Rails Zip Multiple Files For Download
Ellen Woolcock
I am using the gem nested_form_fields and paperclip in my app. Through the above code, I am able to upload multiple files. But my concern is how do I upload multiple files with a single file_uploader. I used name file[] and :multiple=>true, still its not working. Please help me out.
rails zip multiple files for download
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Note that we need to add the multiple:true statement for upload field that can add many files. With both our blog post header image upload field as well as our multiple files upload field, the complete form code would look like:
To view our uploaded files, we need to access them on the Posts show page. In its simplest form, we can simply link to the file by iterating through the files and linking to them. This would be for our many files upload:
For our many attached files, we may want to delete one or even several of them at some point. Because deleting Active Storage attachments falls outside the default conventions for RESTful actions in Rails, we need to add both a new action to the posts controller as well as a new route to the routes.rb file.
In this tutorial, we have been able to generate a full set of CRUD actions for Active Storage attachments in a simple Rails app for both single and multiple file uploads. Uploads can get quite a bit more complex in terms of how you want to display different kinds of files in the browser and whether or not you want to add drag and drop uploading. But the functionality in this post covers most simple use cases.
If you have a larger Rails project, or a project with many resources, managing one database seed file can get out of hand. In the name of DRY-ing out code, this article walks you through how to abstract your seed data into multiple files.
So, the approach is to create a new directory: db/seeds, and had multiple seed files in this location. I think the best approach would be to separate your concerns in your seed files (i.e. books, posts, recipe, users etc). Create multiple seed files to manage easier each resource and place them in this new directory.
When you execute rails db:migrate, Rails will only run the file: db/seeds.rb. To fix this, we will use Ruby to parse the new directory for files. So, in the default db/seeds.rb file add the following:
Railsroutes file can become lengthy if the application becomes huge. It can be difficult to manage routes especially if we have multiple namespace and route action names are similar across namespaces. Splitting Rails routes helps us manage routes easily in an application.
If you work on a large Ruby on Rails application with a lot of routes in the config/routes.rb file, you can now easily split that into multiple files. Rails 6.1 brought back the feature that allows you to load external route files from the router.
I'd like Users to have the abililty to download a Projects datafiles as a single zip file. Im trying to figure out the best strategy to implement this feature. Here are the ideas I've come up with so far:
It'll be super interesting to see, but the nice part is that as long as you store metadata for all the files in your database, you can get a quick detail of the average file size, largest file, and so on to help you analyze which will be the best approach.
Honestly not 100% sure what my usage case will be just yet, though I estimate that it'll be mostly small files (pdfs, sketchup files, CAD/CAM files, images, etc.). So I think I may be in the realm of best being the enemy of good enough. With that in mind, I'll likely stick with option 1 for now, and then proceed to monitor performance and make adjustments as needed.
Just to close the loop on this, I'm using the zipline gem to stream dynamically generated zip files to the user. Files uploaded directly to s3 via shrine. The downloads controller either spits out a zip if a project has multiple attachments, or serves up a single file otherwise. Seems to be working well so far.
Yes, mostly small files at the moment. At some point it probably make sense to have a background job create a zipped version and store that on S3, but that extra bit of complexity is on the back burner for now.
Hi all, I've started to make a Rails app with multiple audio files that can be streamed and downloaded by users. So far I've implemented Shrine so that I can upload files to my cloud storage (digitaloceans spaces). At the moment I have a Sample model and I just use a form to add new samples one by one. This works okay but if I have multiple samples that I'd like to add it could be very time consuming to create them one at a time.
There was no built in supportfor multiple environment credentials before Rails 6.We could manage credentials for different environments but it was upto us to explicitly specify which set of credentials to use for a specific environment.
Another way to manage environment specific credentialswas by creating environment specific files.For example, we can create config/staging.yml.enc for staging environmentand config/production.yml.enc for production environment.To read config from these files, Rails 5.2 providedencrypted method to support for managing multiple credentials files.
The changes added in the above PR are backwards compatible.If environment specific credentials are not presentthen rails will use the global credentialsand master keywhich are represented by following files:
To allow multiple file uploading, we use the jQuery File Upload plugin, created by Sebastian Tschan. This plugin has numerous options and cool features. I encourage you to check out its documentation.
We are checking if each file has the correct format. If it does, submit the form using data.submit();, otherwise, present the user with an error message. Now, the user will know if the files are the an acceptable format.
Note that I run once again the code in a new process. This is mainly because I want to take advantage of the multiple cores on my machine. Of course this will result in my computer to really slow down, as running a hundred rails processes and bundler installation is very memory heavy, but from my experience it always turns out to be faster - at least on my computer. Using exec is nice here as it completely replace the ruby process by the shell script.
Within the block of member routes, each route name specifies the HTTP verb thatwill be recognized. You can use get, patch, put, post, or delete here. If you don't have multiple member routes, you can also pass :on to aroute, eliminating the block:
Having multiple routing files makes discoverability and understandability harder. For most applications - even those with a few hundred routes - it's easier for developers to have a single routing file. The Rails routing DSL already offers a way to break routes in an organized manner with namespace and scope.
To get a complete list of the available routes in your application, visit :3000/rails/info/routes in your browser while your server is running in the development environment. You can also execute the bin/rails routes command in your terminal to produce the same output.
Yesterday I spent a few hours working on adding multiple file upload capabilities to the administrative panel of a website I am working on. The administrative panel of the website is built using RailsAdmin. RailsAdmin is a Rails engine that provides an easy-to-use interface for managing your data.
I needed the upload functionality for the Gallery section of the website. Each photo gallery has many photos and the website owner should be able to upload with ease multiple photos for each gallery. The ideal solution for this use case is to have a file upload field that accepts multiple files, so that the administrator could select a number of pictures from their computer and upload with a single click.
The last bit is to add the custom action to the member actions of the Album model. We only want to have the multiple upload button for the Album model, therefore we add the only directive. This we do at the RailsAdmin initialiser: config/initialisers/rails_admin.rb
Active Storage facilitates uploading files to a cloud storage service likeAmazon S3, Google Cloud Storage, or Microsoft Azure Storage and attaching thosefiles to Active Record objects. It comes with a local disk-based service fordevelopment and testing and supports mirroring files to subordinate services forbackups and migrations.
Compared to libvips, ImageMagick is better known and more widely available. However, libvips can be up to 10x faster and consume 1/10 the memory. For JPEG files, this can be further improved by replacing libjpeg-dev with libjpeg-turbo-dev, which is 2-7x faster.
Configuration files that are environment-specific will take precedence:in production, for example, the config/storage/production.yml file (if existent)will take precedence over the config/storage.yml file.
If you want to use environment variables, standard SDK configuration files, profiles,IAM instance profiles or task roles, you can omit the access_key_id, secret_access_key,and region keys in the example above. The S3 Service supports all of theauthentication options described in the AWS SDK documentation.
A mirror service is intended to be used temporarily during a migration betweenservices in production. You can start mirroring to a new service, copypre-existing files from the old service to the new, then go all-in on the newservice.
Mirroring is not atomic. It is possible for an upload to succeed on theprimary service and fail on any of the subordinate services. Before goingall-in on a new service, verify that all files have been copied.
Mirror services are compatible with direct uploads. New files are directlyuploaded to the primary service. When a directly-uploaded file is attached to arecord, a background job is enqueued to copy it to the secondary services.
All Active Storage controllers are publicly accessible by default. Thegenerated URLs are hard to guess, but permanent by design. If your filesrequire a higher level of protection consider implementingAuthenticated Controllers.
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