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  1. Entity Framework
  2. EF-170

MongoDB.EFCore query specific condition issue

    • Type: Icon: Bug Bug
    • Resolution: Gone away
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: None
    • Dotnet Drivers

      Hi,

      I got some problem when developing my dotnet web application with MongoDB.EntityFrameworkCore,

      When I have querying data with specific condition, it won’t work

      using MongoDB.Bson;
      using Application.Domain.Aggregate;
      using Application.Domain.Repository;
      
      namespace Application.Infrastructure.Core.Data.Impl;
      
      public class MemberInfoMongoRepository : IMemberInfoMongoRepository
      {
      
          private readonly MemberInfoContext _memberInfoContext;
      
          public MemberInfoMongoRepository(MemberInfoContext memberInfoContext)
          {
              _memberInfoContext = memberInfoContext;
          }
      
          public async Task<MemberInfo> GetMemberInfoAsync()
          {
              //data load into _memberInfoContext.MemberInfo for sure
      
              //get 10 row correct data
              var test1 = await _memberInfoContext.MemberInfo.OrderByDescending(c => c.Id).Take(10).AsNoTracking().ToListAsync();
      
              //get correct data
              var test2 = await _memberInfoContext.MemberInfo.FirstOrDefaultAsync();
      
              // pretty sure this is in my database
              //null 
              var test3 = await _memberInfoContext.MemberInfo.Where(x => x.MemberEmail == "tUryw34u7r8ko@gmail.com").AsNoTracking().ToListAsync();
      
              //null
              var test4 = await _memberInfoContext.MemberInfo.Where(x => x.MemberEmail.Equals("tUryw34u7r8ko@gmail.com")).AsNoTracking().ToListAsync();
      
              //null
              var test5 = await _memberInfoContext.MemberInfo.AsNoTracking().FirstOrDefaultAsync(x => x.MemberEmail == "tUryw34u7r8ko@gmail.com");
      
              return test2 ;
          }
      }
      

      but the document says normal Efcore API works,but I tried over and over again,still don’t know what’s wrong

      and also print log in my console

      Microsoft.EntityFrameworkCore.Database.Command[35000]
            Executed MQL query
            my_member.member_info.aggregate([{ "$sort" : { "_id" : -1 } }, { "$limit" : NumberLong(10) }])
      info: Microsoft.EntityFrameworkCore.Database.Command[35000]
            Executed MQL query
            my_member.member_info.aggregate([{ "$limit" : NumberLong(1) }])
      info: Microsoft.EntityFrameworkCore.Database.Command[35000]
            Executed MQL query
            my_member.member_info.aggregate([{ "$match" : { "MemberEmail" : "tUryw34u7r8ko@gmail.com" } }, { "$limit" : NumberLong(1) }])
      info: Microsoft.EntityFrameworkCore.Database.Command[35000]
            Executed MQL query
            my_member.member_info.aggregate([{ "$match" : { "MemberEmail" : "tUryw34u7r8ko@gmail.com" } }, { "$limit" : NumberLong(1) }])
      info: Microsoft.EntityFrameworkCore.Database.Command[35000]
            Executed MQL query
            my_member.member_info.aggregate([{ "$match" : { "MemberEmail" : "tUryw34u7r8ko@gmail.com" } }, { "$limit" : NumberLong(1) }])
      

      and some other settings

      using MongoDB.EntityFrameworkCore;
      using MongoDB.Bson;
      using MongoDB.Bson.Serialization.Attributes;
      
      [Collection("member_info")]
      public class MemberInfo
      {
          public ObjectId Id { get; set; }
      
          public long MemberId { get; set; }
      
          public string MemberEmail{ get; set; }
      }
      
      using Microsoft.EntityFrameworkCore;
      using Application.Domain.Aggregate;
      
      namespace Application.Infrastructure.Core.Data;
      
      public class MemberInfoContext : DbContext
      {
          public DbSet<MemberInfo> MemberInfo { get; set; }
      
          public MemberInfoContext(DbContextOptions options)
              : base(options)
          {
          }
      
          protected override void OnModelCreating(ModelBuilder modelBuilder)
          {
              base.OnModelCreating(modelBuilder);
      
              modelBuilder.Entity<MemberInfo>();
          }
      }
      

      Program.cs

      var mongoDBSettings = config.GetSection("MongoDBSettings").Get<MongoDBSettings>();
              services.Configure<MongoDBSettings>(config.GetSection("MongoDBSettings"));
      
              services.AddDbContext<MemberInfoContext>(options =>
              {
                  options.UseMongoDB(mongoDBSettings.ConnectionString, mongoDBSettings.Database)
                      .UseLoggerFactory(LoggerFactory.Create(builder => { builder.AddConsole(); }))
                      .EnableSensitiveDataLogging();
              });
      

      project version: 8.0
      MongoDB.EntityFrameworkCore nuget package version: 8.1.0 、8.1.1
      db version: 7.0.5

            Assignee:
            damien.guard@mongodb.com Damien Guard
            Reporter:
            leotsai8597@gmail.com Leo Tsai
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            Watchers:
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              Created:
              Updated:
              Resolved: