entity-framework-core

I was updating my database by the command line, but then I manually updated one of my tables. This seems to have disrupted my ability to update-database. I receive the following error when I try to update: System.Data.SqlClient.SqlException: There is already an object named 'ClientsAndTestimonials' in the database. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) at System.Data

I've been trying to follow the advice of Ben Cull ( http://benjii.me/2016/06/entity-framework-core-migrations-for-class-library-projects ), but the database is a little different in that I'm trying to inherit from ASP.NET Core IdentityUser class. I created a new solution containing the default ASP.NET Core Web Application from the VS2015 template (CodeFirstTest). I then added an ASP.NET Core class-library (CodeFirstTest.User) to the solution, which would be the data layer in the application and where I will also be setting up ASP.NET Core Identity. Following the advice of Ben Cull, I rewrote

If I use the following field in my model: [DatabaseGenerated(DatabaseGeneratedOption.Computed)] [Timestamp] public DateTime RowVersion { get; set; } and then define the column as `RowVersion` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP I get the proper optimistic concurrency behavior from EF. That said, I'm not thrilled about using a timestamp for this since it appears to only be second resolution. And while there isn't a big chance of having 2 clients try to update the same record within 1 second, it certainly could happen, no? So with that in mind I would prefer a

In Entity Framework 6 I can use SqlFunctions.DatePart() method: var byWeek = data.GroupBy(x => SqlFunctions.DatePart("week", x.Date)); But these classes ( DbFunctions and SqlFunctions are not available in Entity Framework Core) ( reference ). So my question is How can I group by week in Entity Framework core? My current workaround for the missing functionality is var firstMondayOfYear = this.GetFirstMondayOfYear(DateTime.Now.Year); var entries = this.entitiesService.FindForLastMonths(this.CurrentUser.Id, 6) .GroupBy(x => ((int)(x.Date - firstMondayOfYear).TotalDays / 7)) The function

I recently upgraded my project from .NET Core 2.0 to 2.1. I use Entity Framework Core and have several LINQ expressions that include left joins. The following code is an example: var tickets = (from ticket in dbContext.Tickets join member in dbContext.Members on ticket.MemberID equals member.ID into memberLEFT from member in memberLEFT.DefaultIfEmpty() join memberType in dbContext.MemberTypes on member.MemberTypeID equals memberType.ID into memberTypeLEFT from memberType in memberTypeLEFT.DefaultIfEmpty() select memberType) .ToList(); If .NET Core 2.0, this line executed with no exceptions. In

How to store files in a SQL Server database using Entity Framework Core (Code-First) in an ASP.NET Core app? I have tried using Filestream but unfortunately I get this error: Cannot call Property for the property 'Avatar' on entity type 'UserProfile' because it is configured as a navigation property. Property can only be used to configure scalar properties Here's the code: public class UserProfile : BaseEntity { public FileStream Avatar { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public DateTime DateOfBirth { get; set; } public Sex Sex { get; set; }