如果没有 “power” 字段但有 “Temperature” 字段,那么根据您的代码逻辑,会将 “Temperature” 对象插入到数组的开头,而不是第二个位置。要将其放在第二个位置,您可以做一些调整:
nlohmann::json member;
member["Data"] = nlohmann::json::parse(data);
if (object.find("power") != object.end())
{
// Move the "power" object to the beginning of "History"
nlohmann::json& historyArray = asyncResp->res.jsonValue["History"];
historyArray.insert(historyArray.begin(), member);
}
else if (object.find("Temperature") != object.end())
{
// Insert "Temperature" object at the second position in "History",
// after the first element
nlohmann::json& historyArray = asyncResp->res.jsonValue["History"];
if (historyArray.size() > 0)
historyArray.insert(historyArray.begin() + 1, member);
else
historyArray.push_back(member); // If History is empty, add it as the first element
}
else
{
// Append other objects to the end of "History"
asyncResp->res.jsonValue["History"].push_back(member);
}
通过上述修改,即使没有 “power” 字段,也能将 “Temperature” 对象插入到数组的第二个位置。如果数组为空,则直接作为第一个元素添加到末尾。
内容由零声教学AI助手提供,问题来源于学员提问




