Entity Framework 6 - Knowledge Base (KB)
249 results in tag: ef-migrations
EF GUID COMB strategy
Is there any way to implement the Guid COMB identity strategy for objects in the new Entity Framework 4.1 using the CodeFirst design? I thought setting the ...StoreGeneratedPattern... would work, but it still gives me normal GUIDs.
asked by Ciel
Error loading type 'System.Data.Entity.Infrastructure.DbContextInfo' in EF Migrations
I am using ContosoUniversity example. I have just used Nuget to download and install code first migrations pakage. Whe I excecute ...update-database... command it throws an error . Is there anything to do more than installing nuget package?...Update-Datab...
asked by Jayantha Lal Sirisena
NuGet Package - update-database error (EntityFramework.SqlMigrations)
i installed EntityFramework.SqlMigrations NuGet Package and i get this error . it worked for me in the past and somehow, now it does not work....PM> update-database The term 'update-database' is not recognized as the name of a cmdlet, function, script fi...
asked by mordechai
How to use EntityFramework Code first Migrations to seed data
Hi I'm using the Beta 1 version of this nuGet package, the database is allready created and I need to know if there is a way to populate my tables through migrations. Thanxs
asked by Guillermo Oramas R.
In Entity Framework Migrations, how do you seed data with many-to-many relationships?
I use entity framework migration (in Automatic migration mode). Everything is okay, but I have one question:...How should I seed data when I have many-to-many relationships?...For example, I have two model classes:...public class Parcel { public int I...
asked by Dmitry Gorshkov
When using Entity Framework Migrations 4.3, how do you name the database explicitly?
I've recently started using Entity Framework migrations and noticed that the database name is not pulling through for me when I run the ...Update-Database... command....My connectionstring is:...<connectionStrings> <add name="DataContext" connectionString...
asked by Richard Reddy
Entity Framework Code First Migration Exceptions
I'm getting several unhandled exceptions while using Code First Migrations of Entity Framework 4.3. ...The database context:...public class MyAppContext : DbContext { public DbSet<Branch> Branches { get; set; } public MyAppContext() { } } ...The...
asked by Alexander van Trijffel
Up/down migration of C# Code-First?
Started to use the add-migration command in the package manager console to generate the migrations for my model. My question is, the up and down method. I assume that the purpose of the down method is to remove all dependencies and drop the tables if they...
asked by Patrick
Entity framework is unable to create an explicit migration.
I am adding a new migration but this message shows:...Unable to generate an explicit migration because the following explicit migrations are pending: [201203170856167_left]. Apply the pending explicit migrations before attempting to generate a new e...
asked by Noman Saeed
Where can I locate the console or debug output from the package management window's code?
I'm using EntityFramework code first with migrations. From the package manager console, I'm running "update-database". This executes Configuration.Seed(context) which I have overridden.... protected override void Seed(WebContext context) { ...
asked by DanielEli
When working on various TFS branches, do you lose EF Code First Migration?
We are using TFS and have different branches for our Dev....in the branch A we made a migration to change a column size...in the branch B we made a migration to add a new table. This branch doesn not know about the branch A modification !!...both modifica...
asked by bouh
"Model backing the 'blah' context has changed since the database was established," says MVC3 and Code First Migrations.
I started off my project by using Entity Framework Code First. When I was ready I uploaded my database and code to my host provider. Everything worked....I need to add a new field to one of my classes and I don't want to loose the data in the database. Th...
asked by Scott Dietrich
Create an EF migration seed script using the Configuration class.
I have EF migrations working nicely, but I also want to generate the sql script for the seed data from my DbMigrationsConfiguration class. The seed data runs ok when I do Update-Database, but when I do UpdateDatabase -Script I do not get the sql for the s...
asked by Ian1971
Multiple Database / DbContext Migration with EF Code First
I have two database each with their own dbcontext. I've setup two migration configurations. I can add a migration for the first db ust fine (...Add-Migration DB1_InitialCreate -ConfigurationTypeName DB1Configuration...). When I try to create an initial mi...
asked by seano288
How do I utilize migrations on a production database prepared using Entity Framework 4.1?
I have a system in production which was created with Entity Framework 4.1 Code First. Now, I have upgraded to 4.3 and need to apply migrations, but there's several use cases I need to cover:...A new developer needs the database created from scratch with ...
asked by Josh Kodroff
Enable AutoMigrations as well as other migrations in Entity Framework.
I'm utilizing Entity Framework 4.3 Migrations in my project. I would like to use Automatic migrations so that when I make modifications to my domain objects and my context class, my database automatically updates when I run the project. I have this work...
asked by jdavis
Code-base Migration vs. Automatic Migration
I'm learning EF4.3 Migration, and I have read these two articles from ado.net team blog: ...http://blogs.msdn.com/b/adonet/archive/2012/02/09/ef-4-3-code-based-migrations-walkthrough.aspx...http://blogs.msdn.com/b/adonet/archive/2012/02/09/ef-4-3-automati...
asked by James
Using Entity Framework (code first) migrations in production
I'm just looking into using EF migrations for our project, and in particular for performing schema changes in production between releases. ...I have seen mentioned that there is an API to perform these migrations at run-time using the ...DbMigration... cl...
asked by devdigital
How can I stop Add-Migration checking my database has no pending migrations when using Code-Based migrations?
I'm investigating using Code-Based EF Migrations for a product that ...does not... use EF. Everything generally works well, except that the command:...Add-Migration MyTestMigration ...outputs the following message:...Unable to generate an explicit migrati...
asked by Danny Tuppeny
EF Code First DbMigration without nuget
How to migrate DB without nuget? It is not possible to use Visual Studio with nuget in production environment. Currently, many examples only teach us to use Visual Studio with nuget. How to use the generated DbMigration classes?
asked by linquize
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