22 lines
442 B
Ruby
22 lines
442 B
Ruby
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class Attachment < ApplicationRecord
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belongs_to :attachable, polymorphic: true
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has_attached_file :file,
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styles: lambda { |a|
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a.instance.is_image? ? {
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small: 'x200>',
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medium: 'x300>',
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large: 'x400>'
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} : {}
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}
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validates_attachment_content_type :file, :content_type => [
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/\Aimage\/.*\Z/,
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/\Avideo\/.*\Z/
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]
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def is_image?
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file.instance.file_content_type =~ %r(image)
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end
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end
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