Express Js 'this' Undefined After Routing With App.get(..)

I have a basic Node JS server which is designed to be used as an API, I've created a log and database module and I've started adding other modules to deal with different request ty

Solution 1:

You need to properly bind the function.

app.get('/v1/group', group.getAll);

only passes the getAll function as a handler, but the function itself has no concept of this. this is decided based on the context that is bound, or based on how the function is called. This blog post is useful for understanding how function context works.

app.get('/v1/group', group.getAll.bind(group));