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Version: 0.3.x

SingleSelectParameter

The class for defining and interacting with single-select parameters.

Can be found in the classpath squirrels.parameters.SingleSelectParameter or squirrels.SingleSelectParameter.

Static / Class Methods​

In addition to the static methods specified on this page, see the Parameter page for details on the Create and CreateFromSource factory methods.

For SingleSelectParameter in particular:

  • The all_options argument of the Create factory method must be a sequence of SelectParameterOption instances
  • The data_source argument of the CreateFromSource factory method must be a SelectDataSource

CreateSimple​

Creates the configurations for a single-select parameter by providing a list of SelectParameterOption instances, and adds it to a pool of parameter configurations that datasets can pick from.

Similar to the Create factory method, but without the optional arguments for user_attribute and parent_name. For arguments, see Create in the Parameter page.

Non-Static Methods​

In the context.py file or data model, the methods below can be invoked on a SingleSelectParameter object to retrieve details for the selected parameter option at runtime. For example, the following code demonstrates getting the SingleSelectParameter object in context.py, and calling the "get_selected" method on it.

if sqrl.param_exists("my_ss_param"):
    my_ss_param: sr.SingleSelectParameter = prms["my_ss_param"]
    my_special_field: str = my_ss_param.get_selected("some_field")
    ...

get_selected​

Gets the selected single-select option or selected custom field.

Optional Arguments:

  • field: An optional string for the "custom_fields" attribute to retrieve from the selected option. If None, retrieves the selected SelectParameterOption instance instead. Default is None

Optional Keyword Arguments:

  • default_field: An optional string. If not None, this is used if the "field" argument cannot be found in "custom_fields". Default is None
  • default: A optional value (of any type) to return if the "field" and "default_field" arguments cannot be found in "custom_fields". If None, an error is thrown if "field" and "default_field" arguments cannot be found. Default is None

Returns: The value of the custom field (of any type) or a SelectParameterOption instance if the "field" argument is None.

get_selected_id​

Gets the ID of the selected parameter option. This method takes no arguments.

Returns: A string for the ID.

get_selected_id_quoted​

Gets the ID of the selected parameter option surrounded by single quotes. This method takes no arguments.

Returns: A string for the quoted ID.

get_selected_label​

Gets the label of the selected parameter option. This method takes no arguments.

Returns: A string for the label.

get_selected_label_quoted​

Gets the label of the selected parameter option surrounded by single quotes. This method takes no arguments.

Returns: A string for the quoted label.