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How to Migrate from Paperclip to Rails ActiveStorage Discussion

Discussion for How to Migrate from Paperclip to Rails ActiveStorage

Abhinay kumar May 11, 2018 5:22am

This should return the path to file in this format: /users/avatar/xxx/xx/original/filename

instance.send(attachment).path

Also, in my case i had to use something like:

file_path = k.send(value).path.split('/system', 2).second

because it exists locally and path had system as a prefix.

Joel Schneider May 17, 2018 2:21pm

For Digital Ocean Spaces, could you check the ETag of an object for the checksum rather than downloading the entire thing? Their docs say the ETag is "an MD5 hash of the object".

Nick Noble May 31, 2018 2:05am

When I run the migration (with the provided code) I get:

ArgumentError: wrong number of arguments (given 1, expected 2..3)

/Users/nicknoble/products/Lnky/db/migrate/20180531013954_convert_to_active_storage.rb:14:in prepare'

/Users/nicknoble/products/Lnky/db/migrate/20180531013954_convert_to_active_storage.rb:14:inup'

Juan Manuel Ramallo June 7, 2018 11:32pm

Same here! :/

Maurício Júnior October 31, 2018 2:47am

Same here :(

Per Lilja September 5, 2019 11:35am

I fixed this by changing to:

active_storage_blob_statement = ActiveRecord::Base.connection.raw_connection.prepare(<<-SQL)
      INSERT INTO active_storage_blobs (
        `key`, filename, content_type, metadata, byte_size, checksum, created_at
      ) VALUES (?, ?, ?, '{}', ?, ?, ?)
    SQL

    active_storage_attachment_statement = ActiveRecord::Base.connection.raw_connection.prepare(<<-SQL)
      INSERT INTO active_storage_attachments (
        name, record_type, record_id, blob_id, created_at
      ) VALUES (?, ?, ?, #{get_blob_id}, ?)
    SQL

Cristian Georgescu May 31, 2018 8:58am

When running migration:

ArgumentError: You tried to define an enum named "industry" on the model "Company", but this will generate a instance method "horeca?", which is already defined by another enum.

Juan Manuel Ramallo June 7, 2018 11:34pm

I think this is because of the first line, when we require all the models. I just commented that line out and worked without that kind of error.

Nick Noble June 13, 2018 1:22am

When can we actually remove paperclip?

Chris Seelus July 20, 2018 2:03pm

No (offical) way to use validations (https://github.com/thoughtbot/paperclip#validations) for Active Storage yet. Mayor bummer …

Tabish Iqbal February 7, 2019 7:01am

Heres a fix for it: https://github.com/igorkasyanchuk/active_storage_validations

Colleen Schnettler October 16, 2018 6:14pm

Instead of building the URL in the def key method, can't I use the same thing I used in checksum?
url = attachment.url
I'm attempting to modify this migration to transition from Shrine to Active Storage.

Colleen Schnettler October 18, 2018 3:15pm

get_blob_id = LASTVAL() was returning the id from the attachments table, NOT the blob_id. I had to change it to get_blob_id = "(SELECT max(id) from active_storage_blobs)". Any thoughts on this?

Francisco Quinones April 13, 2021 6:27pm

Quick question before starting this process. How can you approach this for multi tenant app with apartment gem? Has you use different DBs for the tables. Thank in advance.

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