1 class Artist < ActiveRecord::Base
3 has_many :original_pictures
5 has_many :resource_pictures
7 validates :name, :presence => true, :length => {:maximum => 30}
8 validates :author_id, :numericality => {:allow_blank => true}
11 self.name = 'no name' if self.name.blank?
15 return false unless au
16 self.author_id = au.id
20 return false unless author
21 self.author_id == author.id
28 def self.find_by_author author
29 Artist.find( :first, :conditions => ['author_id = ?', author.id])
32 def self.default_page_size
36 def self.max_page_size
40 def self.page prm = nil
46 def self.page_size prm = self.default_page_size
48 page_size = self.max_page_size if page_size > self.max_page_size
49 page_size = self.default_page_size if page_size < 1
53 def self.offset cnt, prm = nil
55 offset = cnt - 1 if offset >= cnt
56 offset = cnt - offset.abs if offset < 0
57 offset = 0 if offset < 0
61 def self.list page = 1, page_size = self.default_page_size
63 opt.merge!(Artist.list_opt)
64 opt.merge!({:limit => page_size, :offset => (page -1) * page_size}) if page_size > 0
65 opt.merge!({:order => 'created_at desc'})
66 Artist.find(:all, opt)
70 {:include => {:author => {}} }
73 def self.list_json_opt
74 {:include => {:author => {}} }
79 opt.merge!(Artist.show_opt)
80 res = Artist.find(aid, opt)
81 raise ActiveRecord::Forbidden unless res.visible?(au)
87 opt.merge!(Artist.show_opt)
88 res = Artist.find sid, opt
89 raise ActiveRecord::Forbidden unless res.own?(au)
94 {:include => {:author => {}} }
97 def self.show_json_opt
98 {:include => {:author => {}} }
101 def self.visible_count