Query: ArgumentException when chaining projections (best guess) #6938
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area-query
closed-fixed
The issue has been fixed and is/will be included in the release indicated by the issue milestone.
punted-for-2.0
punted-for-2.1
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kierenj
changed the title
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When I remove the chained projections, I get a new error: Exception Stack trace: One inner exception: Stack trace: |
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If I cut down my original query to the point where it runs, any collections of Intellisense (and the compiler) agree there's a coercion operator, but when I again try to cast my property projections via Happy to post more details as necessary - if there' a workaround in the meantime I'd be very grateful. Maybe it's just my model, but I'm really struggling to wrangle EF to do anything this week! |
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When trying to reproduce, consider using this more "complete" model: #7102 |
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We now throw different exception (dangling qsre) Simplified repro: class Program
{
static void Main(string[] args)
{
using (var ctx = new MyContext())
{
ctx.Database.EnsureDeleted();
ctx.Database.EnsureCreated();
var query = ctx.WidgetImages
.Select(i => new
{
usages = i.UsedWidgets.Select(ub => ub.WidgetUsage)
.Where(bu => bu.Retired)
})
.Select(i => new
{
bonds = i.usages.Select(u => u.Bond.Id).Distinct(),
joints = i.usages.Select(u => u.Joint.Id).Distinct(),
});
var result = query.ToList();
}
}
}
public class MyContext : DbContext
{
public DbSet<WidgetImage> WidgetImages { get; set; }
public DbSet<ImageWidgetUsageLink> ImageWidgetUsageLinks { get; set; }
public DbSet<WidgetUsage> WidgetUsages { get; set; }
public DbSet<Bond> Bonds { get; set; }
public DbSet<Joint> Joints { get; set; }
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
optionsBuilder.UseSqlServer(@"Server=.;Database=Repro6938;Trusted_Connection=True;MultipleActiveResultSets=True");
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<ImageWidgetUsageLink>().HasKey(l => new { l.ImageId, l.WidgetUsageId });
modelBuilder.Entity<ImageWidgetUsageLink>().HasOne(l => l.Image).WithMany(i => i.UsedWidgets).IsRequired(true).HasForeignKey(l => l.ImageId);
modelBuilder.Entity<ImageWidgetUsageLink>().HasOne(l => l.WidgetUsage).WithMany(u => u.ImageLinks).IsRequired(true).HasForeignKey(l => l.WidgetUsageId);
}
}
public class WidgetImage
{
public Guid Id { get; set; }
public List<ImageWidgetUsageLink> UsedWidgets { get; set; }
}
public class ImageWidgetUsageLink
{
public Guid ImageId { get; set; }
public WidgetImage Image { get; set; }
public Guid WidgetUsageId { get; set; }
public WidgetUsage WidgetUsage { get; set; }
}
public class WidgetUsage
{
public Guid Id { get; set; }
public bool Retired { get; set; }
public Bond Bond { get; set; }
public Joint Joint { get; set; }
public List<ImageWidgetUsageLink> ImageLinks { get; set; }
}
public class Bond
{
public Guid Id { get; set; }
}
public class Joint
{
public Guid Id { get; set; }
}query plan: |
ajcvickers
changed the title
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This works in 3.1 release. Generated SQL SELECT [w].[Id], [t].[Id], [t].[ImageId], [t].[WidgetUsageId], [t].[Id0], [t0].[Id], [t0].[ImageId], [t0].[WidgetUsageId], [t0].[Id0]
FROM [WidgetImages] AS [w]
LEFT JOIN (
SELECT DISTINCT [b].[Id], [i].[ImageId], [i].[WidgetUsageId], [w0].[Id] AS [Id0]
FROM [ImageWidgetUsageLinks] AS [i]
INNER JOIN [WidgetUsages] AS [w0] ON [i].[WidgetUsageId] = [w0].[Id]
LEFT JOIN [Bonds] AS [b] ON [w0].[BondId] = [b].[Id]
WHERE [w0].[Retired] = CAST(1 AS bit)
) AS [t] ON [w].[Id] = [t].[ImageId]
LEFT JOIN (
SELECT DISTINCT [j].[Id], [i0].[ImageId], [i0].[WidgetUsageId], [w1].[Id] AS [Id0]
FROM [ImageWidgetUsageLinks] AS [i0]
INNER JOIN [WidgetUsages] AS [w1] ON [i0].[WidgetUsageId] = [w1].[Id]
LEFT JOIN [Joints] AS [j] ON [w1].[JointId] = [j].[Id]
WHERE [w1].[Retired] = CAST(1 AS bit)
) AS [t0] ON [w].[Id] = [t0].[ImageId]
ORDER BY [w].[Id], [t].[ImageId], [t].[WidgetUsageId], [t].[Id0], [t0].[ImageId], [t0].[WidgetUsageId], [t0].[Id0]Single query fixed this. |
smitpatel
added
closed-fixed
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Steps to reproduce
Trying to work around the other issue I just raised by grabbing the whole DB model into memory and manually querying. New internal exception with that one too unfortunately.
Same model as #6937 .
I'm chaining selects in order to define a subexpression (
usagesin the first projection) to avoid repeating it in the second.The issue
Exception:
Stack trace:
Further technical details
EF Core version:
1.1.0-preview1-*Operating system: Windows 10
Visual Studio version: n/a (
dotnet, 1.1 Preview 1)The text was updated successfully, but these errors were encountered: