Improvement: Display detailed messages when validation fails

^{Originally posted by **AM1988** October 4, 2024}
Hi there.

I have a class for data validation
`export class SchemaValidator {
static ajv = new Ajv({ allErrors: true, verbose: true });

public static validate(schema: SchemaFile, data: T): boolean {
const schemaContent = JSON.parse(fs.readFileSync(path.join(__dirname, 'path', schema), 'utf-8'));
if (!this.ajv.validateSchema(schemaContent)) {
console.error(`Schema is not valid.`);
}
const isValid = this.ajv.validate(schemaContent, data);

if (!isValid) {
const errorMessages = this.ajv.errorsText();
logger.error(`Validation failed : ${errorMessages}`);
return false;
}
return true;
}
}`
I use JSON schema described in a separate file.
How to get the full output when validation fails so that I can understand which part exactly does not match?

For example, values in the enum did not match, or input data had some additional properties, missing properties, etc.

Right now I see only `data.payload.something should be equal to one of the allowed values`