Default value in form format

[nicklasb]

I know that it is possible to have default values in the JSON Schema, however, that is not always sufficient:

1. When you "inherit" parts of schemas($ref) into another, you sometimes want to add or change defaults, especially when there are multiple choices.
2. In the UI, there are certainly cases where the defaults are more dynamic.

I am thinking that perhaps this pushes it beyond "good to have" and into "commonly usable".

Or should this be better handled in some other way? Defaults is a little tricky when it comes to where they belong.

[Anthropic]

I think we need to go even further, when I change field group based on a condition I need to define if it resets to a default for the condition. I think it needs to be a part of a rule definition.

[nicklasb]

Ok, then. I hear you about the rules.
But a set of data is a more complex result of a rule than a true/false value.
Becomes more "script" than rule then.

[Anthropic]

Well the rule would be like a bunch of switches determining what the result was, it could be a simple value or an object with schema definition to merge into parent. I think it can behave as script without being script as we need it to work in all languages and be super easy to implement and understand.

[iseessel]

@Anthropic I think this would be commonly usable.

[Anthropic]

@iseessel it is something I want to add, just takes time I don't have much of.

[iseessel]

@Anthropic No worries -- I'll see if I can make a PR for it -- but that would be doubtful as well.

[Anthropic]

@iseessel I am actively working with the other members of json-schema on a ui-schema to better define behaviours but no one ever seems to have enough time, including myself. I'm trying to get work to give me some time but no luck yet.

[jousepo]

Here it is a little workaround for this:

function mapDefaults(model, formObj) {
    if (!model) {
        model = {};
    }

    if (angular.isArray(formObj)) {
        angular.forEach(formObj, function(item) {
            model = mapDefaults(model, item);
        });
    } else {
        if (formObj.items) {
            model = mapDefaults(model, formObj.items);
        }

        if (formObj.tabs) {
            model =  mapDefaults(model, formObj.tabs);
        }

        if (formObj.key && !angular.isUndefined(formObj.default)) {
            model[formObj.key] = formObj.default;
        }
    }

    return model;
}

var yourModel = mapDefaults({}, yourForm);