Clear field value from Anguilla framework

Question

It looks like something pretty easy, but I can't find how to do this.
I need to clear value for some field via javascript. It could be regular text , component link , keyword or dropdown field type. I have following code:

var field = $display.getView().properties.controls.fieldBuilder.getField("some_field");
field.clear();// I need somesting like this

Is it possible to do this in elegant way or I have to look into DOM and clear it manually separately for each field type?

Answer 1

I had quick look in the code for the component dialog and found the following snippet that should help you resolve your problem:

Tridion.FieldBuilder.FieldTypeHandlers.MultiLineTextField.prototype.setValues = function MultiLineTextField$setValues(values)
{
    var changed = false;
    if (values && this.properties.input)
    {
        if (values.length > 1)
        {
            throw Error("This field allows a single value only.");
        }
        else if (values.length == 1)
        {
            var value = values[0];
            if (this.properties.input.value != value)
            {
                changed = true;
                this.properties.input.value = value;
            }
        }
        else if (this.properties.input.value.length > 0)
        {
            changed = true;
            this.properties.input.value = "";
        }
    }
    if (changed)
    {
        this.fireChange();
    }
};

I'm assuming for other field types such as SingleLineTextField the setting/clearing of the value is the same, or if there are differences it wouldn't be too much work to write a generic function to clear your value based on the field type.

Answer 2

OK. So, I post my final method appereance:

var clear = function(field) {
    if (field.getTypeName() == "Tridion.FieldBuilder.FieldTypeHandlers.EmbeddedSchemaField") {
        var fieldDefinitions = field.properties.input.properties.fieldsDefinition.children;
        $.each(fieldDefinitions, function(i, fieldDefinition) {
            var fieldName = fieldDefinition.firstChild.firstChild.data;
            var currField = field.getField(fieldName);
            clear(currField);
        });
    } else {
        if (field.getTypeName() == "Tridion.FieldBuilder.FieldTypeHandlers.KeywordField")
            field.getInputControl().settings = {};
        field.setValues([]);
    }
};

Unfortunately, I didn't find more elegant way to get all fields from embeddable field (field.getInputControl().getFields() doesn't work and always returns empty array). Anyway above function works for me perfectly