support `Object.keys` within `oneOf`

[chrisdrackett]

I'd like to use Object.keys to generate the list of values possible for oneOf but have found that this currently does not work. Has anyone run into this before? Not sure if this is a feature request or if there is a better way I could be writing my propType.

[fkling]

Can you give a concrete example and the result you expect? We could certainly special case Object.keys, but only if the passed value can also be statically resolved to an object literal.

[chrisdrackett]

sure, this is what I'm doing:

In an external file that is shared by a couple components:

const status = {
  info: {
    color: 'gray',
    icon: 'info',
  },
  normal: {
    color: 'green',
    icon: 'check',
  },
  warning: {
    color: 'orange',
    icon: 'warning',
  },
  error: {
    color: 'red',
    icon: 'x',
  },
}

const statusValues = Object.keys(status)

In a component that accepts one of the statuses listed above:

status: PropTypes.oneOf(statusValues)

I'm looking for the list ['info', 'normal', 'warning', 'error']

[fkling]

react-docgen doesn't analyze code across files... however, depending on what exactly you are doing with react-docgen, you could get the list of keys in a different way (e.g. by actually loading that file) and insert the values into the documentation object that react-docgen produces.

[chrisdrackett]

ok, I'm using react-styleguidist which uses docgen. I'll see if I can figure out another method (or just write them by hand again)

[chrisdrackett]

also, of note, I did just try and do this with an object in the same file and I still get this output. So while this might not ever work for an object from an external file it might still be nice for something within the same file.

[fkling]

Yeah, that's what I meant when I said that we could special case Object.keys(<resolves to object literal>) being passed to .oneOf.

[chrisdrackett]

ah, right, I have the memory of a goldfish. carry on!

[motleydev]

I would like this as well. Seems that variables should be evaluated before the docs get "scraped" from the file.

[MaxInMoon]

+1

[dmitry-zaets]

Related to #122