set array of data into mobx array show proxy objects

Question

I'm using react js with mobx and I get data from api. the data I get is array of objects. when I set the data into mobx variable then I see array of proxy objects(not sure what the proxy says). I'm trying just to set the array of objects I get from api into mobx variable.

my store

class UserStore {
@persist @observable token = null
@observable tasks = []
@observable done = false

@persist @observable email = ''

constructor() {

}
@action
getTasks = async () => {
    try {
        let response = await Api.getTasks()
        console.log('getTasks',response.tasks)
        this.tasks = response.tasks
        console.log('my new tasks',this.tasks)

    } catch (e) {
        console.log(e)
    }
}

as you can see here in the first block('black') the data i get from api, then i set the respnse.tasks into this.tasks.

 this.tasks = response.tasks
  console.log('my new tasks',this.tasks)

Is this code not working for you? MobX 5 uses Proxies under the hood, so that in itself is nothing strange. — Tholle, Jul 31 '18 at 01:32
the code is working but I can't use this.tasks and display the tasks. — Manspof, Jul 31 '18 at 04:53

score 27 · Answer 1 · edited Feb 06 '21 at 08:25

27

You can convert proxy to JS:

import { toJS } from 'mobx'

// example
toJS(response)

edited Feb 06 '21 at 08:25

deadcoder0904

3,758
1
27
91

answered Apr 26 '19 at 07:33

Tarun konda

1,075
9
18

This would be the accepted answer. – Mark Andog Feb 28 '21 at 07:06

score 7 · Accepted Answer · answered Jul 31 '18 at 08:23

It depends on how you want to observe the data.

"I'm trying just to set the array of objects I get from api into mobx variable"

is not really your end-goal.

If you want your observers to:

option a: react when the array reference change
= No care for values in the array.
Use @observable.ref tasks.
option b: react when the references of each value in the array change
= No care for the individual objects properties.
Use @observable.shallow tasks.
option c: react on the individual objects properties too
= Make everything observable, references and object properties
Use @observable tasks like you do.

Like indicated in the comments, mobx5 is using Proxy and some behaviour might differ compared to previous version.

More info: Mobx arrays, Mobx decorators, shallow observability

Note: you would need to give more details if this does not help you, like your react component code.

set array of data into mobx array show proxy objects

2 Answers2