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class Sponsor < ActiveRecord::Base
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attr_accessible :name, :description, :website_url, :logo, :sponsorship_level_id, :conference_id
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belongs_to :sponsorship_level
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belongs_to :conference
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has_attached_file :logo,
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styles: { thumb: '100x100>', large: '300x300>' }
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validates_attachment_content_type :logo,
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content_type: [/jpg/, /jpeg/, /png/, /gif/],
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size: { in: 0..500.kilobytes }
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validates_presence_of :name, :website_url, :sponsorship_level
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end
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