Question: Validate against sub-schema?

[cdaringe]

Hello:

I have a schema, but when my user is using a form, I want to validate onkeypress only the particular field they've modified, using the overarching schema that the form already composes.

// purely hypothetical, but 
var schema = { a: joi.string(), b: joi.string() };
onkeypress = function(evt) {
    joi.validate(evt.target.value, schema.a); // where i could extract a's schema rules only
}

is such a feature available?

[cdaringe]

i did end up var childSchemasByName = _.indexBy(schema._inner.children, 'key');, but that's probably taboo :/

[Marsup]

You can also see it the other way, your schema is composed of many sub-schemas, why not compose them afterwards.

[cdaringe]

thanks for the great tip, @Marsup. unfortunately, I don't directly own the code i'm pulling from. for now, what I've done does the trick. perhaps joi would be open to a joi.subschema(schema, 'path.to.subschema'), which would wrap that which I proposed above?

[lock]

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