How to handle non explicit errors inside sails.js helpers? - sails.js

Question

I am trying to figure out how the Error handling in Sails.js works. Unfortunatley the code examples in the docs do not cover this use case.
The problem is I keep getting this error:
UsageError: `.intercept()` handler returned `undefined`, but this should never happen.
Regardless, here is a summary of the original underlying error:
Now all I am trying to do is call a helper and if it fails, then I want to catch the error (any), log it and run some code. If I wouldn't be using Sails but normal promises I would have handled it like this:
await helper().catch((err) => { // run some code }
In Sails I should be able to use .intercept() instead of .catch()
My code looks like this:
// ExportController.js
const csv = await sails.helpers.files.convertToCsv(data)
.intercept((err) => {
sails.log.error(err)
req.addFlash('error_messages', 'Error parsing data to csv!')
return res.redirect(`/`);
})
// convert-to-csv.js
if (!Array.isArray(inputs.data)) {
throw new Error('invalid inputs.data type: ' + typeof inputs.data)
};
Now how can I avoid getting this error?
The code examples show only cases where errors that are explicitly added to the exits object are handled, but not for general error handling.
In the docs it says that if the filter argument is
not provided, ALL errors will be intercepted.
Or is that only true for db queries? Because the .intercept() doc section is in that subcategory.

Answer 1

You could use “throw ‘errorCode’;” for example:
Set the exits:
exits {
errorWithCsvFile: {
responseType: 'badRequest'
}
}
const csv = await sails.helpers.files.convertToCsv(data)
.intercept(‘somethingWrongCode’, ‘errorWithCsvFile’)
... // Other handles
.intercept(err => new Error(err))
Alternative:
try {
...
const csv = await sails.helpers.files.convertToCsv(data)
.intercept((err) => {
sails.log.error(err)
req.addFlash('error_messages', 'Error parsing data to csv!')
throw 'badRequest';
})
...
} catch (err) {
sails.log.err(err);
return res.redirect(`/`);
}