5.3.3. Service Constraints

This chapter lists constraints to keep in mind when creating a service.

Use Async Methods#

Medusa wraps adds wrappers around your service's methods and executes them as async methods.

So, make sure your service's methods are always async to avoid unexpected errors or behavior.

Code
1import { MedusaService } from "@medusajs/utils"2import MyCustom from "./models/my-custom"3
4class HelloModuleService extends MedusaService({5  MyCustom,6}){7  // Don't8  getMessage(): string {9    return "Hello, World!"10  }11
12  // Do13  async getMessage(): Promise<string> {14    return "Hello, World!"15  }16}17
18export default HelloModuleService

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