[英]oData filter not working on navigation property with MongoDB and Web API
Controller looks like 控制器看起来像
public class NodesRestController : ODataController
{
private INodeService _nodeService;
public NodesRestController(INodeService nodeService)
{
_nodeService = nodeService;
}
[EnableQuery()]
public IQueryable<Node> Get()
{
return _nodeService.GetAllNodes();
}
[EnableQuery()]
public Node Get(string id)
{
return _nodeService.GetNodeById(id);
}
}
in MongoDb repository i am returning AsQueryable of the collection. 在MongoDb存储库中,我返回集合的AsQueryable。
//..............Rest of initializations
_collection = _dbContext.Database
.GetCollection<TEntity>(typeof(TEntity).Name);
//..........
public IQueryable<TEntity> GetAll()
{
return _collection.AsQueryable();
}
public TEntity Insert(TEntity entity)
{
entity.Id = ObjectId.GenerateNewId().ToString();
_collection.Insert(entity);
return entity;
}
//..............Rest of initializations
MongoDB Document looks like MongoDB文档看起来像
{
"_id" : "5688d5b1d5ae371c60ffd8ef",
"Name" : "RTR1",
"IP" : "1.2.2.22",
"NodeGroup" : {
"_id" : "5688d5aad5ae371c60ffd8ee",
"Name" : "Group One",
"Username" : null,
"Password" : null
}}
Id were generated using ObjectId.GenerateNewId().ToString() so they are stored as string. 使用ObjectId.GenerateNewId()。ToString()生成ID,因此它们以字符串形式存储。
Node and NodeGroup are pure POCOs Node和NodeGroup是纯POCO
public partial class NodeGroup : EntityBase
{
public string Name { get; set; }
public string Username { get; set; }
public string Password { get; set; }
public string LoginPrompt { get; set; }
public string PasswordPrompt { get; set; }
public string ReadyPrompt { get; set; }
public string Description { get; set; }
}
public partial class Node : EntityBase
{
public string Name { get; set; }
public string IP { get; set; }
public virtual NodeGroup NodeGroup { get; set; }
}
public abstract class EntityBase
{
//[JsonIgnore]
// [BsonRepresentation(BsonType.ObjectId)]
// [BsonId]
public string Id { get; set; }
}
Problem 问题
oData URIs like oData URI,例如
http://localhost:9910/api/NodesRest
http://localhost:9910/api/NodesRest?$expand=NodeGroup
http://localhost:9910/api/NodesRest?$expand=NodeGroup&$filter=Name eq 'RTR1'
works fine. 工作正常。
But when i try to filter on Navigation Property 但是当我尝试过滤导航属性时
http://localhost:9910/api/NodesRest?$expand=NodeGroup&$filter=NodeGroup/Name eq 'Group One'
it gives me exception 它给了我例外
message: "Unable to determine the serialization information for the expression: ConditionalExpression.", 消息:“无法确定表达式的序列化信息:ConditionalExpression。”,
I used _collection.FindAll(); 我用了_collection.FindAll(); and it worked.
而且有效。
It worked for me when i used in memory collection without using mongoDB. 当我不使用mongoDB进行内存收集时,它为我工作。 As well.
也一样
It's somethings wrong with the AsQueryable method in c# driver of mongodb. mongodb的c#驱动程序中的AsQueryable方法有点问题。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.