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@pennlabs/rest-live-hooks

v2.0.2-alpha.0

Published

React hooks for seamlessly integrating django-rest-live.

Downloads

43

Readme

REST Live Hooks

React hooks built to handle CRUD through RESTful APIs and realtime updates through websockets.

This package exposes two hooks, useRealtimeResource and useRealtimeResourceList. Both hooks have identical semantics to the respective hooks found in @pennlabs/rest-hooks, with one important distinction. These realtime hooks enable realtime updates via subscriptions based on the asynchronous websocket API defined by django-rest-live.

Because these hooks return the exact same values as the base rest-hooks, they can be used as drop-in replacements when you want to add realtime features to your React/Django app.

Documentation

Prior Reading

This library relies heavily on django-rest-live and rest-hooks for its functionality. It would be helpful to read through the README documentation for each of those libraries before moving on to this package.

Usage

The realtime hooks differ from the base REST hooks mostly in a subscribeRequest object that's added to every hook call. The object's structure is as follows:

const subscribeRequest = {
  model: "app.Model",
  property: "id",
  value: 5
}
  • model is a string label referring to the django model to subscribe to.
  • property is the optional "group key" discussed in the django-rest-live documentation. If it is not present, it defaults to the id field on the model, which is unique, so no grouping will occur. Make sure to add a group key for useResourceList.
  • value is the value match on for updates, generally an ID, either of the entity (for useRealtimeResource) or the grouped related object (for useRealtimeResource).

Here are the signatures for the two functions:

  • {data, error, isValidating, mutate } = useResource(url, subscribeRequest, configOptions)
  • {data, error, isValidating, mutate } = useResourceList(listUrl, getResourceUrl, subscribeRequest, configOptions)
    • configOptions takes in one additional optional property, sortBy, which will sort newly created elements that are added to the list. This is some code duplication from any ordering enforced on the back-end, but is necessary since the websocket subscription does not include all elements in the list, but only the new one.