我在这种关联方面遇到了麻烦。
我需要获得属于排中士兵的一系列初选。所以,一旦我把所有士兵都排成一排: @company = Company.find_by_id(1) @platoons = @ company.platoons
<% @platoons.each do |p| %>
<%= p.soldiers.primaries.find(:all,:conditions => ["relationship = ? AND contacted = ?", 'Spouse', 'Yes'])) %>
<% end %>
***所以没有初选方法,我认为这是因为我试图在数组上调用关联。士兵有一个排,但初选没有,他们只与那个排的士兵有联系。我该怎么做呢?我需要它来返回一组Primaries。提前谢谢!
class Soldier < ActiveRecord::Base
belongs_to :company
belongs_to :platoon
has_many :primaries, :dependent => :destroy
end
class Platoon < ActiveRecord::Base
belongs_to :company
belongs_to :battalion
has_many :soldiers
end
class Primary < ActiveRecord::Base
belongs_to :soldier
belongs_to :company
end
答案 0 :(得分:0)
你可以穿过士兵:
<% @platoons.each do |platoon| %>
<% p.soldiers.each do |soldier| %>
<%= soldier.primaries.find(:all,:conditions => ["relationship = ? AND contacted = ?", 'Spouse', 'Yes'])) %>
<% end %>
<% end %>
这不是最佳或优雅的。更好的解决方案是:
class Platoon < ActiveRecord::Base
belongs_to :company
belongs_to :battalion
has_many :soldiers
has_many :primaries, :through => :soldiers
end
然后你的观点是:
<% @platoons.each do |platoon| %>
<%= platoon.primaries.find(:all,:conditions => ["relationship = ? AND contacted = ?", 'Spouse', 'Yes'])) %>
<% end %>