我有“车”表看起来像这样Ruby on Rails的,从另一个表信息插入表
ID | MAKE | MODEL
1 | acura | cl
2 | acura | el
3 | acura | integra
4 | audi | a3
... | ... | ...
,我需要从它使两个表,“做”表中,仅以“使“来自”车辆“表的列信息并将其放入我自己成功创建的”make_name“列中(也使其不能通过uniq方法自行重复)。
id | make_name
1 | acura
2 | audi
3 | bmw
... | ...
第二个表(“make_models”),我已经做了,但有问题获得需要的信息。表看起来像这样
id | make_id | model_name
id | makes id to which current model belongs | model from vehicles table
我试图插入该行轨控制台
@vehicles = Vehicle.all
@makes = Make.all
@vehicles.each do |v|
MakeModel.create :make_id => @current_make = @makes.where(:make_name => v.make).id, :model_name => v.model
end
但得到这个错误消息
NoMethodError: Make Load (1.0ms) SELECT "makes".* FROM "makes" WHERE "makes"."make_name" = ? [["make_name", "ACURA"]] undefined method `id' for #
非常感谢! –