add

Adds a property to an existing Type.

If there are active instances of the type you want to modify, then an initial_value is required. This value is used only once for applying the value to the existing instances and is not used when new instances are created.

Action

mod_type(type_name, 'add', property_name, property_type, [initial_value])

Arguments

Argument Type Description
type_name str Name of the Type where the property has to be added to.
'add' str Passing this argument will result in an add action.
property_name str Name of the property that has to be added.
property_type str Type definition of the property that has to be added.
initial_value any The default value to set on existing instances of this Type.

Return value

The value nil.

This code shows the return value for the action add:

// Create type `Person`
set_type('Person', {
    name: 'str',
    age: 'int'
});

// Add `hobbies` to type `Person`
mod_type('Person', 'add', 'hobbies', '[str]');

Return value in JSON format

null