Question

尝试创建数组或具有ID和名称但

@campaign_ids_and_names = Hash.new
@campaign_ids.each do |cid|
  @campaign_ids_and_names.merge!(cid => Campaign.find(cid, :user => current_user).name)
end
@campaign_ids_and_names

一直只返回1

我知道在Campaign表中确实存在ID。我认为问题更多的是我如何从另一个创建1个数组或哈希的知识。

非常感谢任何帮助。

Answer 1

尝试这样的事情：

@campaign_ids_and_names = Hash.new
@campaign_ids.each do |cid|
  @campaign_ids_and_names[cid] = Campaign.find(cid, :user => current_user).name
end
@campaign_ids_and_names

您还应该检查Active Record关联：http://guides.rubyonrails.org/association_basics.html

这将帮助您清理您尝试做的更多内容，如：

@campaign_ids_and_names = Hash.new
@campaign_ids.each do |cid|
  @campaign_ids_and_names[cid] = current_user.campaigns.find(cid).name
end
@campaign_ids_and_names

ruby，创建哈希时出错

1 个答案: