Gorm: Auto deletion on One-To-Many update

[castedmo]

I'm not sure if this behavior is intended or not.
Lets say we have User who has many Emails, then on retrieving a user, removing one of his emails, and saving him back, I expected to have that deleted email removed from database as well, which did not.

[jinzhu]

You need to do it like this:

db.Model(&user).Association("Languages").Replace([]Language{languageZH, languageEN})
db.Model(&user).Association("Languages").Replace(Language{Name: "DE"}, languageEN)

refer: https://github.com/jinzhu/gorm#many-to-many

[castedmo]

It only works on many-to-many relations.

[jinzhu]

In other case, you should just delete the Email?

[castedmo]

I can do that, but i was hoping for a more idiomatic way. With your suggestion, I should check related emails, to see if any item was deleted, then delete that email myself.

[jinzhu]

Is this dangerous? if you save the profile without any emails (because you haven't load emails into that profile), then I need to clear all emails for that profile?

So just delete it when you means that.

[jainsangam]

@jinzhu it would really be nice if you can provide similar mechanism ( as of many2many relation ) for handling related entity in one2many relation as well.

[RichardLindhout]

@jinzhu Would you accept a PR for a simular replace function for one-to-many?