[英]C# mongodb driver 2.0 - How to upsert in a bulk operation?
我从 1.9 迁移到 2.2 并阅读文档我惊讶地发现在批量操作期间不可能再插入,因为操作不允许选项。
bulkOps.Add(new UpdateOneModel<BsonDocument>(filter, update));
collection.BulkWrite(bulkOps);
应该
options.isUpsert = true;
bulkOps.Add(new UpdateOneModel<BsonDocument>(filter, update, options));
collection.BulkWrite(bulkOps);
这项工作正在进行中,是有意为之,还是我遗漏了什么? 谢谢你。
给定的 mongo 集合
IMongoCollection<T> collection
和可枚举的记录插入到 T 有 Id 字段的地方。
IEnumerable<T> records
此代码段将执行批量更新插入(过滤条件可能会根据情况更改):
var bulkOps = new List<WriteModel<T>>();
foreach (var record in records)
{
var upsertOne = new ReplaceOneModel<T>(
Builders<T>.Filter.Where(x => x.Id == record.Id),
record)
{ IsUpsert = true };
bulkOps.Add(upsertOne);
}
collection.BulkWrite(bulkOps);
在设置IsUpsert
的财产UpdateOneModel
为true打开更新到更新插入。
var upsertOne = new UpdateOneModel<BsonDocument>(filter, update) { IsUpsert = true };
bulkOps.Add(upsertOne);
collection.BulkWrite(bulkOps);
这是基于@Aviko 响应的扩展方法
public static BulkWriteResult<T> BulkUpsert<T>(this IMongoCollection<T> collection, IEnumerable<T> records)
{
string keyname = "_id";
#region Get Primary Key Name
PropertyInfo[] props = typeof(T).GetProperties();
foreach (PropertyInfo prop in props)
{
object[] attrs = prop.GetCustomAttributes(true);
foreach (object attr in attrs)
{
BsonIdAttribute authAttr = attr as BsonIdAttribute;
if (authAttr != null)
{
keyname = prop.Name;
}
}
}
#endregion
var bulkOps = new List<WriteModel<T>>();
foreach (var entry in records)
{
var filter = Builders<T>.Filter.Eq(keyname, entry.GetType().GetProperty(keyname).GetValue(entry, null));
var upsertOne = new ReplaceOneModel<T>(filter, entry){ IsUpsert = true };
bulkOps.Add(upsertOne);
}
return collection.BulkWrite(bulkOps);
}
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