Resize images before uploading them with Ruby on Rails Active Storage

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Imagemagick activestorage Ruby Validations minimagick

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  • image_processing

    High-level image processing wrapper for libvips and ImageMagick/GraphicsMagick

    Ruby on Rails 7 uses the image_processing gem to resize images, so either uncomment image_processingfrom you Gemfile, or add it if it is not already present.

  • active_storage_validations

    Do it like => validates :photos, attached: true, content_type: ['image/png', 'image/jpg', 'image/jpeg'], size: { less_than: 500.kilobytes }, limit: { min: 1, max: 3 }, aspect_ratio: :landscape, dimension: { width: { in: 800..1600 }

    I recommend pairing this approach with the active_storage_validations gem and adding a validation to the attachment field to ensure that the attachment that you'd like to resize is an image. Ideally, an application should gracefully handle invalid input with useful error messages.

  • WorkOS

    The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

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