Getting AWS::S3::S3Object from object id

[L]

I am trying to use the S3Object.url_for method to email the uploaded link to users. Giver an object id e.g. image.id, how can one get the S3Object instance of that object? 

I spent over 3 hours fiddling with the Shrine.storages[:store].bucket and  Shrine.storages[:store].bucket(id) without much success as for some strange reason the returned object of bucket.object would always be S3ObjectSummary instead of S3Object. Any help would be greatly appreciated.

[Janko Marohnić]

Just to verify, Shrine::Storage::S3 uses aws-sdk v2, so it's not `S3Object` anymore but `Aws::S3::Object`. Also the aws-sdk v2 doesn't have `#url_for` method, it only has `#presigned_url` and `#public_url`.

If you pull in Shrine from the master branch, the Shrine::Storage::S3#object which was "protected" before is now public, so you can call it on `image.storage` (it's simpler than `Shrine.storages[:store]`):

  image.storage #=> #<Shrine::Storage::S3:...>

  image.storage.object(image.id)

If you don't want to pull Shrine from master, you can access the Aws::S3::Object through the bucket directly. Then you just have the add the S3 prefix if you're using it in your storage:

  image.storage.bucket.object([*image.storage.prefix, image.id].join("/"))

However, considering that `image.url` will call `#presigned_url` by default, and `#public_url` if you call `image.url(public: true)`, and you can pass any additional options which will be forwarded to those methods, you shouldn't ever have to use `Aws::S3::Object` directly for generating URLs.

Btw, aws-sdk v2 also has `Aws::S3::ObjectSummary`, but when I call `image.storage.bucket.object(...)` I get a `Aws::S3::Object` back, so I cannot reproduce the behaviour you're experiencing. I don't know what does aws-sdk use `Aws::S3::ObjectSummary` for, but it seems to have the same methods as `Aws::S3::Object`.

Kind regards,

Janko

On Sat, Mar 4, 2017 at 1:01 PM, L <hitech...@gmail.com> wrote:

I am trying to use the S3Object.url_for method to email the uploaded link to users. Giver an object id e.g. image.id, how can one get the S3Object instance of that object? 

I spent over 3 hours fiddling with the Shrine.storages[:store].bucket and  Shrine.storages[:store].bucket(id) without much success as for some strange reason the returned object of bucket.object would always be S3ObjectSummary instead of S3Object. Any help would be greatly appreciated.

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