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storage.py
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storage.py
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import copy
from datetime import datetime
import json
import logging
import os
import sys
from typing import Any
from typing import Dict
from typing import List
from typing import Optional
from typing import Set
import uuid
import weakref
import alembic.command
import alembic.config
import alembic.migration
import alembic.script
from sqlalchemy.engine import create_engine
from sqlalchemy.engine import Engine # NOQA
from sqlalchemy.exc import IntegrityError
from sqlalchemy.exc import OperationalError
from sqlalchemy.exc import SQLAlchemyError
from sqlalchemy import orm
from sqlalchemy.sql import functions
import optuna
from optuna import distributions
from optuna.storages._base import BaseStorage
from optuna.storages._base import DEFAULT_STUDY_NAME_PREFIX
from optuna.storages._rdb import models
from optuna.study import StudyDirection
from optuna.study import StudySummary
from optuna.trial import FrozenTrial
from optuna.trial import TrialState
from optuna import version
_logger = optuna.logging.get_logger(__name__)
class RDBStorage(BaseStorage):
"""Storage class for RDB backend.
Note that library users can instantiate this class, but the attributes
provided by this class are not supposed to be directly accessed by them.
Example:
Create an :class:`~optuna.storages.RDBStorage` instance with customized
``pool_size`` and ``timeout`` settings.
.. testcode::
import optuna
def objective(trial):
x = trial.suggest_uniform('x', -100, 100)
return x ** 2
storage = optuna.storages.RDBStorage(
url='sqlite:///:memory:',
engine_kwargs={
'pool_size': 20,
'connect_args': {
'timeout': 10
}
}
)
study = optuna.create_study(storage=storage)
study.optimize(objective, n_trials=10)
Args:
url: URL of the storage.
engine_kwargs:
A dictionary of keyword arguments that is passed to
`sqlalchemy.engine.create_engine`_ function.
skip_compatibility_check:
Flag to skip schema compatibility check if set to True.
.. _sqlalchemy.engine.create_engine:
https://docs.sqlalchemy.org/en/latest/core/engines.html#sqlalchemy.create_engine
.. note::
If you use MySQL, `pool_pre_ping`_ will be set to :obj:`True` by default to prevent
connection timeout. You can turn it off with ``engine_kwargs['pool_pre_ping']=False``, but
it is recommended to keep the setting if execution time of your objective function is
longer than the `wait_timeout` of your MySQL configuration.
.. _pool_pre_ping:
https://docs.sqlalchemy.org/en/13/core/engines.html#sqlalchemy.create_engine.params.
pool_pre_ping
"""
def __init__(self, url, engine_kwargs=None, skip_compatibility_check=False):
# type: (str, Optional[Dict[str, Any]], bool) -> None
self.engine_kwargs = engine_kwargs or {}
self.url = self._fill_storage_url_template(url)
self.skip_compatibility_check = skip_compatibility_check
self._set_default_engine_kwargs_for_mysql(url, self.engine_kwargs)
try:
self.engine = create_engine(self.url, **self.engine_kwargs)
except ImportError as e:
raise ImportError(
"Failed to import DB access module for the specified storage URL. "
"Please install appropriate one. (The actual import error is: " + str(e) + ".)"
)
self.scoped_session = orm.scoped_session(orm.sessionmaker(bind=self.engine))
models.BaseModel.metadata.create_all(self.engine)
self._version_manager = _VersionManager(self.url, self.engine, self.scoped_session)
if not skip_compatibility_check:
self._version_manager.check_table_schema_compatibility()
weakref.finalize(self, self._finalize)
def __getstate__(self):
# type: () -> Dict[Any, Any]
state = self.__dict__.copy()
del state["scoped_session"]
del state["engine"]
del state["_version_manager"]
return state
def __setstate__(self, state):
# type: (Dict[Any, Any]) -> None
self.__dict__.update(state)
try:
self.engine = create_engine(self.url, **self.engine_kwargs)
except ImportError as e:
raise ImportError(
"Failed to import DB access module for the specified storage URL. "
"Please install appropriate one. (The actual import error is: " + str(e) + ".)"
)
self.scoped_session = orm.scoped_session(orm.sessionmaker(bind=self.engine))
models.BaseModel.metadata.create_all(self.engine)
self._version_manager = _VersionManager(self.url, self.engine, self.scoped_session)
if not self.skip_compatibility_check:
self._version_manager.check_table_schema_compatibility()
def create_new_study(self, study_name=None):
# type: (Optional[str]) -> int
session = self.scoped_session()
if study_name is None:
study_name = self._create_unique_study_name(session)
study = models.StudyModel(study_name=study_name, direction=StudyDirection.NOT_SET)
session.add(study)
if not self._commit_with_integrity_check(session):
raise optuna.exceptions.DuplicatedStudyError(
"Another study with name '{}' already exists. "
"Please specify a different name, or reuse the existing one "
"by setting `load_if_exists` (for Python API) or "
"`--skip-if-exists` flag (for CLI).".format(study_name)
)
_logger.info("A new study created with name: {}".format(study.study_name))
return study.study_id
def delete_study(self, study_id):
# type: (int) -> None
session = self.scoped_session()
study = models.StudyModel.find_or_raise_by_id(study_id, session)
session.delete(study)
self._commit_with_integrity_check(session)
@staticmethod
def _create_unique_study_name(session):
# type: (orm.Session) -> str
while True:
study_uuid = str(uuid.uuid4())
study_name = DEFAULT_STUDY_NAME_PREFIX + study_uuid
study = models.StudyModel.find_by_name(study_name, session)
if study is None:
break
return study_name
# TODO(sano): Prevent simultaneously setting different direction in distributed environments.
def set_study_direction(self, study_id, direction):
# type: (int, StudyDirection) -> None
session = self.scoped_session()
study = models.StudyModel.find_or_raise_by_id(study_id, session)
if study.direction != StudyDirection.NOT_SET and study.direction != direction:
raise ValueError(
"Cannot overwrite study direction from {} to {}.".format(
study.direction, direction
)
)
study.direction = direction
self._commit(session)
def set_study_user_attr(self, study_id, key, value):
# type: (int, str, Any) -> None
session = self.scoped_session()
study = models.StudyModel.find_or_raise_by_id(study_id, session)
attribute = models.StudyUserAttributeModel.find_by_study_and_key(study, key, session)
if attribute is None:
attribute = models.StudyUserAttributeModel(
study_id=study_id, key=key, value_json=json.dumps(value)
)
session.add(attribute)
else:
attribute.value_json = json.dumps(value)
self._commit_with_integrity_check(session)
def set_study_system_attr(self, study_id, key, value):
# type: (int, str, Any) -> None
session = self.scoped_session()
study = models.StudyModel.find_or_raise_by_id(study_id, session)
attribute = models.StudySystemAttributeModel.find_by_study_and_key(study, key, session)
if attribute is None:
attribute = models.StudySystemAttributeModel(
study_id=study_id, key=key, value_json=json.dumps(value)
)
session.add(attribute)
else:
attribute.value_json = json.dumps(value)
self._commit_with_integrity_check(session)
def get_study_id_from_name(self, study_name):
# type: (str) -> int
session = self.scoped_session()
study = models.StudyModel.find_or_raise_by_name(study_name, session)
# Terminate transaction explicitly to avoid connection timeout during transaction.
self._commit(session)
return study.study_id
def get_study_id_from_trial_id(self, trial_id):
# type: (int) -> int
session = self.scoped_session()
trial = models.TrialModel.find_or_raise_by_id(trial_id, session)
# Terminate transaction explicitly to avoid connection timeout during transaction.
self._commit(session)
return trial.study_id
def get_study_name_from_id(self, study_id):
# type: (int) -> str
session = self.scoped_session()
study = models.StudyModel.find_or_raise_by_id(study_id, session)
# Terminate transaction explicitly to avoid connection timeout during transaction.
self._commit(session)
return study.study_name
def get_study_direction(self, study_id):
# type: (int) -> StudyDirection
session = self.scoped_session()
study = models.StudyModel.find_or_raise_by_id(study_id, session)
# Terminate transaction explicitly to avoid connection timeout during transaction.
self._commit(session)
return study.direction
def get_study_user_attrs(self, study_id):
# type: (int) -> Dict[str, Any]
session = self.scoped_session()
# Ensure that that study exists.
models.StudyModel.find_or_raise_by_id(study_id, session)
attributes = models.StudyUserAttributeModel.where_study_id(study_id, session)
user_attrs = {attr.key: json.loads(attr.value_json) for attr in attributes}
# Terminate transaction explicitly to avoid connection timeout during transaction.
self._commit(session)
return user_attrs
def get_study_system_attrs(self, study_id):
# type: (int) -> Dict[str, Any]
session = self.scoped_session()
# Ensure that that study exists.
models.StudyModel.find_or_raise_by_id(study_id, session)
attributes = models.StudySystemAttributeModel.where_study_id(study_id, session)
system_attrs = {attr.key: json.loads(attr.value_json) for attr in attributes}
# Terminate transaction explicitly to avoid connection timeout during transaction.
self._commit(session)
return system_attrs
def get_trial_user_attrs(self, trial_id):
# type: (int) -> Dict[str, Any]
session = self.scoped_session()
# Ensure trial exists.
models.TrialModel.find_or_raise_by_id(trial_id, session)
attributes = models.TrialUserAttributeModel.where_trial_id(trial_id, session)
user_attrs = {attr.key: json.loads(attr.value_json) for attr in attributes}
# Terminate transaction explicitly to avoid connection timeout during transaction.
self._commit(session)
return user_attrs
def get_trial_system_attrs(self, trial_id):
# type: (int) -> Dict[str, Any]
session = self.scoped_session()
# Ensure trial exists.
models.TrialModel.find_or_raise_by_id(trial_id, session)
attributes = models.TrialSystemAttributeModel.where_trial_id(trial_id, session)
system_attrs = {attr.key: json.loads(attr.value_json) for attr in attributes}
# Terminate transaction explicitly to avoid connection timeout during transaction.
self._commit(session)
return system_attrs
def get_all_study_summaries(self) -> List[StudySummary]:
session = self.scoped_session()
summarized_trial = (
session.query(
models.TrialModel.study_id,
functions.min(models.TrialModel.datetime_start).label("datetime_start"),
functions.count(models.TrialModel.trial_id).label("n_trial"),
)
.group_by(models.TrialModel.study_id)
.with_labels()
.subquery()
)
study_summary_stmt = session.query(
models.StudyModel.study_id,
models.StudyModel.study_name,
models.StudyModel.direction,
summarized_trial.c.datetime_start,
functions.coalesce(summarized_trial.c.n_trial, 0).label("n_trial"),
).select_from(orm.outerjoin(models.StudyModel, summarized_trial))
study_summary = study_summary_stmt.all()
study_summaries = []
for study in study_summary:
best_trial = None # type: Optional[models.TrialModel]
try:
if study.direction == StudyDirection.MAXIMIZE:
best_trial = models.TrialModel.find_max_value_trial(study.study_id, session)
else:
best_trial = models.TrialModel.find_min_value_trial(study.study_id, session)
except ValueError:
best_trial_frozen = None # type: Optional[FrozenTrial]
if best_trial:
params = (
session.query(
models.TrialParamModel.param_name,
models.TrialParamModel.param_value,
models.TrialParamModel.distribution_json,
)
.filter(models.TrialParamModel.trial_id == best_trial.trial_id)
.all()
)
param_dict = {}
param_distributions = {}
for param in params:
distribution = distributions.json_to_distribution(param.distribution_json)
param_dict[param.param_name] = distribution.to_external_repr(param.param_value)
param_distributions[param.param_name] = distribution
user_attrs = session.query(models.TrialUserAttributeModel).filter(
models.TrialUserAttributeModel.trial_id == best_trial.trial_id
)
system_attrs = session.query(models.TrialSystemAttributeModel).filter(
models.TrialSystemAttributeModel.trial_id == best_trial.trial_id
)
intermediate = session.query(models.TrialValueModel).filter(
models.TrialValueModel.trial_id == best_trial.trial_id
)
best_trial_frozen = FrozenTrial(
best_trial.number,
TrialState.COMPLETE,
best_trial.value,
best_trial.datetime_start,
best_trial.datetime_complete,
param_dict,
param_distributions,
{i.key: json.loads(i.value_json) for i in user_attrs},
{i.key: json.loads(i.value_json) for i in system_attrs},
{value.step: value.value for value in intermediate},
best_trial.trial_id,
)
user_attrs = session.query(models.StudyUserAttributeModel).filter(
models.StudyUserAttributeModel.study_id == study.study_id
)
system_attrs = session.query(models.StudySystemAttributeModel).filter(
models.StudySystemAttributeModel.study_id == study.study_id
)
study_summaries.append(
StudySummary(
study_name=study.study_name,
direction=study.direction,
best_trial=best_trial_frozen,
user_attrs={i.key: json.loads(i.value_json) for i in user_attrs},
system_attrs={i.key: json.loads(i.value_json) for i in system_attrs},
n_trials=study.n_trial,
datetime_start=study.datetime_start,
study_id=study.study_id,
)
)
# Terminate transaction explicitly to avoid connection timeout during transaction.
self._commit(session)
return study_summaries
def create_new_trial(self, study_id, template_trial=None):
# type: (int, Optional[FrozenTrial]) -> int
return self._create_new_trial(study_id, template_trial)._trial_id
def _create_new_trial(
self, study_id: int, template_trial: Optional[FrozenTrial] = None
) -> FrozenTrial:
"""Create a new trial and returns its trial_id and a :class:`~optuna.trial.FrozenTrial`.
Args:
study_id:
Study id.
template_trial:
A :class:`~optuna.trial.FrozenTrial` with default values for trial attributes.
Returns:
A :class:`~optuna.trial.FrozenTrial` instance.
"""
# Retry a couple of times. Deadlocks may occur in distributed environments.
n_retries = 0
while True:
session = self.scoped_session()
try:
# Ensure that that study exists.
#
# Locking within a study is necessary since the creation of a trial is not an
# atomic operation. More precisely, the trial number computed in
# `_get_prepared_new_trial` is prone to race conditions without this lock.
models.StudyModel.find_or_raise_by_id(study_id, session, for_update=True)
trial = self._get_prepared_new_trial(study_id, template_trial, session)
self._commit(session)
break # Successfully created trial.
except OperationalError:
session.rollback()
if n_retries > 2:
raise
n_retries += 1
if template_trial:
frozen = copy.deepcopy(template_trial)
frozen.number = trial.number
frozen.datetime_start = trial.datetime_start
frozen._trial_id = trial.trial_id
else:
frozen = FrozenTrial(
number=trial.number,
state=trial.state,
value=None,
datetime_start=trial.datetime_start,
datetime_complete=None,
params={},
distributions={},
user_attrs={},
system_attrs={},
intermediate_values={},
trial_id=trial.trial_id,
)
return frozen
def _get_prepared_new_trial(
self, study_id: int, template_trial: Optional[FrozenTrial], session: orm.Session
) -> models.TrialModel:
if template_trial is None:
trial = models.TrialModel(study_id=study_id, number=None, state=TrialState.RUNNING)
else:
# Because only `RUNNING` trials can be updated,
# we temporarily set the state of the new trial to `RUNNING`.
# After all fields of the trial have been updated,
# the state is set to `template_trial.state`.
temp_state = TrialState.RUNNING
trial = models.TrialModel(
study_id=study_id,
number=None,
state=temp_state,
value=template_trial.value,
datetime_start=template_trial.datetime_start,
datetime_complete=template_trial.datetime_complete,
)
session.add(trial)
# Flush the session cache to reflect the above addition operation to
# the current RDB transaction.
#
# Without flushing, the following operations (e.g, `_set_trial_param_without_commit`)
# will fail because the target trial doesn't exist in the storage yet.
session.flush()
if template_trial is not None:
for param_name, param_value in template_trial.params.items():
distribution = template_trial.distributions[param_name]
param_value_in_internal_repr = distribution.to_internal_repr(param_value)
self._set_trial_param_without_commit(
session, trial.trial_id, param_name, param_value_in_internal_repr, distribution
)
for key, value in template_trial.user_attrs.items():
self._set_trial_user_attr_without_commit(session, trial.trial_id, key, value)
for key, value in template_trial.system_attrs.items():
self._set_trial_system_attr_without_commit(session, trial.trial_id, key, value)
for step, intermediate_value in template_trial.intermediate_values.items():
self._set_trial_intermediate_value_without_commit(
session, trial.trial_id, step, intermediate_value
)
trial.state = template_trial.state
trial.number = trial.count_past_trials(session)
session.add(trial)
return trial
def _update_trial(
self,
trial_id: int,
state: Optional[TrialState] = None,
value: Optional[float] = None,
intermediate_values: Optional[Dict[int, float]] = None,
params: Optional[Dict[str, Any]] = None,
distributions_: Optional[Dict[str, distributions.BaseDistribution]] = None,
user_attrs: Optional[Dict[str, Any]] = None,
system_attrs: Optional[Dict[str, Any]] = None,
datetime_complete: Optional[datetime] = None,
) -> bool:
"""Sync latest trial updates to a database.
Args:
trial_id:
Trial id of the trial to update.
state:
New state. None when there are no changes.
value:
New value. None when there are no changes.
intermediate_values:
New intermediate values. None when there are no updates.
params:
New parameter dictionary. None when there are no updates.
distributions_:
New parameter distributions. None when there are no updates.
user_attrs:
New user_attr. None when there are no updates.
system_attrs:
New system_attr. None when there are no updates.
datetime_complete:
Completion time of the trial. Set if and only if this method
change the state of trial into one of the finished states.
Returns:
True when success.
"""
session = self.scoped_session()
trial_model = (
session.query(models.TrialModel)
.filter(models.TrialModel.trial_id == trial_id)
.with_for_update()
.one_or_none()
)
if trial_model is None:
session.rollback()
raise KeyError(models.NOT_FOUND_MSG)
if trial_model.state.is_finished():
session.rollback()
raise RuntimeError("Cannot change attributes of finished trial.")
if (
state
and trial_model.state != state
and state == TrialState.RUNNING
and trial_model.state != TrialState.WAITING
):
session.rollback()
return False
if state:
trial_model.state = state
if datetime_complete:
trial_model.datetime_complete = datetime_complete
if value is not None:
trial_model.value = value
if user_attrs:
trial_user_attrs = (
session.query(models.TrialUserAttributeModel)
.filter(models.TrialUserAttributeModel.trial_id == trial_id)
.with_for_update()
.all()
)
trial_user_attrs_dict = {attr.key: attr for attr in trial_user_attrs}
for k, v in user_attrs.items():
if k in trial_user_attrs_dict:
trial_user_attrs_dict[k].value_json = json.dumps(v)
session.add(trial_user_attrs_dict[k])
trial_model.user_attributes.extend(
models.TrialUserAttributeModel(key=k, value_json=json.dumps(v))
for k, v in user_attrs.items()
if k not in trial_user_attrs_dict
)
if system_attrs:
trial_system_attrs = (
session.query(models.TrialSystemAttributeModel)
.filter(models.TrialSystemAttributeModel.trial_id == trial_id)
.with_for_update()
.all()
)
trial_system_attrs_dict = {attr.key: attr for attr in trial_system_attrs}
for k, v in system_attrs.items():
if k in trial_system_attrs_dict:
trial_system_attrs_dict[k].value_json = json.dumps(v)
session.add(trial_system_attrs_dict[k])
trial_model.system_attributes.extend(
models.TrialSystemAttributeModel(key=k, value_json=json.dumps(v))
for k, v in system_attrs.items()
if k not in trial_system_attrs_dict
)
if intermediate_values:
value_models = (
session.query(models.TrialValueModel)
.filter(models.TrialValueModel.trial_id == trial_id)
.with_for_update()
.all()
)
value_dict = {value_model.step: value_model for value_model in value_models}
for s, v in value_dict.items():
if s in value_dict:
value_dict[s] = v
session.add(value_dict[s])
trial_model.values.extend(
models.TrialValueModel(step=s, value=v)
for s, v in intermediate_values.items()
if s not in value_dict
)
if params and distributions_:
trial_param = (
session.query(models.TrialParamModel)
.filter(models.TrialParamModel.trial_id == trial_id)
.all()
)
param_keys = set(param.param_name for param in trial_param)
trial_model.params.extend(
models.TrialParamModel(
param_name=param_name,
param_value=param_value,
distribution_json=distributions.distribution_to_json(
distributions_[param_name]
),
)
for param_name, param_value in params.items()
if param_name not in param_keys
)
session.add(trial_model)
self._commit(session)
return True
def set_trial_state(self, trial_id, state):
# type: (int, TrialState) -> bool
session = self.scoped_session()
trial = models.TrialModel.find_by_id(trial_id, session, for_update=True)
if trial is None:
session.rollback()
raise KeyError(models.NOT_FOUND_MSG)
self.check_trial_is_updatable(trial_id, trial.state)
if state == TrialState.RUNNING and trial.state != TrialState.WAITING:
session.rollback()
return False
trial.state = state
if state.is_finished():
trial.datetime_complete = datetime.now()
return self._commit_with_integrity_check(session)
def set_trial_param(self, trial_id, param_name, param_value_internal, distribution):
# type: (int, str, float, distributions.BaseDistribution) -> None
session = self.scoped_session()
self._set_trial_param_without_commit(
session, trial_id, param_name, param_value_internal, distribution
)
self._commit_with_integrity_check(session)
def _set_trial_param_without_commit(
self, session, trial_id, param_name, param_value_internal, distribution
):
# type: (orm.Session, int, str, float, distributions.BaseDistribution) -> None
trial = models.TrialModel.find_or_raise_by_id(trial_id, session)
self.check_trial_is_updatable(trial_id, trial.state)
trial_param = models.TrialParamModel.find_by_trial_and_param_name(
trial, param_name, session
)
if trial_param is not None:
# Raise error in case distribution is incompatible.
distributions.check_distribution_compatibility(
distributions.json_to_distribution(trial_param.distribution_json), distribution
)
trial_param.param_value = param_value_internal
trial_param.distribution_json = distributions.distribution_to_json(distribution)
else:
trial_param = models.TrialParamModel(
trial_id=trial_id,
param_name=param_name,
param_value=param_value_internal,
distribution_json=distributions.distribution_to_json(distribution),
)
trial_param.check_and_add(session)
def _check_and_set_param_distribution(
self,
trial_id: int,
param_name: str,
param_value_internal: float,
distribution: distributions.BaseDistribution,
) -> None:
session = self.scoped_session()
# Acquire a lock of this trial.
trial = models.TrialModel.find_by_id(trial_id, session, for_update=True)
if trial is None:
raise KeyError(models.NOT_FOUND_MSG)
previous_record = (
session.query(models.TrialParamModel)
.join(models.TrialModel)
.filter(models.TrialModel.study_id == trial.study_id)
.filter(models.TrialParamModel.param_name == param_name)
.first()
)
if previous_record is not None:
distributions.check_distribution_compatibility(
distributions.json_to_distribution(previous_record.distribution_json),
distribution,
)
session.add(
models.TrialParamModel(
trial_id=trial_id,
param_name=param_name,
param_value=param_value_internal,
distribution_json=distributions.distribution_to_json(distribution),
)
)
# Release lock.
session.commit()
def get_trial_param(self, trial_id, param_name):
# type: (int, str) -> float
session = self.scoped_session()
trial = models.TrialModel.find_or_raise_by_id(trial_id, session)
trial_param = models.TrialParamModel.find_or_raise_by_trial_and_param_name(
trial, param_name, session
)
# Terminate transaction explicitly to avoid connection timeout during transaction.
self._commit(session)
return trial_param.param_value
def set_trial_value(self, trial_id, value):
# type: (int, float) -> None
session = self.scoped_session()
trial = models.TrialModel.find_or_raise_by_id(trial_id, session)
self.check_trial_is_updatable(trial_id, trial.state)
trial.value = value
self._commit(session)
def set_trial_intermediate_value(self, trial_id, step, intermediate_value):
# type: (int, int, float) -> None
session = self.scoped_session()
self._set_trial_intermediate_value_without_commit(
session, trial_id, step, intermediate_value
)
self._commit_with_integrity_check(session)
def _set_trial_intermediate_value_without_commit(
self, session, trial_id, step, intermediate_value
):
# type: (orm.Session, int, int, float) -> None
trial = models.TrialModel.find_or_raise_by_id(trial_id, session)
self.check_trial_is_updatable(trial_id, trial.state)
trial_value = models.TrialValueModel.find_by_trial_and_step(trial, step, session)
if trial_value is None:
trial_value = models.TrialValueModel(
trial_id=trial_id, step=step, value=intermediate_value
)
session.add(trial_value)
else:
trial_value.value = intermediate_value
def set_trial_user_attr(self, trial_id, key, value):
# type: (int, str, Any) -> None
session = self.scoped_session()
self._set_trial_user_attr_without_commit(session, trial_id, key, value)
self._commit_with_integrity_check(session)
def _set_trial_user_attr_without_commit(self, session, trial_id, key, value):
# type: (orm.Session, int, str, Any) -> None
trial = models.TrialModel.find_or_raise_by_id(trial_id, session)
self.check_trial_is_updatable(trial_id, trial.state)
attribute = models.TrialUserAttributeModel.find_by_trial_and_key(trial, key, session)
if attribute is None:
attribute = models.TrialUserAttributeModel(
trial_id=trial_id, key=key, value_json=json.dumps(value)
)
session.add(attribute)
else:
attribute.value_json = json.dumps(value)
def set_trial_system_attr(self, trial_id, key, value):
# type: (int, str, Any) -> None
session = self.scoped_session()
self._set_trial_system_attr_without_commit(session, trial_id, key, value)
self._commit_with_integrity_check(session)
def _set_trial_system_attr_without_commit(self, session, trial_id, key, value):
# type: (orm.Session, int, str, Any) -> None
trial = models.TrialModel.find_or_raise_by_id(trial_id, session)
self.check_trial_is_updatable(trial_id, trial.state)
attribute = models.TrialSystemAttributeModel.find_by_trial_and_key(trial, key, session)
if attribute is None:
attribute = models.TrialSystemAttributeModel(
trial_id=trial_id, key=key, value_json=json.dumps(value)
)
session.add(attribute)
else:
attribute.value_json = json.dumps(value)
def get_trial_number_from_id(self, trial_id):
# type: (int) -> int
trial_number = self.get_trial(trial_id).number
return trial_number
def get_trial(self, trial_id):
# type: (int) -> FrozenTrial
session = self.scoped_session()
trial_model = (
session.query(models.TrialModel)
.filter(models.TrialModel.trial_id == trial_id)
.one_or_none()
)
if not trial_model:
raise KeyError("No trial with trial-id {} found.".format(trial_id))
frozen_trial = self._build_frozen_trial_from_trial_model(trial_model)
self._commit(session)
return frozen_trial
def get_all_trials(self, study_id, deepcopy=True):
# type: (int, bool) -> List[FrozenTrial]
trials = self._get_trials(study_id, set())
return copy.deepcopy(trials) if deepcopy else trials
def _get_trials(self, study_id: int, excluded_trial_ids: Set[int]) -> List[FrozenTrial]:
session = self.scoped_session()
# Ensure that the study exists.
models.StudyModel.find_or_raise_by_id(study_id, session)
trial_ids = (
session.query(models.TrialModel.trial_id)
.filter(models.TrialModel.study_id == study_id,)
.all()
)
trial_ids = set(
trial_id_tuple[0]
for trial_id_tuple in trial_ids
if trial_id_tuple[0] not in excluded_trial_ids
)
try:
trial_models = (
session.query(models.TrialModel)
.filter(
models.TrialModel.trial_id.in_(trial_ids),
models.TrialModel.study_id == study_id,
)
.all()
)
except OperationalError as e:
# Likely exceeding the number of maximum allowed variables using IN. This number differ
# between database dialects. For SQLite for instance, see
# https://www.sqlite.org/limits.html and the section describing
# SQLITE_MAX_VARIABLE_NUMBER.
_logger.warning(
"Caught an error from sqlalchemy: {}. Falling back to a slower alternative. "
"".format(str(e))
)
trial_models = (
session.query(models.TrialModel)
.filter(models.TrialModel.study_id == study_id)
.all()
)
trial_models = [t for t in trial_models if t.trial_id in trial_ids]
trials = [self._build_frozen_trial_from_trial_model(trial) for trial in trial_models]
self._commit(session)