options_select type

This reference documents the Slack types at the platform level. Their availability and structure may differ in each SDK

Type: object

Dynamic options in Workflow Builder can be rendered in one of two ways: as a drop-down menu or as a set of fields.

The dynamic input parameter can be rendered as a drop-down menu, which will use the options obtained from a custom step with an options output parameter of the type options_select. The drop-down menu UI component can be rendered in two ways: single-select, or multi-select.

options_select example

To render the dynamic input as a single-select menu, the input parameter defining the dynamic option must be of the type string.

"step-with-dynamic-input": {
    "title": "Step that uses a dynamic input",
    "description": "This step uses a dynamic input rendered as a single-select menu",
    "input_parameters": {
        "dynamic_single_select": {
            "type": "string", // this must be of type string for single-select
            "title": "dynamic single select drop-down menu",
            "description": "A dynamically-populated single-select drop-down menu",
            "is_required": true,
            "dynamic_options": {
                "function": "#/functions/get-options",
                "inputs": {},
            },
        }
    },
    "output_parameters": {}
}

To render the dynamic input as a multi-select menu, the input parameter defining the dynamic option must be of the type array, and its items must be of type string.

"step-with-dynamic-input": {
    "title": "Step that uses a dynamic input",
    "description": "This step uses a dynamic input rendered as a multi-select menu",
    "input_parameters": {
        "dynamic_multi_select": {
            "type": "array", // this must be of type array for multi-select
            "items": {
                "type": "string"
            },
            "title": "dynamic single select drop-down menu",
            "description": "A dynamically-populated multi-select drop-down menu",
            "dynamic_options": {
                "function": "#/functions/get-options",
                "inputs": {},
            },
        }
    },
    "output_parameters": {}
}