Consider an example that you can set up a rule to provision a user in an application only if their type is Agent and they have a specific role.

Managing such rules often involves complexities like fetching user-selected properties or making multiple API calls and the Rule Engine simplifies this process.

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Configuring Rule Engine in Cobalt

To configure the Rule Engine:

1

Navigate

Navigate to the integration in Cobalt and click on Config Portal.

2

Create Dataslot

Create a new dataslot and set its type to Rule Engine.

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Rule Engine Columns

Rule Engine has 3 columns:

  • LHS - This column lets users select the option that they want to use in the rule.

  • Operator - This column lets users select the operator that they want to use with the LHS value.

  • RHS - The value to compare against the LHS field.

After you create a Rule Engine dataslot, you can configure the Options that you want to show for the LHS column.

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Dynamic Columns and Operators using Conditional Code

If your use case requires you to use dynamic options you can select Use Data Source and select a workflow that responds with a list of options instead.

The Rule Engine provides a Conditional Code block for advanced customizations. This block allows you to dynamically set Operators and RHS values based on the selected LHS.

A sample code snippet is available in the Rule Engine settings to help you get started.

sample
// NOTE: remove this sample code if you don't plan on using any dynamic columns
async function main() {
    // check whether the `lhs` column's value is set to "Region"
    if (lhs === "Region") {
        // define the operators
        const operatorOptions = [
            {
                "name": "Equals To",
                "value": "eq"
            },
            {
                "name": "Not Equals To",
                "value": "neq"
            }
        ]
        // set operator column properties
        cobaltRuleEngine.setColumnProperties("operator", operatorOptions)

        // run the `get_regions` workflow to get the list of regions and set it as options for the rhs column
        const rhsOptions = await cobaltDataSource.getDataSourceResponse("get_regions", {}).return_value
        // set rhs column properties
        cobaltRuleEngine.setColumnProperties("rhs", rhsOptions)

        // log the rhs options. you'll see the logs when you call the `getRuleFieldOptions` method in Cobalt SDK
        console.log("RHS Options", rhsOptions)
    } else {
        // define the operators
        const operatorOptions = [
            {
                "name": "Equals To",
                "value": "eq"
            },
            {
                "name": "Not Equals To",
                "value": "neq"
            },
            {
                "name": "Includes",
                "value": "includes"
            }
        ]
        // set operator column properties
        cobaltRuleEngine.setColumnProperties("operator", operatorOptions)
        // set rhs column properties
        cobaltRuleEngine.setColumnProperties("rhs")
    }
}

main()

Use method cobaltRuleEngine.setColumnProperties to modify available options dynamically.

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