elif not cls.__pydantic_root_model__:
# Note: if there are any private attributes,
# cls.__pydantic_post_init__ would exist
# Since it doesn't, that means that `__pydantic_private__`
# should be set to None
object.__setattr__(model, "__pydantic_private__", None)
return model
@classmethod
def _construct_relations(cls: Type["T"], model: "T", values: Dict) -> None:
present_relations = [
relation for relation in cls.extract_related_names() if relation in values
]
for relation in present_relations:
value_to_set = values[relation]
if not isinstance(value_to_set, list):
value_to_set = [value_to_set]
relation_field = cls.ormar_config.model_fields[relation]
relation_value = [
relation_field.expand_relationship(x, model, to_register=False)
for x in value_to_set
if x is not None
]
for child in relation_value:
model._orm.add(
parent=cast("Model", child),
child=cast("Model", model),
field=cast("ForeignKeyField", relation_field),
)
def update_from_dict(self, value_dict: Dict) -> "NewBaseModel":
"""
Updates self with values of fields passed in the dictionary.
:param value_dict: dictionary of fields names and values
:type value_dict: Dict
:return: self
:rtype: NewBaseModel
"""
for key, value in value_dict.items():
setattr(self, key, value)
return self
def _convert_to_bytes(self, column_name: str, value: Any) -> Union[str, Dict]:
"""
Converts value to bytes from string
:param column_name: name of the field
:type column_name: str
:param value: value fo the field
:type value: Any
:return: converted value if needed, else original value
:rtype: Any
"""
if column_name not in self._bytes_fields:
return value
field = self.ormar_config.model_fields[column_name]
if value is not None:
value = decode_bytes(
value=value, represent_as_string=field.represent_as_base64_str
)
return value
def _convert_bytes_to_str(self, column_name: str, value: Any) -> Union[str, Dict]:
"""
Converts value to str from bytes for represent_as_base64_str columns.
:param column_name: name of the field
:type column_name: str
:param value: value fo the field
:type value: Any
:return: converted value if needed, else original value
:rtype: Any
"""
if column_name not in self._bytes_fields:
return value
field = self.ormar_config.model_fields[column_name]
if (
value is not None
and not isinstance(value, str)
and field.represent_as_base64_str
):
return base64.b64encode(value).decode()
return value
def _convert_json(self, column_name: str, value: Any) -> Union[str, Dict, None]:
"""
Converts value to/from json if needed (for Json columns).
:param column_name: name of the field
:type column_name: str
:param value: value fo the field
:type value: Any
:return: converted value if needed, else original value
:rtype: Any
"""
if column_name not in self._json_fields:
return value
return encode_json(value)
def _extract_own_model_fields(self) -> Dict:
"""
Returns a dictionary with field names and values for fields that are not
relations fields (ForeignKey, ManyToMany etc.)
:return: dictionary of fields names and values.
:rtype: Dict
"""
related_names = self.extract_related_names()
self_fields = {k: v for k, v in self.__dict__.items() if k not in related_names}
return self_fields
def _extract_model_db_fields(self) -> Dict:
"""
Returns a dictionary with field names and values for fields that are stored in
current model's table.
That includes own non-relational fields ang foreign key fields.
:return: dictionary of fields names and values.
:rtype: Dict
"""
self_fields = self._extract_own_model_fields()
self_fields = {
k: v
for k, v in self_fields.items()
if self.get_column_alias(k) in self.ormar_config.table.columns
}
for field in self._extract_db_related_names():
relation_field = self.ormar_config.model_fields[field]
target_pk_name = relation_field.to.ormar_config.pkname
target_field = getattr(self, field)
self_fields[field] = getattr(target_field, target_pk_name, None)
if not relation_field.nullable and not self_fields[field]:
raise ModelPersistenceError(
f"You cannot save {relation_field.to.get_name()} "
f"model without pk set!"
)
return self_fields