Entity Framework 6 - Knowledge Base (KB)
122 results for: in tag: code-first-migrations
EF Migrations error: could not load type 'System.Data.Entity.Infrastructure.DbContextInfo'
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
How to seed data using EntityFramework Code first Migrations
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.
Exceptions for Entity Framework Code First Migrations
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
C# Code-First migration, up/down?
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
Where can I find the console or debug output from code executed in the package manager window?
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
EF Code First Migration with Multiple Database / DbContext
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
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
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
EF Code First Migrations: MigrateDatabaseToLatestVersion without NUGET
I need help to clarify how EF Code First Migrations works on production machine. I've some entity classes and DbContext-derived class to access entities. Now, I want to perform these several things:...when my application starts, it must create database, i...
asked by Dennis
Entity Framework 5 Nuget Console commands
So I am making a DB with EF 5 Code first, I have checked some guides and found some "important"/useful commands like: "Update-Database -Force -Verbose". However I know there must be more commands like these, something like: "Purge-Database", but no succes...
asked by Maximc
An error occurred while getting provider information from the database
Getting the error:...System.Data.ProviderIncompatibleException: An error occurred while getting provider information from the database. This can be caused by Entity Framework using an incorrect connection string.... Check the inner exceptions for detail...
asked by user1538467
Enabling Code First Entity Framework VS Web Express 2012
I am trying to enable Code First in my Visual Studio Web Express 2012. From what I have read so far I have to use the Package Manager Console and the command Enable-Migrations. When I do this I get the following error. ...Exception calling "LoadFrom" wit...
asked by jackncoke
Update-Database tries to do an automatic migration even with automatic migrations disabled
I work on a team of 4 developers using EF5, everyone working on their own local database. Up until now we've been using automatic migrations but we're nearing the point where we need to release to production so we've disabled automatic migrations and star...
asked by Dave Graves
Database Initializer not being called in EF 5 + MVC 3
I know this question might be duplicated, but I haven't found any solution for my problem yet....I have:...protected void Application_Start() { Database.SetInitializer(new DatabaseSeeder()); DatabaseContext c = new Database...
asked by TapiocaCom
Code First Migrations for a custom NuGet package can't be executed from main application
I have created a module to be included in a main MVC3 web application. The module is packaged into a NuGet package and it can be installed and uninstalled via NuGet. Both, the main site and the module use Code First, EF >= 4.3...To create the package I ha...
asked by Alfonso Muñoz
What is the data annotation for changing nullable and not null data types?
I reckon this should be simple for experienced programmers but here it goes. I am working on a project using entity framework code first.I have also enabled migrations and set to auto (Lovely feature)....I stupidly declared one of the datatype wrong in my...
asked by Komengem
How to add a new code-first migration with a newly-generated database?
I've enabled code-first migrations on my entity framework project, and have added several migrations which do things like rename tables. However, I have now deleted the database and caused entity framework to generate a brand new database based on my lat...
asked by Jez
Migrations in Entity Framework in a collaborative environment
We have multiple developers working on a project that uses Entity Framework 5.0. Every developer uses his own local SQL 2012 database so he can develop and test without impeding others....At first, we used a hybrid of automatic migrations and code-based m...
asked by JulianR
Re-create table with Entity Framework 5 and nuget
I am using Code First to create a table. ...I created the class, the mapping file and issued the add-migration command in nuget and then the update-database command...I then changed the class and like an idiot deleted the table....I deleted the migration...
asked by James Helms
Generate full SQL script from EF 5 Code First Migrations
How do I use Entity Framework 5 Code First Migrations to create a full database script from the initial (empty) state to the latest migration?...The blog post at ...MSDN Blog... suggests to do this, but it seems to create an empty script:...Update-Databas...
asked by Matt Wilson
Page 1 of 7
