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Introduction

Mercur uses Algolia as a search engine to boost product search accuracy and serving trending/recommended items. The integration features auto product indexing, whenever any of the product attributes was changed or a new product review is created.

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Setup

In order to use Algolia, an account is needed. After registration, enter ALGOLIA_APP_ID and ALGOLIA_API_KEY obtained from the Algolia dashboard into the .env file. Then, run the sync-algolia script, in order to apply the default settings, and synchronize already existing products/reviews. Run the following command from the apps/backend catalog: 
npx medusa exec ./src/scripts/sync-algolia.ts

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Configuration

The default configuration is present in the apps/backend/src/modules/algolia/service.ts file. You can adjust the defaultProductSettings and defaultReviewSettings to your needs. That includes the searchable fields, facets, relevancy and ranking. See the full settings reference here. Default configuration includes only the searchable fields.

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Events

In order to persist consistency between database and Algolia, every time any change in indexed entities happens an event is emitted, for example:
  • algolia.products.changed
  • algolia.products.deleted
We use also intermediate events, that also should trigger synchronization with Algolia (of related products):
  • algolia.intermediate.fulfillment_set.changed
  • algolia.intermediate.service_zone.changed
  • algolia.intermediate.shipping_option.changed
  • algolia.intermediate.stock_location.changed
  • algolia.intermediate.inventory_item.changed
Each event is connected to the subscriber, which is responsible for refetching the entity and updating it in Algolia.