ShareJS中的嵌套JSON删除

Question

我目前正在试验operational transformation的ShareJS实现(特别是JSON API )。wiki不太清楚如果我删除一个父JSON对象会发生什么，另一个操作是插入子JSON。父JSON将被重新创建，或者它将是一个无操作？

例如。

{"aa":
  {"bb":
    {"cc":"dd"}
  }
}
//Operation A and B comes in carrying the same version number
//Op A deletes "aa", Op B modifies "cc"
//What happens? (assuming A comes in slightly earlier and is processed first)

Answer 1

我自己检查过了：

op1 = [{p: ["aa"], od: {"bb": {"cc":"dd"}} }] // Deletes "aa"
op2 = [{p: ["aa", "bb", "cc"], od: "dd", oi: "ee"}] // Modifies "cc"
console.log(json.transform(op2, op1, 'left'))
>> []

这意味着，当op2在op1上转换时，它将成为无操作->不会重新创建任何对象。