.tolerate()
Tolerate (swallow) the specified error, and return a new result value (or undefined) instead. (Don't throw.)
.tolerate(filter, handler)
Or:
.tolerate(filter).tolerate(handler)(to tolerate all errors)
Usage
| Argument | Type | Details | |
|---|---|---|---|
| 1 | filter | The code of the error that you want to intercept, or a dictionary of criteria for identifying the error to intercept. | |
| 2 | handler | An optional procedural parameter, called automatically by Sails if the anticipated error is thrown. It receives the argument specified in the "Handler" usage table below. If specified, the handler should return a value that will be used as the result. If omitted, the anticipated error will be swallowed and the result of the query will be undefined. |
Handler
| Argument | Type | Details | |
|---|---|---|---|
| 1 | err | Your anticipated Error. |
.tolerate()is useful for tolerating a kind of error (or all errors). If you chain on.tolerate()and it matches the error that occurs, then the underlying logic won't throw. Instead, it returns the return value of the handler function you passed into .tolerate().
Example
Say you're building an address book that doesn't allow records with duplicate email addresses. To instead swallow the error caused by entering a non-unique email address and update the existing contact:
let newOrExistingContact = await Contact.create({
emailAddress,
fullName
})
.fetch()
.tolerate('E_UNIQUE');
if(!newOrExistingContact) {
newOrExistingContact = await Contact.updateOne({ emailAddress })
.set({ fullName })
.fetch();
}
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Reference
- Application
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Configuration
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