After upgrade to latest version(2) from 1.0.0 failed to add doc

[ghost]

this.index = lunr(function(){
        this.field('title', { boost: 10 });
        this.field('content');
 `});

this.index.add(doc); //failed with "this.index.add is not a function"

[et1421]

Seems like this feature is no longer available : https://lunrjs.com/guides/upgrading.html

[ghost]

got it. Thank you very much.