Create Custom Rule Actions with the API

Custom rule actions allow you to define a unique action to take when certain conditions are met. They involve three primary components: a query pipeline, a custom rule type, and a rule that is triggered by conditions defined by the user.

This article describes the general workflow for creating a custom rule action. The example assumes the following components are used:

Component Name

Query pipeline

custom-rule-pipeline

Custom rule type

custom-rule-type

Rule

custom-rule-action

  1. Create a query pipeline, custom-rule-pipeline, that is used to complete the rule action.

  2. Create a custom rule type, custom-rule-type, that uses your query pipeline. Here are some important parameters to include in your POST request:

    Required Parameter Description Example

    id

    A unique ID for the custom rule type. The id value must be unique across all apps in Fusion (global namespace).

    custom-rule-type

    pipeline_id

    The ID of the pipeline that is invoked during rule processing.

    custom-rule-pipeline

    display_type

    A user-friendly name for the custom rule type.

    My Custom Rule

    Rule properties, included as part of the schema, define the values required from the user to create a rule that uses the custom rule type.

    custom_param1

    The ID of the rule’s parameter. This field is used in the API but is not visible in the Rules Editor.

    1st-rule-parameter

    type

    The type of user-input.

    string

    title

    A user-friendly name for the parameter.

    Manufacturer

    description

    A user-friendly description of what the field is used for. The description value is shown in the field’s tooltip in the Rules Editor.

    The manufacturer of the product this rule action applies to.

    For example:

    curl -u admin:password123 -XPOST -H "Content-type:application/json" \
    http://fusion-host:6764/api/apps/myFusionApp/custom-rule-types -d '{
      "id":"custom-rule-type",
      "pipeline_id":"custom-rule-pipeline",
      "display_type":"My Custom Rule",
      "schema": {
        "type" : "object",
        "properties" : {
          "custom_param1" : {
            "type" : "string",
            "title" : "Manufacturer",
            "description" : "The manufacturer of the product this rule action applies to."
          },
          "custom_param2" : {
            "type": "string",
            "title": "Type",
            "description": "The type of product this rule action applies to."
          }
        }
      }
    }'
  3. Verify the custom rule type was created by visiting http://fusion-host:6764/api/apps/myFusionApp/custom-rule-types. Custom rule types are also available in the Rules Editor:

    Custom Rule Type in the Rules Editor

  4. Create a rule, custom-rule-action, that uses your custom rule, custom-rule-type. If you’re creating the rule using the Query Rewrite API, the following image depicts which parameters are shared between the custom rule type and the rule:

    Custom rule type and rule parameters

    Note that the custom rule type id value is used for the rule’s type and custom_type fields. Remember to assign values to the custom rule properties, custom_param1 and custom_param2.

    curl -u admin:password123 -XPOST -H "Content-type:application/json" \
    http://localhost:6764/api/apps/myFusionApp/query-rewrite/instances -d '{
      "id":"123456",
      "type":"custom-rule-type",
      "custom_type":"custom-rule-type",
      "name":"My Rule",
      "description":"A rule that uses my custom rule, custom-rule-type.",
      "search_terms":["upcoming sale"],
      "custom_param1":"ABC",
      "custom_param2":"XYZ",
      "pipeline_id":"custom-rule-pipeline",
      "display_type":"My Custom Rule"
    }'
  5. Verify your rule was created by checking the rule ID, 123456, with the Query Rewrite API: http://localhost:6764/api/apps/myFusionApp/query-rewrite/instances/123456

  6. Test your custom rule using your normal rule development process.