Using custom keywords?

[firasdib]

AJV has support to add custom keywords, but I don't see any way of using these with fluent schema.

AJV will accept this:

{
  foo: {
    type: 'integer'
  },
  myKeyword: true,
}

but I have no idea how to do something like this in fluent-schema, if its even possible.

[aboutlo]

fluent-schema doesn't support custom AJV keywords. we had a similar discussion here: #16

To be fair, I'm not sure if it's a good idea to add not standard keywords related to a specific validator (e.g. AJV).

Regardless can you give an example of API that would you like to use

[firasdib]

@aboutlo Okay. I wanted to add a specific type/keyword to be able to manipulate the data to my needs in a generic way.

[aboutlo]

maybe we could think something like that.

S.object()
  .prop('foo', S.integer())
  .prop('myKeyword', S.raw({true})

//cc @mcollina @Eomm

[Eomm]

Is S.raw a type or could be attached like prop?

S.object()
  .prop('foo', S.integer())
  .prop('myKeyword', S.raw('true')
  .raw({$def:S.object().valueOf()})

And the input could be:

• a json => an will be that will be spread
• a string/bool/num => and will be used as value
  ?

[aboutlo]

I imagined as a type in order to accept an arbitrary valid JSON.
In your example I don't get the benefit. it could be S.definition(S.raw({ foo: 'bar'}))

[firasdib]

Unless I've missed something, adding support for this would allow us to use the nullable feature in AJV/OpenAPI, which I currently don't think is possible with fluent schema.

[aboutlo]

Yes, any feature outside JSON Schema spec isn't currently supported

[aboutlo]

Moved the conversation here: #55