There is already an object named 'xxx' in the database

There is already an object named in the database

Maybe you have changed the namespace in your project!... There is a table in your data base called ...dbo.__MigrationHistory.... The table has a column called ...ContextKey....... The value of this column is based on your ...namespace.... for example is "...DataAccess.Migrations.Configuration..."....When you change the namespace, it causes duplicat...

Invalid ObjectName xxx.dbo.xxx, but it is there

I do not understand, why the following Code does not work:... //Database connection using (var db = new KassenautomatEntities()) { //Create Model var quittung = new WAWI_Quittungen { QuittungText = "WebInterface", QuittungBetrag = amount, Quit...

EF Code First from Database - Already an object in the database

I created a new .NET project and added ADO.NET EF 6.... I went through the EF wizard and choose Code First from Database.... Then I selected a table. Let's call it "Product".... This created "public partial class Product" and "public partial class Model1". ...I immediately created a LINQ query in my application to query the "Product" but I get the...

ef core: There is already an object named in the database

Hi I am working on an aspnet core app, which using ef core version :..."Microsoft.EntityFrameworkCore.Design": "1.1.0", "Microsoft.EntityFrameworkCore.SqlServer": "1.1.0"...and dotnet standard 1.6.1....here is my scenaro:...4 dbcontext with only a database...DBSet or anyother may shows in two or three contexts, for example AContext contains t...

How to recover from Entity Framework nightmare - database already has tables with the same name

How do you get EF back in Sync with code without losing data when Update-database returns the following message...Error Message: System.Data.SqlClient.SqlException (0x80131904): There is already an object named '' in the database.

EF Core "No DbContext named xxx was found'

I have multiple contexts and one of them works, but the other three cannot be found. ...I'm using ...PM> Add-Migration InitialCreateLdapIdentity -context LdapIdentityDbContext<LdapUser, LdapUserRole> -verbose...This is what it outputs:...Finding DbContext classes... Finding IDesignTimeDbContextFactory implementations... Finding application service ...

Add child entities to database and assign them to parent object in database Entity Framework Core

I have a datamodel named "Document" which looks like this:...public class Document { [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int Id { get; set; } //[ForeignKey("Id")] public List<DocumentLine> Lines { get; set; } public DateTime PurchaseDate { get; set; } public double TotalValue { get; set; } } ...It...

EF Core There is already an object named 'AspNetRoles' in the database

It looks like we have to drop the database anytime we see this error....However, there is a way to keep the data while recreating the database:...Using SQL Server Management Studio, we can go to Task -> Generate Scripts, then in the "Set Scripting Options" window to back up the data, we should set the type of data to be backed up to "Data Only"...

Invalid Object Name error when creating database with EF Code First

Hello i am developing a database using ...EF Core Code First....I keep getting this error when generating the database :...Microsoft.EntityFrameworkCore.DbUpdateException: 'An error occurred while updating the entries. See the inner exception for details.'...InnerException {"Invalid object name 'Parents'."} System.Exception {Microsoft.Data.SqlC...

I am unable to store data into database using Entity Framework Core and Ajax

I have a problem with my code. The problem is I am not getting post data by parameter using ajax....Can anyone fix this? The code is shown below....This is Javascript Ajax code where I am sending data by post method to the controller:...$('#pending').click(function () { SaveTestResult("/Reception/PatientTests/SavePendingTest"); }); function Sa...