models

Note that this module is imported from fractal_server/migrations/env.py, thus we should always export all relevant database models from here or they will not be picked up by alembic.

`ApplyWorkflow` ¶

Bases: _ApplyWorkflowBaseV1, SQLModel

Represent a workflow run

This table is responsible for storing the state of a workflow execution in the database.

Attributes:

Name	Type	Description
`id`	`Optional[int]`	Primary key.
`project_id`	`Optional[int]`	ID of the project the workflow belongs to, or `None` if the project was deleted.
`input_dataset_id`	`Optional[int]`	ID of the input dataset, or `None` if the dataset was deleted.
`output_dataset_id`	`Optional[int]`	ID of the output dataset, or `None` if the dataset was deleted.
`workflow_id`	`Optional[int]`	ID of the workflow being applied, or `None` if the workflow was deleted.
`status`	`str`	Job status
`workflow_dump`	`dict[str, Any]`	Copy of the submitted workflow at submission.
`input_dataset_dump`	`dict[str, Any]`	Copy of the input_dataset at submission.
`output_dataset_dump`	`dict[str, Any]`	Copy of the output_dataset at submission.
`start_timestamp`	`datetime`	Timestamp of when the run began.
`end_timestamp`	`Optional[datetime]`	Timestamp of when the run ended or failed.
`status`	`str`	Status of the run.
`log`	`Optional[str]`	Forward of the workflow logs.
`user_email`	`str`	Email address of the user who submitted the job.
`slurm_account`	`Optional[str]`	Account to be used when submitting the job to SLURM (see "account" option in `sbatch` documentation).
`first_task_index`	`int`
`last_task_index`	`int`

Source code in fractal_server/app/models/v1/job.py

class ApplyWorkflow(_ApplyWorkflowBaseV1, SQLModel, table=True):
    """
    Represent a workflow run

    This table is responsible for storing the state of a workflow execution in
    the database.

    Attributes:
        id:
            Primary key.
        project_id:
            ID of the project the workflow belongs to, or `None` if the project
            was deleted.
        input_dataset_id:
            ID of the input dataset, or `None` if the dataset was deleted.
        output_dataset_id:
            ID of the output dataset, or `None` if the dataset was deleted.
        workflow_id:
            ID of the workflow being applied, or `None` if the workflow was
            deleted.
        status:
            Job status
        workflow_dump:
            Copy of the submitted workflow at submission.
        input_dataset_dump:
            Copy of the input_dataset at submission.
        output_dataset_dump:
            Copy of the output_dataset at submission.
        start_timestamp:
            Timestamp of when the run began.
        end_timestamp:
            Timestamp of when the run ended or failed.
        status:
            Status of the run.
        log:
            Forward of the workflow logs.
        user_email:
            Email address of the user who submitted the job.
        slurm_account:
            Account to be used when submitting the job to SLURM (see "account"
            option in [`sbatch`
            documentation](https://slurm.schedmd.com/sbatch.html#SECTION_OPTIONS)).
        first_task_index:
        last_task_index:
    """

    class Config:
        arbitrary_types_allowed = True

    id: Optional[int] = Field(default=None, primary_key=True)

    project_id: Optional[int] = Field(foreign_key="project.id")
    workflow_id: Optional[int] = Field(foreign_key="workflow.id")
    input_dataset_id: Optional[int] = Field(foreign_key="dataset.id")
    output_dataset_id: Optional[int] = Field(foreign_key="dataset.id")

    user_email: str = Field(nullable=False)
    slurm_account: Optional[str]

    input_dataset_dump: dict[str, Any] = Field(
        sa_column=Column(JSON, nullable=False)
    )
    output_dataset_dump: dict[str, Any] = Field(
        sa_column=Column(JSON, nullable=False)
    )
    workflow_dump: dict[str, Any] = Field(
        sa_column=Column(JSON, nullable=False)
    )
    project_dump: dict[str, Any] = Field(
        sa_column=Column(JSON, nullable=False)
    )

    working_dir: Optional[str]
    working_dir_user: Optional[str]
    first_task_index: int
    last_task_index: int

    start_timestamp: datetime = Field(
        default_factory=get_timestamp,
        sa_column=Column(DateTime(timezone=True), nullable=False),
    )
    end_timestamp: Optional[datetime] = Field(
        default=None, sa_column=Column(DateTime(timezone=True))
    )
    status: str = JobStatusTypeV1.SUBMITTED
    log: Optional[str] = None

`Dataset` ¶

Bases: _DatasetBaseV1, SQLModel

Represent a dataset

Attributes:

Name	Type	Description
`id`	`Optional[int]`	Primary key
`project_id`	`int`	ID of the project the workflow belongs to.
`meta`	`dict[str, Any]`	Metadata of the Dataset
`history`	`list[dict[str, Any]]`	History of the Dataset
`resource_list`	`list[Resource]`	(Mapper attribute)

Source code in fractal_server/app/models/v1/dataset.py

class Dataset(_DatasetBaseV1, SQLModel, table=True):
    """
    Represent a dataset

    Attributes:
        id:
            Primary key
        project_id:
            ID of the project the workflow belongs to.
        meta:
            Metadata of the Dataset
        history:
            History of the Dataset
        resource_list:
            (Mapper attribute)

    """

    id: Optional[int] = Field(default=None, primary_key=True)
    project_id: int = Field(foreign_key="project.id")
    project: "Project" = Relationship(  # noqa: F821
        sa_relationship_kwargs=dict(lazy="selectin"),
    )

    resource_list: list[Resource] = Relationship(
        sa_relationship_kwargs={
            "lazy": "selectin",
            "order_by": "Resource.id",
            "collection_class": ordering_list("id"),
            "cascade": "all, delete-orphan",
        }
    )

    meta: dict[str, Any] = Field(sa_column=Column(JSON), default={})
    history: list[dict[str, Any]] = Field(
        sa_column=Column(JSON, server_default="[]", nullable=False)
    )

    timestamp_created: datetime = Field(
        default_factory=get_timestamp,
        sa_column=Column(DateTime(timezone=True), nullable=False),
    )

    class Config:
        arbitrary_types_allowed = True

    @property
    def paths(self) -> list[str]:
        return [r.path for r in self.resource_list]

`JobStatusTypeV1` ¶

Bases: str, Enum

Define the available job statuses

Attributes:

Name	Type	Description
`SUBMITTED`		The job was created. This does not guarantee that it was also submitted to an executor (e.g. other errors could have prevented this), nor that it is actually running (e.g. SLURM jobs could be still in the queue).
`DONE`		The job successfully reached its end.
`FAILED`		The workflow terminated with an error.

Source code in fractal_server/app/schemas/v1/applyworkflow.py

class JobStatusTypeV1(str, Enum):
    """
    Define the available job statuses

    Attributes:
        SUBMITTED:
            The job was created. This does not guarantee that it was also
            submitted to an executor (e.g. other errors could have prevented
            this), nor that it is actually running (e.g. SLURM jobs could be
            still in the queue).
        DONE:
            The job successfully reached its end.
        FAILED:
            The workflow terminated with an error.
    """

    SUBMITTED = "submitted"
    DONE = "done"
    FAILED = "failed"

`OAuthAccount` ¶

Bases: SQLModel

ORM model for OAuth accounts (oauthaccount database table).

This class is based on fastapi_users_db_sqlmodel::SQLModelBaseOAuthAccount. Original Copyright: 2021 François Voron, released under MIT licence.

Attributes:

Name	Type	Description
`id`	`Optional[int]`
`user_id`	`int`
`user`	`Optional[UserOAuth]`
`oauth_name`	`str`
`access_token`	`str`
`expires_at`	`Optional[int]`
`refresh_token`	`Optional[str]`
`account_id`	`str`
`account_email`	`str`

Source code in fractal_server/app/models/security.py

class OAuthAccount(SQLModel, table=True):
    """
    ORM model for OAuth accounts (`oauthaccount` database table).

    This class is based on fastapi_users_db_sqlmodel::SQLModelBaseOAuthAccount.
    Original Copyright: 2021 François Voron, released under MIT licence.

    Attributes:
        id:
        user_id:
        user:
        oauth_name:
        access_token:
        expires_at:
        refresh_token:
        account_id:
        account_email:
    """

    __tablename__ = "oauthaccount"

    id: Optional[int] = Field(default=None, primary_key=True)
    user_id: int = Field(foreign_key="user_oauth.id", nullable=False)
    user: Optional["UserOAuth"] = Relationship(back_populates="oauth_accounts")
    oauth_name: str = Field(index=True, nullable=False)
    access_token: str = Field(nullable=False)
    expires_at: Optional[int] = Field(nullable=True)
    refresh_token: Optional[str] = Field(nullable=True)
    account_id: str = Field(index=True, nullable=False)
    account_email: str = Field(nullable=False)

    class Config:
        orm_mode = True

`State` ¶

Bases: SQLModel

Store arbitrary data in the database

This table is just a state interchange that allows the system to store arbitrary data for later retrieval. This is particuarly important for long background tasks, in which it is not possible to return a meaningful response to the client within a single request lifespan.

Attributes:

Name	Type	Description
`id`	`Optional[int]`	Primary key
`data`	`dict[str, Any]`	Content of the `State`
`timestamp`	`datetime`	Timestap of the `State`

Source code in fractal_server/app/models/v1/state.py

class State(SQLModel, table=True):
    """
    Store arbitrary data in the database

    This table is just a state interchange that allows the system to store
    arbitrary data for later retrieval. This is particuarly important for long
    background tasks, in which it is not possible to return a meaningful
    response to the client within a single request lifespan.

    Attributes:
        id: Primary key
        data: Content of the `State`
        timestamp: Timestap of the `State`
    """

    id: Optional[int] = Field(default=None, primary_key=True)
    data: dict[str, Any] = Field(sa_column=Column(JSON), default={})
    timestamp: datetime = Field(
        default_factory=get_timestamp,
        sa_column=Column(DateTime(timezone=True)),
    )

`Task` ¶

Bases: _TaskBaseV1, SQLModel

Task model

Attributes:

Name	Type	Description
`id`	`Optional[int]`	Primary key
`command`	`str`	Executable command
`input_type`	`str`	Expected type of input `Dataset`
`output_type`	`str`	Expected type of output `Dataset`
`meta`	`Optional[dict[str, Any]]`	Additional metadata related to execution (e.g. computational resources)
`source`	`str`	inherited from `_TaskBase`
`name`	`str`	inherited from `_TaskBase`
`args_schema`	`Optional[dict[str, Any]]`	JSON schema of task arguments
`args_schema_version`	`Optional[str]`	label pointing at how the JSON schema of task arguments was generated

Source code in fractal_server/app/models/v1/task.py

class Task(_TaskBaseV1, SQLModel, table=True):
    """
    Task model

    Attributes:
        id: Primary key
        command: Executable command
        input_type: Expected type of input `Dataset`
        output_type: Expected type of output `Dataset`
        meta:
            Additional metadata related to execution (e.g. computational
            resources)
        source: inherited from `_TaskBase`
        name: inherited from `_TaskBase`
        args_schema: JSON schema of task arguments
        args_schema_version:
            label pointing at how the JSON schema of task arguments was
            generated
    """

    id: Optional[int] = Field(default=None, primary_key=True)
    name: str
    command: str
    source: str = Field(unique=True)
    input_type: str
    output_type: str
    meta: Optional[dict[str, Any]] = Field(sa_column=Column(JSON), default={})
    owner: Optional[str] = None
    version: Optional[str] = None
    args_schema: Optional[dict[str, Any]] = Field(
        sa_column=Column(JSON), default=None
    )
    args_schema_version: Optional[str]
    docs_info: Optional[str] = None
    docs_link: Optional[HttpUrl] = None

    @property
    def parallelization_level(self) -> Optional[str]:
        try:
            return self.meta["parallelization_level"]
        except KeyError:
            return None

    @property
    def is_parallel(self) -> bool:
        return bool(self.parallelization_level)

    @property
    def default_args_from_args_schema(self) -> dict[str, Any]:
        """
        Extract default arguments from args_schema
        """
        # Return {} if there is no args_schema
        if self.args_schema is None:
            return {}
        # Try to construct default_args
        try:
            default_args = {}
            properties = self.args_schema["properties"]
            for prop_name, prop_schema in properties.items():
                default_value = prop_schema.get("default", None)
                if default_value is not None:
                    default_args[prop_name] = default_value
            return default_args
        except KeyError as e:
            logging.warning(
                "Cannot set default_args from args_schema="
                f"{json.dumps(self.args_schema)}\n"
                f"Original KeyError: {str(e)}"
            )
            return {}

`default_args_from_args_schema: dict[str, Any]` `property` ¶

Extract default arguments from args_schema

`TaskGroupV2` ¶

Bases: SQLModel

Source code in fractal_server/app/models/v2/task_group.py

class TaskGroupV2(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    task_list: list[TaskV2] = Relationship(
        sa_relationship_kwargs=dict(
            lazy="selectin", cascade="all, delete-orphan"
        ),
    )

    user_id: int = Field(foreign_key="user_oauth.id")
    user_group_id: Optional[int] = Field(foreign_key="usergroup.id")

    origin: str
    pkg_name: str
    version: Optional[str] = None
    python_version: Optional[str] = None
    path: Optional[str] = None
    wheel_path: Optional[str] = None
    pip_extras: Optional[str] = None
    pinned_package_versions: dict[str, str] = Field(
        sa_column=Column(
            JSON,
            server_default="{}",
            default={},
            nullable=True,
        ),
    )
    pip_freeze: Optional[str] = None
    venv_path: Optional[str] = None
    venv_size_in_kB: Optional[int] = None
    venv_file_number: Optional[int] = None

    active: bool = True
    timestamp_created: datetime = Field(
        default_factory=get_timestamp,
        sa_column=Column(DateTime(timezone=True), nullable=False),
    )
    timestamp_last_used: datetime = Field(
        default_factory=get_timestamp,
        sa_column=Column(
            DateTime(timezone=True),
            nullable=False,
            server_default=(
                datetime(2024, 11, 20, tzinfo=timezone.utc).isoformat()
            ),
        ),
    )

    @property
    def pip_install_string(self) -> str:
        """
        Prepare string to be used in `python -m pip install`.
        """
        extras = f"[{self.pip_extras}]" if self.pip_extras is not None else ""

        if self.wheel_path is not None:
            return f"{self.wheel_path}{extras}"
        else:
            if self.version is None:
                raise ValueError(
                    "Cannot run `pip_install_string` with "
                    f"{self.pkg_name=}, {self.wheel_path=}, {self.version=}."
                )
            return f"{self.pkg_name}{extras}=={self.version}"

    @property
    def pinned_package_versions_string(self) -> str:
        """
        Prepare string to be used in `python -m pip install`.
        """
        if self.pinned_package_versions is None:
            return ""
        output = " ".join(
            [
                f"{key}=={value}"
                for key, value in self.pinned_package_versions.items()
            ]
        )
        return output

`pinned_package_versions_string: str` `property` ¶

Prepare string to be used in python -m pip install.

`pip_install_string: str` `property` ¶

Prepare string to be used in python -m pip install.

`UserGroup` ¶

Bases: SQLModel

ORM model for the usergroup database table.

Attributes:

Name	Type	Description
`id`	`Optional[int]`	ID of the group
`name`	`str`	Name of the group
`timestamp_created`	`datetime`	Time of creation

Source code in fractal_server/app/models/security.py

class UserGroup(SQLModel, table=True):
    """
    ORM model for the `usergroup` database table.

    Attributes:
        id: ID of the group
        name: Name of the group
        timestamp_created: Time of creation
    """

    id: Optional[int] = Field(default=None, primary_key=True)
    name: str = Field(unique=True)
    timestamp_created: datetime = Field(
        default_factory=get_timestamp,
        sa_column=Column(DateTime(timezone=True), nullable=False),
    )
    viewer_paths: list[str] = Field(
        sa_column=Column(JSON, server_default="[]", nullable=False)
    )

`UserOAuth` ¶

Bases: SQLModel

ORM model for the user_oauth database table.

This class is a modification of SQLModelBaseUserDB from from fastapi_users_db_sqlmodel. Original Copyright: 2022 François Voron, released under MIT licence.

Attributes:

Name	Type	Description
`id`	`Optional[int]`
`email`	`EmailStr`
`hashed_password`	`str`
`is_active`	`bool`
`is_superuser`	`bool`
`is_verified`	`bool`
`slurm_user`	`bool`
`slurm_accounts`	`bool`
`username`	`Optional[str]`
`oauth_accounts`	`list[OAuthAccount]`

Source code in fractal_server/app/models/security.py

class UserOAuth(SQLModel, table=True):
    """
    ORM model for the `user_oauth` database table.

    This class is a modification of SQLModelBaseUserDB from from
    fastapi_users_db_sqlmodel. Original Copyright: 2022 François Voron,
    released under MIT licence.

    Attributes:
        id:
        email:
        hashed_password:
        is_active:
        is_superuser:
        is_verified:
        slurm_user:
        slurm_accounts:
        username:
        oauth_accounts:
    """

    __tablename__ = "user_oauth"

    id: Optional[int] = Field(default=None, primary_key=True)

    email: EmailStr = Field(
        sa_column_kwargs={"unique": True, "index": True}, nullable=False
    )
    hashed_password: str
    is_active: bool = Field(True, nullable=False)
    is_superuser: bool = Field(False, nullable=False)
    is_verified: bool = Field(False, nullable=False)

    username: Optional[str]

    oauth_accounts: list["OAuthAccount"] = Relationship(
        back_populates="user",
        sa_relationship_kwargs={"lazy": "joined", "cascade": "all, delete"},
    )

    user_settings_id: Optional[int] = Field(
        foreign_key="user_settings.id", default=None
    )
    settings: Optional[UserSettings] = Relationship(
        sa_relationship_kwargs=dict(lazy="selectin", cascade="all, delete")
    )

    class Config:
        orm_mode = True

`Workflow` ¶

Bases: _WorkflowBaseV1, SQLModel

Workflow

Attributes:

Name	Type	Description
`id`	`Optional[int]`	Primary key
`project_id`	`int`	ID of the project the workflow belongs to.
`task_list`	`list[WorkflowTask]`	List of associations to tasks.

Source code in fractal_server/app/models/v1/workflow.py

class Workflow(_WorkflowBaseV1, SQLModel, table=True):
    """
    Workflow

    Attributes:
        id:
            Primary key
        project_id:
            ID of the project the workflow belongs to.
        task_list:
            List of associations to tasks.
    """

    id: Optional[int] = Field(default=None, primary_key=True)
    project_id: int = Field(foreign_key="project.id")
    project: "Project" = Relationship(  # noqa: F821
        sa_relationship_kwargs=dict(lazy="selectin"),
    )

    task_list: list[WorkflowTask] = Relationship(
        sa_relationship_kwargs=dict(
            lazy="selectin",
            order_by="WorkflowTask.order",
            collection_class=ordering_list("order"),
            cascade="all, delete-orphan",
        ),
    )
    timestamp_created: datetime = Field(
        default_factory=get_timestamp,
        sa_column=Column(DateTime(timezone=True), nullable=False),
    )

    @property
    def input_type(self):
        return self.task_list[0].task.input_type

    @property
    def output_type(self):
        return self.task_list[-1].task.output_type

`WorkflowTask` ¶

Bases: _WorkflowTaskBaseV1, SQLModel

A Task as part of a Workflow

This is a crossing table between Task and Workflow. In addition to the foreign keys, it allows for parameter overriding and keeps the order within the list of tasks of the workflow.

Attributes:

Name	Type	Description
`id`	`Optional[int]`	Primary key
`workflow_id`	`int`	ID of the `Workflow` the `WorkflowTask` belongs to
`task_id`	`int`	ID of the task corresponding to the `WorkflowTask`
`order`	`Optional[int]`	Positional order of the `WorkflowTask` in `Workflow.task_list`
`meta`	`Optional[dict[str, Any]]`	Additional parameters useful for execution
`args`	`Optional[dict[str, Any]]`	Task arguments
`task`	`Task`	`Task` object associated with the current `WorkflowTask`

Source code in fractal_server/app/models/v1/workflow.py

class WorkflowTask(_WorkflowTaskBaseV1, SQLModel, table=True):
    """
    A Task as part of a Workflow

    This is a crossing table between Task and Workflow. In addition to the
    foreign keys, it allows for parameter overriding and keeps the order
    within the list of tasks of the workflow.


    Attributes:
        id:
            Primary key
        workflow_id:
            ID of the `Workflow` the `WorkflowTask` belongs to
        task_id:
            ID of the task corresponding to the `WorkflowTask`
        order:
            Positional order of the `WorkflowTask` in `Workflow.task_list`
        meta:
            Additional parameters useful for execution
        args:
            Task arguments
        task:
            `Task` object associated with the current `WorkflowTask`

    """

    class Config:
        arbitrary_types_allowed = True
        fields = {"parent": {"exclude": True}}

    id: Optional[int] = Field(default=None, primary_key=True)

    workflow_id: int = Field(foreign_key="workflow.id")
    task_id: int = Field(foreign_key="task.id")
    order: Optional[int]
    meta: Optional[dict[str, Any]] = Field(sa_column=Column(JSON))
    args: Optional[dict[str, Any]] = Field(sa_column=Column(JSON))
    task: Task = Relationship(sa_relationship_kwargs=dict(lazy="selectin"))

    @validator("args")
    def validate_args(cls, value: dict = None):
        """
        Prevent fractal task reserved parameter names from entering args

        Forbidden argument names are `input_paths`, `output_path`, `metadata`,
        `component`.
        """
        if value is None:
            return
        forbidden_args_keys = {
            "input_paths",
            "output_path",
            "metadata",
            "component",
        }
        args_keys = set(value.keys())
        intersect_keys = forbidden_args_keys.intersection(args_keys)
        if intersect_keys:
            raise ValueError(
                "`args` contains the following forbidden keys: "
                f"{intersect_keys}"
            )
        return value

    @property
    def is_parallel(self) -> bool:
        return self.task.is_parallel

    @property
    def parallelization_level(self) -> Union[str, None]:
        return self.task.parallelization_level

`validate_args(value=None)` ¶

Prevent fractal task reserved parameter names from entering args

Forbidden argument names are input_paths, output_path, metadata, component.

Source code in fractal_server/app/models/v1/workflow.py

@validator("args")
def validate_args(cls, value: dict = None):
    """
    Prevent fractal task reserved parameter names from entering args

    Forbidden argument names are `input_paths`, `output_path`, `metadata`,
    `component`.
    """
    if value is None:
        return
    forbidden_args_keys = {
        "input_paths",
        "output_path",
        "metadata",
        "component",
    }
    args_keys = set(value.keys())
    intersect_keys = forbidden_args_keys.intersection(args_keys)
    if intersect_keys:
        raise ValueError(
            "`args` contains the following forbidden keys: "
            f"{intersect_keys}"
        )
    return value

`get_timestamp()` ¶

Get timezone aware timestamp.

Source code in fractal_server/utils.py

def get_timestamp() -> datetime:
    """
    Get timezone aware timestamp.
    """
    return datetime.now(tz=timezone.utc)

models

ApplyWorkflow ¶

Dataset ¶

JobStatusTypeV1 ¶

OAuthAccount ¶

State ¶

Task ¶

default_args_from_args_schema: dict[str, Any] property ¶

TaskGroupV2 ¶

pinned_package_versions_string: str property ¶

pip_install_string: str property ¶

UserGroup ¶

UserOAuth ¶

Workflow ¶

WorkflowTask ¶

validate_args(value=None) ¶

get_timestamp() ¶

`ApplyWorkflow` ¶

`Dataset` ¶

`JobStatusTypeV1` ¶

`OAuthAccount` ¶

`State` ¶

`Task` ¶

`default_args_from_args_schema: dict[str, Any]` `property` ¶

`TaskGroupV2` ¶

`pinned_package_versions_string: str` `property` ¶

`pip_install_string: str` `property` ¶

`UserGroup` ¶

`UserOAuth` ¶

`Workflow` ¶

`WorkflowTask` ¶

`validate_args(value=None)` ¶

`get_timestamp()` ¶