Function dataFactoryFor

dataFactoryFor(defaultObject)

Returns a new factory function that returns can be called to obtain a copy of defaultObject. Optionally, the factory function can be passed a partialObject in which case it will return a copy of the merged object.

Any properties appearing in partialObject must be complete objects. If you want to update a deeply nested property by itself, you can do so by directly modifying the object. This is safe because

This can still be a bit awkward since there may be a number of optionals that you have to check before setting the value.

Example (shallow override):

    const BASE_OBJECT = {
        student: { ... },
        teacher: { ... },
    };
    const dataFactory = dataFactoryFor(BASE_OBJECT);
    const data = dataFactory({
        student: {
            __typename: "User",
            id: "new_kaid",
            kaid: "new_kaid",
            ... other properties on `user`
        }
    });
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Example (deep update):

    const BASE_OBJECT = {
        student: { ... },
        teacher: { ... },
    };
    const dataFactory = dataFactoryFor(BASE_OBJECT);
    const data = dataFactory();
    if (data.user) {
        data.user.kaid = "new_kaid";
        data.user.id = "new_kaid";
    }
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