JSON Schema - Hackdot

Re:JSON Schema by nathan_f77 on Sunday February 18, 2018 @11:52AM (#16406866)

This is what I'm using for schema validation in FormAPI [1]. The best part about using a standard is that there's a lot of open source libraries you can use. It's really easy to validate a schema in Ruby [2]. I use json-schema-faker [3] to fill out PDFs with test data. I also use AlpacaJS [4] to generate HTML forms based on the JSON schema.

Anyway, I'm really glad I didn't try to roll my own thing for schema validation. Alpaca is insanely powerful, and it would have taken me weeks or months to build the online forms from scratch.

[1] http://formapi.io

[2] https://github.com/ruby-json-schema/json-schema

[3] https://github.com/json-schema-faker/json-schema-faker

[4] http://www.alpacajs.org/

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Re:JSON Schema by tappleby on Sunday February 18, 2018 @01:10PM (#16407262)

We have a similar setup for extending our app with custom fields / forms using ruby-json-schema and react-jsonschema-form [1].

ruby-json-schema has worked out quite well, we added a custom schema reader so that we could generate enums dynamically based on records in the database via custom refs eg. app://schemas/organizations?type_eq=education&tags=one, any of these internal refs are inlined at the API layer.

One issue we did run into with ruby-json-schema, is the schema caching is not thread safe. We opted to clear the cache after each validation, this ended up causing race-condition issues. In the end we had to use a mutex on write and cache the validation result (not ideal, but our app isn't that write heavy).

[1] https://github.com/mozilla-services/react-jsonschema-form

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