Added unique validator that checks for duplicate image uploads
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@ -12,6 +12,15 @@ class Screenshot < ActiveRecord::Base
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url: '/screenshots/:id_partition/:style.png'
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validates_attachment_content_type :image, :content_type => 'image/png'
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validates_with AttachmentSizeValidator, :attributes => :image, :less_than => 5.megabytes
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validate :validate_image_is_unique
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# Validator that checks if the image has already been uploaded
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def validate_image_is_unique
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# Look for images with the same checksum / image_fingerprint
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if Screenshot.find_by(image_fingerprint: image_fingerprint)
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errors.add(:image, "has already been uploaded")
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end
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end
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# Return caption for full-screen screenshots.
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# Takes the description of a screenshot if available.
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