We will start off by adding the Amplify Storage category to our project. In this article, we will be adding Amplify Storage to upload and retrieve images from AWS in just a few steps. With our application in place, it is now time to start adding more functionality using some of the other Amplify categories. 7 The Amplify Series, Part 7: Track app usage with Amplify Analytics.6 The Amplify Series, Part 6: Using the power of AI and Machine Learning with Amplify Predictions.5 The Amplify Series, Part 5: Uploading and retrieving images with Amplify Storage.4 The Amplify Series, Part 4: Developing and deploying a cloud-native application with AWS Amplify.3 The Amplify Series, Part 3: Why should you use AWS Amplify?.2 The Amplify Series, Part 2: How does AWS Amplify work?.1 The Amplify Series, Part 1: What is AWS Amplify?. ![]() From the AWS docs on creating new objects.Cloud The Amplify Series, Part 5: Uploading and retrieving images with Amplify Storage To do that we need to set success_action_status to 201. Here we are going to configure AWS and create a global S3 constant: ( directive, we will rely on AWS telling us the name of the key that the file is stored in. Create an initializer in config/initializers/aws.rb. Once you’ve got your environment variables set up locally you’ll need to instantiate a new S3 object to use in the controller. $ heroku local:run rails runner "puts ENV" ![]() Make sure the values are being written into your environment by running this command and ensuring it matches the value in your. envĪWS_SECRET_ACCESS_KEY=exampleBARZHS3sRew8xw5hiGLfroD/b21p2l env file and ensure that you have set an S3_BUCKET, AWS_ACCESS_KEY_ID, and AWS_SECRET_ACCESS_KEY to the values from when you created an S3 bucket. For local development we will assume you are using a. In your application’s Gemfile add: gem 'aws-sdk', '~> 2' We will be using the Amazon Ruby SDK for interacting with S3. Now that you’ve got a Rails app and an S3 account you will need to interact with the files on the client side and you’ll need a library for interacting with S3 on the Ruby side. Please follow the directions for getting an S3 account before continuing. You will now need to enable your application to communicate with S3 S3īefore we can send a file to S3 you will need an S3 account and appropriately configured bucket. Now open the project in your editor of choice. Now you can migrate your database: $ rake db:migrate $ rails generate scaffold user name avatar_urlĬreate db/migrate/20140519195131_create_users.rb You can follow along from scratch if you do not yet have a project: $ rails new direct-s3-example This also assumes that you’ve got a UsersController. Example appįor the purpose of this example, we will assume you have a User model and that you want to store an avatar for each user on S3. On the Rails side create an AWS presigned-post and store the image URL in the database. ![]() The UI behavior is very customizable, and the behavior from a user perspective is very simple. There are other libraries such as carrier wave direct that may also be able to enable you to upload your images directly to S3, however without the low level knowledge of all the client side considerations implementing them can be difficult.īy using the jQuery-File-Upload plugin we will create a relatively readable and short JavaScript code that can be re-used on any form using an image upload input. This article uses the jQuery-File-Upload plugin and the AWS gem. This article shows how to accomplish this. ![]() The only downside is that all the logic must be performed on the client side. This way it does not matter if our dyno is restarted while the image is uploaded, your dyno does not need to handle the extra load of image uploads, and you don’t have to wait for the file to upload twice, once to your dyno and once to S3. While this works well for small files, larger files may be deleted from the dyno before they can be uploaded to S3 due to Heroku’s ephemeral filesystem.Ī more stable alternative is to upload the image to S3 directly from the client side, and when the image is fully uploaded save the reference URL in the database. They typically upload the file to Heroku and then stream it to S3. While there are many popular S3 image upload solutions for Ruby and Rails such as Paperclip and CarrierWave, these solutions use the server as a temporary cache. This article demonstrates how to add direct S3 uploads to a Rails app. This article has not been updated to reflect the latest changes in libraries and may no longer work.
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