34 lines
662 B
Ruby
34 lines
662 B
Ruby
class AvatarLookup
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def initialize(user_ids=[])
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@user_ids = user_ids.tap(&:compact!).tap(&:uniq!).tap(&:flatten!)
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end
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# Lookup a user by id
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def [](user_id)
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users[user_id]
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end
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private
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def self.lookup_columns
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@lookup_columns ||= [:id,
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:email,
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:username,
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:uploaded_avatar_id]
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end
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def users
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@users ||= user_lookup_hash
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end
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def user_lookup_hash
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# adding tap here is a personal taste thing
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hash = {}
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User.where(:id => @user_ids)
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.select(AvatarLookup.lookup_columns)
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.each{ |user| hash[user.id] = user }
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hash
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end
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end
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