maybe(Bool) support

[berndca]

Thanks for the great library! I'm working on an editor to author documents compliant with IEEE 1685-2014 (IPXACT). This means I have to work with an existing schema. This schema contains conditional Boolean elements, e.g. an element named "volatile". The value of this element is either undefined, true or false. The undefined value can be interpreted as false only if the volatile elements in all child elements are undefined as well. Long story short. There is an actual use case for conditional Boolean fields.

Are you planning to support this in the future? What would be a good workaround right now?

I tried using an Enum, rendered it as radio (so far so good) and tried to use a Transformer to convert betweeen Str and Bool. However I could not get the Transformer to work - I suspect it might only work with 'Textbox'?

Please advise. Thanks, Bernd

[gcanti]

I just made a commit on master branch adding transformers to all components.

In your case something like this should work:

var MyModel = t.struct({
  mybool: t.maybe(t.Bool)
});

var options = {
  fields: {
    mybool: {
      factory: t.form.Select, // render as a select since null is a valid value
      options: [
        {value: '0', text: 'No'},
        {value: '1', text: 'Yes'}
      ],
      transformer: {
        format: function (value) {
          return value === false ? '0' : value === true ? '1' : value;
        },
        parse: function (value) {
          return value === '0' ? false : value === '1' ? true : null;
        }
      }
    }
  }
};

var App = React.createClass({

  save: function () {
    var value = this.refs.form.getValue();
    if (value) {
      console.log(value);
    }
  },

  render: function() {
    return (
      <div>
        <Form ref="form"
          type={MyModel}
          options={options}
        />
        <button className="btn btn-primary" onClick={this.save}>Save</button>
      </div>
    );
  }

});

[gcanti]

Let me know if it's ok

[berndca]

Thanks for the quick response. I switched to version 0.4.8 and tried it out. Works well!

Thanks, Bernd

[gcanti]

Great, thanks for the feedback

Giulio