Asynchnous transformer

[fedulovivan]

Hello, trying to work with redux-api using whatwg fetch polyfill as adapter.
The issue is that build-in transformer functionality provides synchronous interface.
When we deal with whatwg fetch, response body (json in my case) is being obtained via promise, so there is no elegant way to obtain it within transformer, modify and return in a transformed form.

transformer: data => {
  data.json().then(json=>{
     // here i need to make any transformations on json
     // ready im ready to provide results
 })  
}

[lexich]

Transformer receive data, not promise. https://github.com/lexich/redux-api/blob/master/src/adapters/fetch.js If you want custom adapter for endpoint you should use

reduxApi({
endpoint: {
  url: "/api/endpoint",
  fetch(url, opts) {
    // return Promise with data, not Promise with Promise
  }
}
})

[fedulovivan]

But when we using following suggested adapter:

function adapterFetch(url, options) {
  return fetch(url, options);
}

Transformer receives Response
How it could be transformed?

[lexich]

It's wrong realization of adapter.

[fedulovivan]

I think documentation should be corrected then. To avoid confusing of future users.

[lexich]

Need to fix documentation.