Please see #4205 for a rationale of this change. My thoughts that led to this PR are in the bottom comment.
I have asked myself whether this should be documented at all, given that it is a rather obscure corner case (user sets the model id to a fixed value in the defaults and also adds instances of the model to a collection). However, the fact that #4205 was reported proves that users may encounter the situation.
jgonggrijp
commented
1 year ago
Please see #4205 for a rationale of this change. My thoughts that led to this PR are in the bottom comment.
I have asked myself whether this should be documented at all, given that it is a rather obscure corner case (user sets the model id to a fixed value in the defaults and also adds instances of the model to a collection). However, the fact that #4205 was reported proves that users may encounter the situation.
The edit can be previewed as web page over here: https://cdn.statically.io/gh/jgonggrijp/backbone/document-defaults-idAttribute/index.html#Model-defaults.