What is the method for retrieving data from a node in Firebase Realtime Database using TypeScript cloud functions, without relying on the onCreate trigger?

Being a beginner with Firebase and TypeScript, I have been struggling to retrieve values from a reference other than the triggered value. Despite finding answers in JavaScript, I am working on writing functions using TypeScript for real-time database for Android.

Here is the link to an image of my database.

In the image above, I have written an OnCreate trigger in TypeScript at the node -

Trips / { uId } / { tId }

Whenever this trigger is activated, I wish to write data at the same location but under the node -

Cars / { carId }

Could someone please guide me on how to fetch data from a node other than the one that was triggered?

Thank you in advance.

androidtypescriptfirebasefirebase-realtime-databasegoogle-cloud-functions

Answer №1

When comparing TypeScript to JavaScript, it's important to note that the APIs are essentially the same. There isn't anything uniquely "special" for TypeScript that sets it apart from JavaScript in terms of working with APIs. It's recommended to refer to the JavaScript API documentation for both languages to have a clear understanding of how things function.

For libraries that offer type bindings for TypeScript, you will have more specific information regarding argument types and return values within your code editor. However, the following advice is relevant for both TypeScript and JavaScript users alike.

When dealing with Database triggers, using an onCreate will supply you with a DataSnapshot as the initial parameter. This DataSnapshot object contains a ref property that indicates the location of the update. To access other areas within the database, simply utilize the root property of the reference to reach the top level of the database. From there, you can construct additional references to any locations of interest.

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