Creating the ideal Typescript Interface for a Firebase Response JSON: Best Practices

I am receiving a JSON response from Firebase with the following format:

{ "-KD8Evk7TULU6t6zxMHl": { "createdAt": 1458296568840, "isActive": true, "title": "...add a title", "updatedAt": 1458296568840 } }

Question Part One: How should I define my Typescript Interface for this specific JSON structure? Should it look something like the example provided below?

export interface Hero {
  [id: string]: {
    createdAt: number;
    isActive: boolean;
    title: string;
    updatedAt: number;
  }
}

Question Part Two: What is the recommended way to access the title or id of a hero using the Typescript interface mentioned above? For instance, if I want to showcase the hero's id and title on a webpage.

<html>
  ...omitted code for brevity. Displaying hero id and title below.
  <h1> {{ hero.id }} </h1>
  <h1> {{ hero.title }} </h1>
</html>

Answer №1

  1. Step 1

To simplify the process, consider creating a class with a "keyId" property to store the ID retrieved from the firebase response object ("-KD8Evk7TULU6t6zxMHl"). By assigning the received ID to the keyId property in the constructor, you can streamline the implementation. However, this approach may require creating a new class for each line of JSON data.

  1. Step 2

If you opt to stick with option 1, you will need to access your object using the "Object" class method: hero[Object.keys(hero)[0]].title or simply Object.keys(hero)[0] if you only need the ID. While this method can be cumbersome, it may be necessary unless you switch to a class interface with a constructor as previously mentioned. With the revised approach, you could access the title through hero[hero.keyId].title or retrieve the ID directly with hero.keyId.

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