我有一个数组对象的哈希：
{
false=>[#<Campaign id: 1, name: "campaign 1", active: false>, #<Campaign id: 3, name: "campaign 3", active: false>, #<Campaign id: 4, name: "campaign 4", active: false>],
true=>[#<Campaign id: 2, name: "campaign 2", active: true>]
}
如何将上述哈希转换为哈希
{
false=>[{id:1, name:"campaign 1"}, {id:3, name: "capaign 3"}, ....],
true =>[{id:2, name:"campaign 2"}]
}
hash.each {|k,v| hash[k] = v.map{|e| {id: e[:id], name: e[:name]}}}
并且如果可以使用select_allmethod获取哈希数组，而不是对象数组，则无需隐蔽对象即可哈希。
ModelName.connection.select_all("select id, name from <table_name>;")
=> [{id:xxx, name: xxx}.......]
本文收集自互联网，转载请注明来源。
如有侵权，请联系[email protected] 删除。
我来说两句