Material-table: Issue with Promise.reject()

[JKrymarys]

Hi!
I am trying to add some issue handlers in my table. In remote data Promise I want to use reject, when something will go wrong (according to documentation and tips from other issues).
It's not working correctly tho. I am getting error: _Uncaught (in promise) undefined_.
In the same place resolve (with proper data ofc) is working great.

Unfortunately it doesn't say much, so I have no clue where to look for the error.

Have you ever encounter similar issue?

[AugustoCalaca]

Ideally you should to show the part of your code that is giving error to a accurate answer.
Even so, a possible solution, make sure that you are using .then and .catch correctly.

https://stackoverflow.com/questions/53015074/then-uncaught-in-promise-this-is-undefined
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/then
https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Promise/catch

[JKrymarys]

Thank's for quick answer!
Sure, code would be useful :) I am pasting it below.

I tried to find answers using docs you suggested - unfortunately without success.

```javascript

          data={query =>
            new Promise((resolve, reject) => {
              axios
                .get(url)
                .then(result => {
                  let data = this.buildTableData(result.data.content);
                  resolve({
                    data,
                    page: result.data.pageable.pageNumber,
                    totalCount: result.data.totalElements
                  });
                })
                .catch(error => {
                    reject(); //not working here
                });
            })
          }

````

[mbrn]

Hi @JKrymarys ,

I will look at this asap. Someone else reported this problem.

[iamrenzx]

Hi any updates on this? also having this issue on handling errors.

[imnaveenk]

+1

[ambr89]

Does anyone have resolve???
I don't know why but after error my table is fixed in loading state.
How could escape from this state?

 queryPromise = (query) => new Promise((resolve, reject) => {

        myRequest(query, params)
        .then((response) => {
            //work OK
            this.setState((state, props) => {
                resolve({
                    data: response.data.Data,
                    page: 0,
                    totalCount: response.data.Total,
                  });
            });
        })
        .catch(error => {
            reject(); //not working here
        });

    }).catch(error =>{}); 

Table appears like this:

[Freenex1911]

Instead of reject();, you could return an empty dataset:
resolve({data: [], page: 0, totalCount: 0});
But this is just a temporary solution ...