We currently switched to Rails 5.2 to get the awesome functionalities of
ActiveStorage.
Up until now I was able to upload, delete (purge), and show files as
expected - but I am not quite sure on *how to update an attachment the
right way*.
Here are the steps to reproduce:
user.avatar.attached?
=> false
user.avatar.attach(io: File.open("~/avatar.png"), content_type:
"image/png", filename: "avatar")
=> #<ActiveStorage::Attachment id: 2, name: "avatar", record_type: "User",
...
user.avatar.attached?
=> true
user.avatar.attach(io: File.open("~/avatar2.png"), content_type:
"image/png", filename: "avatar2")
=> *Exception: ActiveRecord::RecordNotSaved: Failed to remove the existing
associated avatar_attachment. The record failed to save after its foreign
key was set to nil.*
user.avatar.purge
=> nil
user.avatar.attached?
=> false
user.avatar.attach(io: File.open("~/avatar2.png"), content_type:
"image/png", filename: "avatar2")
=> #<ActiveStorage::Attachment id: 2, name: "avatar2", record_type: "User",
...
I don't think it should be necessary to purge the first attachment to
attach a new one. So how can this be achieved properly?
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