所以,我有一个 JSON 数组,我通过它循环并添加三个键及其值,我还想从数组中的每个元素中删除/删除一个键(subject_id)。
如何着手做这件事?
s=JSON.parse(subjects.to_json)
s.each do |j|
j["total_classes"] = total_classes[i]
j["attended_classes"] = attended_classes[i]
j["subject_name"] = subject_name[i]
j["subject_id"] #remove this key, how?
i=i+1
end
render json: { attendances: s }
最佳答案
试试这个
j.delete("subject_id")
关于arrays - 从 JSON 数组中的每个元素中删除一个键 - Ruby,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41449996/