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Parameter option for single-select and multi-select parameters. This class can be imported from the squirrels.parameter_options or the squirrels module.

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Constructor

Creates a SelectParameterOption object. Typically used in pyconfigs/parameters.py. 
def __init__(
    self, id: str, label: str, 
    *, is_default: bool = False, user_groups: Iterable[Any] | str = frozenset(), 
    parent_option_ids: Iterable[str] | str = frozenset(), 
    custom_fields: dict[str, Any] = {}, **kwargs
) -> None:

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Examples

A SelectParameterOption object is created in the pyconfigs/parameters.py file. It must be created in a function decorated with the create_with_options or create_simple factory method from SingleSelectParameter or MultiSelectParameter.

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Usage example in parameters.py

from squirrels import parameters as p, parameter_options as po

@p.SingleSelectParameter.create_with_options(
    name="region", 
    label="Region",
    description="Geographic region to filter by"
)
def region_options():
    return [
        po.SelectParameterOption(
            id="north_america", 
            label="North America",
            is_default=True
        ),
        po.SelectParameterOption(
            id="europe", 
            label="Europe"
        ),
        po.SelectParameterOption(
            id="asia_pacific", 
            label="Asia Pacific"
        ),
    ]
In addition, the following are some additional examples for creating a SelectParameterOption object.

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Using custom fields

This example adds custom attributes to parameter options that can be accessed in context.py or the data models directly. Custom fields can be provided as keyword arguments or in the custom_fields dictionary. 
po.SelectParameterOption(
    id="summary", 
    label="Summary Report",
    columns=["date", "category", "total"],
    report_type="summary"
)

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Setting up cascading parameters with parent options

This example shows how to create child options that are only visible when specific parent options are selected. The parent_option_ids field controls this behavior. 
# Parent parameter
@p.SingleSelectParameter.create_with_options(
    name="country", 
    label="Country",
    description="Country to filter by"
)
def country_options():
    return [
      po.SelectParameterOption(id="usa", label="United States")
      po.SelectParameterOption(id="canada", label="Canada")
    ]

# Child parameter with options that cascade based on parent selection
@p.SingleSelectParameter.create_with_options(
    name="city", 
    label="City",
    description="City to filter by",
    parent_name="country" # Name of the parent parameter above
)
def city_options():
    return [
      po.SelectParameterOption(
          id="new-york", 
          label="New York",
          parent_option_ids="usa"  # Only visible when "usa" is selected
      )
      po.SelectParameterOption(
          id="toronto", 
          label="Toronto",
          parent_option_ids="canada"  # Only visible when "canada" is selected
      )
    ]

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Restricting visibility by user groups

This example shows how to restrict certain options to specific user access levels using the user_groups parameter. 
@p.SingleSelectParameter.create_with_options(
    name="report_type", 
    label="Report Type",
    description="Type of report to generate",
    user_attribute="access_level"
)
def report_type_options():
    return [
        po.SelectParameterOption(
            id="basic_report", 
            label="Basic Report",
            user_groups=["admin", "member", "guest"]  # Available to all users
        )
        po.SelectParameterOption(
            id="detailed_report", 
            label="Detailed Report (Admin Only)",
            user_groups=["admin"]  # Only visible to admin users
        )
    ]
If custom user fields are defined in pyconfigs/user.py, then they can be used to restrict visibility of parameter options as well. To do so, the user_attribute argument must be prefixed with custom_fields.. 
@p.SingleSelectParameter.create_with_options(
    name="report_type", 
    label="Report Type",
    description="Type of report to generate",
    user_attribute="custom_fields.role"
)
def report_type_options():
    return [
        po.SelectParameterOption(
            id="basic_report", 
            label="Basic Report",
            user_groups=["manager", "staff"]  # Available to manager and staff users
        )
        po.SelectParameterOption(
            id="detailed_report", 
            label="Detailed Report (Manager Only)",
            user_groups=["manager"]  # Only visible to manager users
        )
    ]