Expressions in propTypes not parsed correctly

[mik01aj]

Originally reported in https://github.com/sapegin/react-styleguidist/issues/13#issuecomment-146868948.

I use an expression in React.PropTypes.oneOf(...). This is the output from react-docgen:

{
  "description": "",
  "props": {
    "issue": {
      "type": {
        "name": "object"
      },
      "required": false,
      "description": ""
    },
    "width": {
      "type": {
        "name": "enum",
        "computed": true,
        "value": "_.map(_.keys(coverWidths), _.parseInt)" <------- problem
      },
      "required": false,
      "description": ""
    },
    "style": {
      "type": {
        "name": "object"
      },
      "required": false,
      "description": ""
    }
  }
}

coverWidths is a variable defined in that file. In runtime it's generated correctly, but react-docgen can't parse it.

value in the marked line should be null, and there should be a raw property with it instead.

@fkling confirmed that this is is a bug in react-docgen.

[fkling]

Thinking about it more, I will have to check again if it is really a bug. It might also be that the computed: true field should indicate that value is the source instead of the real value.

But even then, it's probably better to leave value empty and have the source in raw.

[joaomilho]

I have the same problem, although my example is simpler. Given the following code:

export default function Tooltip () { ... }

Tooltip.arrows = ['up', 'down', 'left', ...];

Tooltip.propTypes = {
  arrow: PropTypes.oneOf(Tooltip.arrows)
};

And this generates the following JSON:

{
  arrow:
   { type: { name: 'enum', computed: true, value: 'Tooltip.arrows' },
     required: false,
     description: '' }
}

[joshfarrant]

Any further thoughts on this? I've recently run into the same problem with the following:

const KIND = {
  PRIMARY: 'primary',
  SECONDARY: 'secondary'
};

// ...

static propTypes = {
  kind: PropTypes.oneOf(Object.values(KIND))
};

I'd expect this:

{
  "kind": {
    "type": {
      "name": "enum",
      "value": [{
        "value": "'primary'",
        "computed": false
      }, {
        "value": "'secondary'",
        "computed": false
      }]
    },
    "required": false,
    "description": "",
    "defaultValue": {
      "value": "'primary'",
      "computed": false
    }
  }
}

However I'm getting this:

{
  "kind": {
    "type": {
    "name": "enum",
    "computed": true,
    "value": "Object.values(KIND)"
  },
    "required": false,
    "description": "",
    "defaultValue": {
      "value": "'default'",
      "computed": false
    }
  }
}

Is there a workaround for this, or a fix in the works? If not, I'd be happy to look at submitting a PR to address this, if you could point me in the right direction.

[dmitry-zaets]

related to https://github.com/reactjs/react-docgen/issues/153 and https://github.com/reactjs/react-docgen/pull/122