Mongo端如何更新文档？ [复制]

Question

const string Pattern = @"(?si)<([^\s<]*totalWork[^\s<]*)>.*?</\1>";
var filter = Builders<JobInfoRecord>.Filter.Regex(x => x.SerializedBackgroundJobInfo,
                                            new BsonRegularExpression(Pattern, "i"));

var documents = await records.Find(filter).ToListAsync();

====

收到documents 后，我会处理我身边的每个文档。

const string EmptyTag = "<$1></$1>";
var updatedJobInfo = Regex.Replace(document.SerializedBackgroundJobInfo, Pattern, EmptyTag);

如何在 mongo 端做Regex.Replace？还是只能在客户端发生？

下面的Replace 在 Mongo 端有效吗？

using (var cursor = await jobInfoDocuments.FindAsync<JobInfoRecord>(filter))
{
      while (await cursor.MoveNextAsync())
      {
             var batch = cursor.Current;
             foreach (var document in batch)
             {
                 var newInfo = Regex.Replace(document.SerializedBackgroundJobInfo, regex, EmptyTag);

                  // Applying several operations within the one request.
                  operationList.Add(new UpdateOneModel<JobInfoRecord>(Builders<JobInfoRecord>.Filter.Eq("_id", document.JobId),
                                                                       Builders<JobInfoRecord>.Update.Set("SerializedBackgroundJobInfo", newInfo)));
              }

Answer 1

您可以使用 javascript 进行此操作，但请确保修复 filter 以使用 mongo shell

db.records.find(filter).forEach(function (doc) {
  var pattern = /<([^\s<]*totalWork[^\s<]*)>[\s\S]*?</\1>/i;
  var EmptyTag = "<$1></$1>";
  
  doc.SerializedBackgroundJobInfo = doc.SerializedBackgroundJobInfo.replace(pattern, EmptyTag);
  
  db.records.save(doc);
})