Adding objects using the AddRange method does not update the object id

I am using EF Core 1.1.1

. I noticed when I add IEnumerable<Entity>

using a method AddRange

and then call SaveChanges()

, then the entities are persisted in the database, however their id is not updated.

The code below does not update the ID after SaveChanges (). Note that I am passing requests asIEnumerable

    public async Task Post([FromBody]IEnumerable<string> values)
    {
        var requests = values.Select(x => new Test()
        {
            Name = x,
            Status = "Init"
        });

        await _dbContext.Tests.AddRangeAsync(requests).ConfigureAwait(false);
        await _dbContext.SaveChangesAsync().ConfigureAwait(false);

        foreach (var r in requests)
        {
            var id = r.ID;
        }
    }

      

        
        
        
      

    

The code below does not update the id after SaveChanges (). Note that I am passing request.ToList()

as a parameter to the methodAddRange

    public async Task Post([FromBody]IEnumerable<string> values)
    {
        var requests = values.Select(x => new Test()
        {
            Name = x,
            Status = "Init"
        });

        await _dbContext.Tests.AddRangeAsync(requests.ToList()).ConfigureAwait(false);
        await _dbContext.SaveChangesAsync().ConfigureAwait(false);

        foreach (var r in requests)
        {
            var id = r.ID;
        }
    }

      

        
        
        
      

    

The code below makes the ID update after SaveChanges (). Note. I call ToList()

after picking values.

    public async Task Post([FromBody]IEnumerable<string> values)
    {
        var requests = values.Select(x => new Test()
        {
            Name = x,
            Status = "Init"
        }).ToList();   //<------ ToList() or ToArray() would work

        await _dbContext.Tests.AddRangeAsync(requests).ConfigureAwait(false);
        await _dbContext.SaveChangesAsync().ConfigureAwait(false);

        foreach (var r in requests)
        {
            var id = r.ID;
        }
    }

      

        
        
        
      

    

I'm not sure if this is a bug in EF, or how this is supposed to work. I understand that IEnumerable

is lazy

and List

and Array

are eager

, but if the method AddRange

takes IEnumerable

as a parameter, then it should work independently.