Entity Framework 6 - Knowledge Base (KB)
19 results in tag: migration
How can I perform database migration using Entity Framework 4.2?
I'm just starting to dive into ASP.net MVC3. I come from a Django background. One of the things I love about Django, is the add-on called "South". It lets me modify my Models in code, and then I run a command, it figures out what has changed, and it updat...
asked by mpen
Package Manager Console Enable-Migrations CommandNotFoundException only in a specific VS project
I tried to run the command 'Enable-Migrations' in a new project and I got the message:...PM> Enable-Migrations The term 'Enable-Migrations' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the na...
asked by Eduardo Brites
No initial create with Entity Framework migrations
I'm trying to get Entity framework migrations working. I've enabled code first migrations, its created a migrations folder, config file and the mig history table, but no initial create. Am i missing a step? This is a new db created by EF (4.3.1).
asked by newbie_86
Set StartUp Project parameter for Entity Framework migrations
When using EF 4.3.1 migrations every time i need to add a migration or update database i have to use the StartUpProject parameter. Can I set this somewhere so I don't have to keep doing this? I don't want to set my data project as the start up project. My...
asked by newbie_86
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
How can I disable code first migrations
I have a code-first entity model in EF5. But I want to manage the database changes manually -- I do not want EF to modify my existing database and all its data. But when I make parallel changes in the EF mapping and in the database, EF refuses to operate ...
asked by Stan Hargrove
EF code first - Model compatibility cannot be checked because the database does not contain model metadata
I have enabled automatic migrations. Then, I deleted my whole db. Next, i executed ...Update-database... from command console, and it recreated my db. Then, I started my application only to see this error:...Model compatibility cannot be checked because t...
asked by ojek
Entity Framework MigrationSqlGenerator for SQLite
is there a MigrationSqlGenerator for SQLite to use with entity framework? I only found one from devart which is commercial....No MigrationSqlGenerator found for provider 'System.Data.SQLite'. Use the SetSqlGenerator method in the target migrations confi...
asked by masterchris_99
Entity framework migration not detecting any changes
I was running successfully ...Entity framework 6.0.0-alpha3... until today. Today I decided to update to ...Entity framework 6.0.0-rc1..., and as specified ...here... in order to run my migrations I need to remove all the previous migrations made by ...ef...
asked by ojek
Entity framework migrations - generate sql script of current database model
I am trying to generate sql script that will create a database for me. So far I tried this:...Update-Database -Script -SourceMigration: $InitialDatabase Update-Database -Script -SourceMigration:0 ...But both of those are giving me scripts that are beggini...
asked by ojek
EntityFramework 6 Migrations for both existing and new databases?
In our software, we have a customer base with existing databases. The databases are currently accessed via EntitySpaces, but we'd like to switch to EntityFramework (v6), as EntitySpaces is no longer supported. We'd also like to make use of the migrations ...
asked by hoekki
Entity Framework 6 Model First Migration
Desired outcome:...Use model first approach with Entity Framework and allow changes to deployed database/ model to be done automatically based on the changes in the model. Automatic schema difference script generation to allow smooth migrations....Is ther...
asked by Levent
Entity Framework rollback and remove bad migration
I'm using EF 6.0 for my project in C# with manual migrations and updates. I have about 5 migrations on the database, but I realised that the last migration was bad and I don't want it. I know that I can rollback to a previous migration, but when I add a n...
asked by Martin Brabec
How can I permanently fix the "EdmFunctionAttribute is obsolete" warning, which occurs after upgrading to EF6?
I am getting the warning ..."EdmFunctionAttribute is obsolete"... after I have ...upgraded a ...database first project... from EF4 to EF 6.1.3...:...'System.Data.Entity.Core.Objects.DataClasses.EdmFunctionAttribute' is obsolete: 'This attribute has been...
asked by Matt
Visual Studio 2015 RC Entity Framework 6.1.3 Migrations Error
The pasted below error only occurs when the solution has more than one project that references the EntityFramework. When run the "Enable-Migrations" or "Add-Migration", I received the following error:...New-Object : The value supplied is not valid, or the...
asked by Hudson Cavazin
Entity Framework Code First Migration in MySql DataBase
I create code first model using entity framework and after install first version to client we found some change in columns of database , I use migration of Entity Framework and you apply all steps of migration bat the data base of client not exist rows of...
asked by Iskandar Enuml
EF Migrations - There is already an object named '' in the database
I am having trouble adding a new table to my database. these are the commands I entered when trying to add the new migration:...Add-Migration AdminSett ...Scaffolding migration 'AdminSett'. The Designer Code for this migration file includes a snapshot o...
asked by Cathal O 'Donnell
Update-database problem in asp.net MVC application
When i update database in package manager console i have this error...Introducing FOREIGN KEY constraint 'FK_dbo.Appointments_dbo.Users_AppointmentManagerId' on table 'Appointments' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION o...
asked by zied ben othman
How to enable migration for EF 6.4 and MySQL C#?
I tried to enable migrations using the command ...Enable-Migrations...But I got the error below, I didn't really understand how to solve it......I installed all the extensions to make it works. ...The error message :...Checking if the context targets an e...
asked by PierreDuv
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