Paperclip multiple files rails

Our use cases were a little bit different, though. I decided to use the Paperclip gem to manage the file processing and storage. Paperclip, as its name suggests, is a file attachment library for ActiveRecord.

It is designed to treat files much like other attributes, and it provides a whole slew of built-in extensions e. The setup is very simple, and getting the basics up and running takes only a few minutes. For the sake of this example, we will set up the ActiveRecord model, create a migration, and get rolling with the Active Admin file upload. If you have an existing model where you want to add Paperclip support, then you simply need to create a migration. In this case, I already had a table and a corresponding model for my firmware image, so I just needed to add a migration to add the columns that Paperclip requires.

The easiest way to do this is with the Rails migration generator:. The true beauty of Paperclip is how well it integrates with ActiveModel. To add Paperclip support to your model, start by adding the following line to your model class:. For our purposes, the defaults should be just fine.

Paperclip also makes it really easy to perform powerful validations on the file. If any validation fails, the file will not be saved to disk and the associon will be rolled back, just like any other ActiveRecord validation. There are built-in helpers to validate attachment presence, size, content type, and file name. In our case, we really just need to validate the file name to ensure that it had the proper format and also that it was a unique file name.

Large files uploads in single-threaded, non-evented environments such as Rails block your application's web dynos and can cause request timeouts and H11, H12 errors.

For files larger than 4mb the direct upload method should be used instead. Image display. Files that have been uploaded with Paperclip are stored in S3. You'll have to use something beyond Rails built-in form handling if you want multiple-file upload. And get them to upload. It looks like you're trying to build an "asset" as if it's a Rails association. If you want to attach 5 files, you would need to do something like:.

That way, you could have multiple assets attached to one listing you didn't say what the original object was so I just called it "listing". You'll have to use something beyond Rails built-in form handling if you want multiple-file upload. Uploadify is a decent choice that I've used before.

However, I cannot vouch for how good it is. My advice would be to start step-by-step. Uploading via Flash to Rails can be a complicated process that involves dealing with the CSRF meta-tag and other fields in your form. Start by making a form that allows a user to upload one file and stores it through Paperclip. Then try adding Uploadify or another alternative. When you try calling listing. There is an asset. You need to create a separate model yourself and use Rails' associations if you want multiple files.

This is assuming you're already able to upload one image but want to upgrade to multiple images at once. Notice that wait time will increase. To help reduce wait time, peep my post on this question related to speed uploading. Here is a full example of multiple file uploads.

Each upload model has an avatar which represents the file attachment. Ultimately: we are creating many uploads when we create the user. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams?