@apideck/better-ajv-errors 👮♀️
Human-friendly JSON Schema validation for APIs
- Readable and helpful ajv errors
- API-friendly format
- Suggestions for spelling mistakes
- Minimal footprint: 1.56 kB (gzip + minified)
Install
$ yarn add @apideck/better-ajv-errors
or
$ npm i @apideck/better-ajv-errors
Also make sure that you've installed ajv at version 8 or higher.
Usage
After validating some data with ajv, pass the errors to betterAjvErrors
import Ajv from 'ajv';
import { betterAjvErrors } from '@apideck/better-ajv-errors';
// Without allErrors: true, ajv will only return the first error
const ajv = new Ajv({ allErrors: true });
const valid = ajv.validate(schema, data);
if (!valid) {
const betterErrors = betterAjvErrors({ schema, data, errors: ajv.errors });
}
API
betterAjvErrors
Function that formats ajv validation errors in a human-friendly format.
Parameters
options: BetterAjvErrorsOptions
errors: ErrorObject[] | null | undefined
Your ajv errors, you will find these in the errors
property of your ajv instance (ErrorObject
is a type from the ajv package).
data: Object
The data you passed to ajv to be validated.
schema: JSONSchema
The schema you passed to ajv to validate against.
basePath?: string
An optional base path to prefix paths returned by betterAjvErrors
. For example, in APIs, it could be useful to use '{requestBody}'
or '{queryParemeters}'
as a basePath. This will make it clear to users where exactly the error occurred.
Return Value
ValidationError[]
Array of formatted errors (properties of ValidationError
below)
message: string
Formatted error message
suggestion?: string
Optional suggestion based on provided data and schema
path: string
Object path where the error occurred (example: .foo.bar.0.quz
)
context: { errorType: DefinedError['keyword']; [additionalContext: string]: unknown }
errorType
is error.keyword
proxied from ajv
. errorType
can be used as a key for i18n if needed. There might be additional properties on context, based on the type of error.
Related
- atlassian/better-ajv-errors was the inspiration for this library. Atlassian's library is more focused on CLI errors, this library is focused on developer-friendly API error messages.