Save operation does not set errors

[ax487]

I would appreciate it if you could look into this:

I try to save a model using model.save:

model.save().then((result) => {
  console.log('Save operation finished')
  console.log('Result: ')
  console.log(result)
  console.log('Model:')
  console.log(model)
  console.log('Error in model:')
  console.log(model.error)
})

The server returns a 422 (Unprocessable Entity) error. I see the following:

• The result contains the JSON error from the server.
• The model has previously edited values set.
• The model.error is null

The last point is obviously a problem. Would you consider this a bug? If this is intended, how is it possible to spot the error?

[masylum]

I don't know how to reproduce this. A 422 should halt the save operation and set the payload of the server response as errors. Could you write a failing test for that scenario? Thanks in advance!

[rdiazv]

I ran into this as well. The problem is that the adapters expect that the server returns the errors in the errors key.

https://github.com/masylum/mobx-rest-fetch-adapter/blob/master/src/index.js#L52
https://github.com/masylum/mobx-rest-jquery-adapter/blob/master/src/index.js#L92

I think the adapters shouldn't assume anything regarding to the backend response, or al least we should have some way to customize how to extract the error from the response.

Edit: Actually it wasn't the same scenario. In my case the promise got rejected but I couldn't get the error payload.

[rdiazv]

I think this was the cause masylum/mobx-rest-fetch-adapter#2. @ax487, were you using the fetch adapter?

[masylum]

I think that was the case. We could consider though to remove the assumption that the response always includes an errors key, or at least make it configurable (for backward compatibility).