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Object Models

ObjectModels(perfdb)

Class used for handling object models. Can be accessed via perfdb.objects.models.

Parameters:

  • perfdb

    (PerfDB) –

    Top level object carrying all functionality and the connection handler.

Source code in echo_postgres/object_models.py
Python
def __init__(self, perfdb: e_pg.PerfDB) -> None:
    """Class used for handling object models. Can be accessed via `perfdb.objects.models`.

    Parameters
    ----------
    perfdb : PerfDB
        Top level object carrying all functionality and the connection handler.
    """
    super().__init__(perfdb)

    from .object_model_attributes import ObjectModelAttributes

    # * subclasses

    self.attributes = ObjectModelAttributes(perfdb)

get(object_models=None, object_types=None, filter_type='and', get_attributes=False, output_type='dict')

Gets all object models definitions with detailed information.

The most useful keys/columns returned are:

  • id
  • display_name
  • description
  • object_type_name

Parameters:

  • object_models

    (list[str] | None, default: None ) –

    List of object model names to filter the results. By default None

  • object_types

    (list[str] | None, default: None ) –

    List of object type names to filter the results. By default None

  • filter_type

    (Literal['and', 'or'], default: 'and' ) –

    How to treat multiple filters. Can be one of ["and", "or"]. By default "and"

  • get_attributes

    (bool, default: False ) –

    If True, will also get the attributes of the object models.

  • output_type

    (Literal['dict', 'DataFrame', 'pl.DataFrame'], default: 'dict' ) –

    Output type of the data. Can be one of ["dict", "DataFrame", "pl.DataFrame"] By default "dict"

Returns:

  • dict[str, dict[str, str | int]] –

    In case output_type is "dict", returns a dictionary in the format {name: {attribute: value, ...}, ...}

  • DataFrame –

    In case output_type is "DataFrame", returns a pandas DataFrame with the following format: index = name, columns = [attribute, ...]

  • DataFrame –

    In case output_type is "pl.DataFrame", returns a Polars DataFrame

Source code in echo_postgres/object_models.py
Python
@validate_call
def get(
    self,
    object_models: list[str] | None = None,
    object_types: list[str] | None = None,
    filter_type: Literal["and", "or"] = "and",
    get_attributes: bool = False,
    output_type: Literal["dict", "DataFrame", "pl.DataFrame"] = "dict",
) -> dict[str, dict[str, str | int]] | pd.DataFrame | pl.DataFrame:
    """Gets all object models definitions with detailed information.

    The most useful keys/columns returned are:

    - id
    - display_name
    - description
    - object_type_name

    Parameters
    ----------
    object_models : list[str] | None, optional
        List of object model names to filter the results.
        By default None
    object_types : list[str] | None, optional
        List of object type names to filter the results.
        By default None
    filter_type : Literal["and", "or"], optional
        How to treat multiple filters. Can be one of ["and", "or"].
        By default "and"
    get_attributes : bool, optional
        If True, will also get the attributes of the object models.
    output_type : Literal["dict", "DataFrame", "pl.DataFrame"], optional
        Output type of the data. Can be one of ["dict", "DataFrame", "pl.DataFrame"]
        By default "dict"

    Returns
    -------
    dict[str, dict[str, str | int]]
        In case output_type is "dict", returns a dictionary in the format {name: {attribute: value, ...}, ...}
    pd.DataFrame
        In case output_type is "DataFrame", returns a pandas DataFrame with the following format: index = name, columns = [attribute, ...]
    pl.DataFrame
        In case output_type is "pl.DataFrame", returns a Polars DataFrame
    """
    # checking inputs
    where = self._check_get_args(object_models, object_types, filter_type)

    query = [
        sql.SQL("SELECT * FROM performance.v_object_models "),
        where,
        sql.SQL(" ORDER BY name"),
    ]
    query = sql.Composed(query)

    df = self._perfdb.conn.read_to_polars(query)

    # getting attributes
    if get_attributes:
        # names of the object models
        got_object_models = df["name"].to_list()
        attrs: pl.DataFrame = self._perfdb.objects.models.attributes.get(
            object_models=got_object_models,
            output_type="pl.DataFrame",
            values_only=True,
        )
        # pivot the attributes
        attrs = attrs.pivot(index="object_model_name", on="attribute_name", values="attribute_value")
        # merging the attributes with the object models
        df = df.join(attrs, left_on="name", right_on="object_model_name", how="left")

    return convert_output(df, output_type)

get_ids(object_models=None, object_types=None, filter_type='and')

Gets all object models and their respective ids.

Parameters:

  • object_models

    (list[str] | None, default: None ) –

    List of object model names to filter the results. By default None

  • object_types

    (list[str] | None, default: None ) –

    List of object type names to filter the results. By default None

  • filter_type

    (Literal['and', 'or'], default: 'and' ) –

    How to treat multiple filters. Can be one of ["and", "or"]. By default "and"

Returns:

  • dict[str, int] –

    Dictionary with all object models and their respective ids in the format {name: id, ...}.

Source code in echo_postgres/object_models.py
Python
@validate_call
def get_ids(
    self,
    object_models: list[str] | None = None,
    object_types: list[str] | None = None,
    filter_type: Literal["and", "or"] = "and",
) -> dict[str, int]:
    """Gets all object models and their respective ids.

    Parameters
    ----------
    object_models : list[str] | None, optional
        List of object model names to filter the results.
        By default None
    object_types : list[str] | None, optional
        List of object type names to filter the results.
        By default None
    filter_type : Literal["and", "or"], optional
        How to treat multiple filters. Can be one of ["and", "or"].
        By default "and"

    Returns
    -------
    dict[str, int]
        Dictionary with all object models and their respective ids in the format {name: id, ...}.
    """
    # checking inputs
    where = self._check_get_args(object_models, object_types, filter_type)

    query = [
        sql.SQL("SELECT name, id FROM performance.v_object_models "),
        where,
        sql.SQL(" ORDER BY name"),
    ]
    query = sql.Composed(query)

    df = self._perfdb.conn.read_to_polars(query)

    return dict(zip(df["name"].to_list(), df["id"].to_list(), strict=False))