使用此包装器调用UpdateOneAsync时:
public async Task<UpdateResult> UpdateDocument<T>(
string sCollectionName,
Expression<Func<T, bool>> filter,
UpdateDefinition<T> update,
bool bUpsert,
System.Threading.CancellationToken cancellationToken
)
{
IMongoDatabase db = _mongoClient.GetDatabase(_optionsMonitor.CurrentValue.databasename);
IMongoCollection<T> collection = db.GetCollection<T>(sCollectionName);
return await collection.UpdateOneAsync<T>(filter, update, new UpdateOptions() { IsUpsert = bUpsert }, cancellationToken);
}
像这样:
private async Task<Models.Errors> UpdateDbOnSyncServerToBoardUpdate(
CancellationToken cancel,
MongoDB.Bson.BsonDocument bsonDocConfigurationToUpdate,
DateTime dtUpdated,
string sId,
int iObjectId,
string sAppName,
string sModelName
)
{
MongoDB.Driver.UpdateResult updateResult = null;
Models.Errors errors = null;
try
{
updateResult = await _db.UpdateDocument<Models.Database.NodeBoardModel>(
Constants.NodeBoardCollectionName,
node => node.Id == sId &&
node.RemoteBoard.apps.SingleOrDefault(
app => app.appname == sAppName).objects.
SingleOrDefault(model => model.name == sModelName).config_docs.
Any(config => config.config_id == iObjectId),
MongoDB.Driver.Builders<Models.Database.NodeBoardModel>.Update.
Set(
node => node.RemoteBoard.apps[-1].objects[-1].config_docs[-1].config_doc, bsonDocConfigurationToUpdate).
Set(
node => node.RemoteBoard.apps[-1].objects[-1].config_docs[-1].config_dt, dtUpdated),
false,
cancel
);
我收到NotSupportedException:
不支持表达式树:{document} {RemoteBoard} {apps} .SingleOrDefault(app =>(app.appname ==“ eACM”))。objects.SingleOrDefault(model =>(model.name == “标签”))。config_docs
我感觉我以错误的方式或MongoDb不支持的方式使用LINQ关键字,但是很难准确地指出问题所在。
我无法对堆栈进行任何跟踪:
在MongoDB.Driver.Linq.Processors.EmbeddedPipeline.EmbeddedPipelineBinder.BindNonMethodCall(表达式节点)上的在MongoDB.Driver.Linq.Processors.PipelineBinderBase
1.BindPipeline(Expression node) at MongoDB.Driver.Linq.Processors.PipelineBinderBase
1.BindMethodCall(MethodCallExpression节点)处 在MongoDB.Driver.Linq.Processors.EmbeddedPipeline.EmbeddedPipelineBinder.Bind(表达式节点,IBindingContext父级) 在MongoDB.Driver.Linq.Processors.SerializationBinder.VisitMethodCall(MethodCallExpression节点) 在System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor访问者) 在MongoDB.Driver.Linq.Processors.SerializationBinder.Visit(表达式节点)上 在System.Linq.Expressions.ExpressionVisitor.VisitBinary(BinaryExpression节点) 在MongoDB.Driver.Linq.Processors.SerializationBinder.VisitBinary(BinaryExpression节点) 在System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor访问者) 在MongoDB.Driver.Linq.Processors.SerializationBinder.Visit(表达式节点)上 在MongoDB.Driver.Linq.Translators.PredicateTranslator.Translate [TDocument](表达式1 predicate, IBsonSerializer
1 parameterSerializer,IBsonSerializerRegistry serializerRegistry)处 在MongoDB.Driver.MongoCollectionImpl1.ConvertWriteModelToWriteRequest(WriteModel
1模型上,Int32索引) 在System.Linq.Enumerable.SelectIterator [TSource,TResult](IEnumerable1 source, Func
3选择器)处+ MoveNext() 在System.Collections.Generic.List1.AddEnumerable(IEnumerable
1上可枚举) 在System.Linq.Enumerable.ToList [TSource](IEnumerable1 source) at MongoDB.Driver.Core.Operations.BulkMixedWriteOperation..ctor(CollectionNamespace collectionNamespace, IEnumerable
1个请求,MessageEncoderSettings messageEncoderSettings)处 在MongoDB.Driver.MongoCollectionImpl1.CreateBulkWriteOperation(IEnumerable
1个请求中,使用BulkWriteOptions选项) 在MongoDB.Driver.MongoCollectionImpl1.BulkWriteAsync(IClientSessionHandle session, IEnumerable
1个请求中,BulkWriteOptions选项,CancellationToken cancelledToken) 在MongoDB.Driver.MongoCollectionImpl1.UsingImplicitSessionAsync[TResult](Func
2 funcAsync,CancellationToken cancelledToken处) 在MongoDB.Driver.MongoCollectionBase1.UpdateOneAsync(FilterDefinition
1过滤器上,UpdateDefinition1 update, UpdateOptions options, Func
3 bulkWriteAsync) 在C:\ GIT \ app-manager \ APIMM \ ServerLevelConfiguration \ WebApplication \ Services \ ConcreteDatabase中的WebApplication.Services.ConcreteDatabase.UpdateDocument [T](字符串sCollectionName,表达式1 filter, UpdateDefinition
1更新,布尔bUpsert,CancellationToken cancelledToken)处。 CS:第131行 在Web应用程序.Services.SyncBoardDatabaseBackgroundService.UpdateDbOnSyncServerToBoardUpdate(CancellationToken取消,BsonDocument bsonDocConfigurationToUpdate,DateTime dtUpdated,字符串sId,Int32 iObjectId,字符串sAppName,字符串sModelName)中位于C:\ GIT \ app-manager \ APIMM \ ServerBackground \ Web。 cs:353行
模型类:
public class NodeBoardModel
{
[BsonId]
[BsonRepresentation(BsonType.ObjectId)]
public string Id { get; set; }
[BsonElement]
public NodeBoardRemoteModel RemoteBoard { get; set; }
}
public class NodeBoardRemoteModel
{
[BsonElement]
public List<NodeBoardAppModel> apps { get; set; }
}
public class NodeBoardAppModel
{
[BsonElement]
public string appname { get; set; }
[BsonElement]
public List<NodeBoardObjectModel> objects { get; set; }
}
public class NodeBoardObjectModel
{
[BsonElement]
public string name { get; set; }
[BsonElement]
public List<NodeBoardObjectConfigurationModel> config_docs { get; set; }
}
public class NodeBoardObjectConfigurationModel
{
[BsonElement]
public BsonDocument config_doc { get; set; }
[BsonElement]
public DateTime config_dt { get; set; }
[BsonElement]
public int config_id { get; set; }
}
答案 0 :(得分:2)
当您尝试构建Update
语句时,问题开始了。您可能知道,-1
将作为索引传递给translated。 $ positional operator说
位置$运算符不能用于遍历一个以上数组的查询,例如遍历嵌套在其他数组中的数组的查询,因为$占位符的替换是单个值>
此外,您尝试使用SingleOrDefault
建立过滤条件,并且.NET MongoDB驱动程序无法将其转换为任何MongoDB查询语法运算符。
该如何解决?
您可以尝试使用documentation语法来代替使用位置运算符。
var filter = Builders<NodeBoardModel>.Filter.Eq(f => f.Id, sId);
var update = Builders<NodeBoardModel>.Update.Set("RemoteBoard.apps.$[app].objects.$[object].config_docs.$[configdoc].config_dt", dtUpdated);
var arrayFilters = new List<ArrayFilterDefinition>();
ArrayFilterDefinition<BsonDocument> appFilter = new BsonDocument("app.appname", new BsonDocument("$eq", sAppName));
ArrayFilterDefinition<BsonDocument> objectFilter = new BsonDocument("object.name", new BsonDocument("$eq", sModelName));
ArrayFilterDefinition<BsonDocument> configDocFilter = new BsonDocument("configdoc.config_id", new BsonDocument("$eq", iObjectId));
arrayFilters.AddRange(new[] { appFilter, objectFilter, configDocFilter });
var updateOptions = new UpdateOptions { ArrayFilters = arrayFilters };
var res = Col.UpdateOne(filter, update, updateOptions);