no issue
- `isNew` does not work in Ghost, because Ghost does not use auto increment id's
- see https://github.com/bookshelf/bookshelf/issues/1265
- see https://github.com/bookshelf/bookshelf/blob/0.10.3/src/base/model.js#L211
- we only had one occurance, which was anyway redundant
- if you add a user, `hasChanged('password') is true
- if you edit a user and the password has changed, `hasChanged('password')` is true as well
NOTE #1:
1. We can't override `isNew` and throw an error, because bookshelf makes use of `isNew` as well, but it's a fallback if `options.method` is not set.
2. It's hard to re-implement `isNew` based on `options.method`, because then we need to ensure that this value is always set (requires a couple of changes)
NOTE #2:
If we need to differentiate if a model is new or edited, we should manually check for `options.method === insert`.
NOTE #3:
The unit tests are much faster compared to the model integration tests.
I did a comparision with the same test assertion:
- unit test takes 70ms
- integration test takes 190ms
355ef54702