In EF .Net a migration can be rescaffolded with the following:
Add-Migration <migration_name> -force
Can i force rescaffold same migration in Entity Framework Core?
There is no such option.
But you may remove it and create again:
Remove-Migration
Add-Migration <migration_name>
Related
I am using EF core 2.X scaffolding existing database. I have generated models classes using "dotnet ef dbcontext scaffold" command and it generate model classes.
Database team has change some table I have to run "dotnet ef dbcontext scaffold" command again to generate model classes to pick only changes.
for example let say
I have one table called "employee" has column id, name.
I run "dotnet ef dbcontext scaffold" to generate models
After that I changed employee table and add one more column called "address" in database. How can I scaffold command to pick changes only .
Note: I know after generating models I should use migration to change database but our db team is has changed db and unfortunately, I have to do this. and advice
You can provide an optional parameter to the scaffolding command to update only the table you target.
Scaffold-DbContext "Server=(localdb)\mssqllocaldb;Database=DatabaseName;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -OutputDir DirectoryNameOfYourModels -Tables employee -f
If you are using .net core cli then use.
dotnet ef dbcontext scaffold "Server=(localdb)\mssqllocaldb;Database=DatabaseName;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -o DirectoryNameOfYourModels -t employee -f
This question already has answers here:
How to unapply a migration in ASP.NET Core with EF Core
(19 answers)
Closed 2 years ago.
I am trying to target a previous applied migration using dotnet ef -TargetMigration: {MigrationName}
getting below error
Unrecognized option '-TargetMigration:0'
Is this command has been removed in Entity Framework Core? Is there any alternative for this?
You can use as shown below on the package manager console :
PM > Update-Database [[-Migration] <String>]
Parameter :
-Migration <String>
Specifies the target migration.
If '0', all migrations will be reverted.
If omitted, all pending migrations will be applied.
https://docs.efproject.net/en/latest/miscellaneous/cli/dotnet.html
Remember its totally different from what you expect...
dotnet ef migrations list
dotnet ef migrations [arg] {option}
dotnet ef migrations add [name]
" " " remove //removes last
as per the instructions manually removing the changes from the database if it has been applied already. e.g dotnet ef database update.
I have created a code -first entity framework migration and applied to the database, is there a way I can rename this migration ?
You cannot rename after applying a migration to Database. But you can delete and add another migration with same name or other name.
First reset the migration to last migration
PM> update-database -TargetMigration:{lastmigrationname}
If this is the first migration then
PM> update-database -TargetMigration:0
Delete the existing migration and relevant files from the source code
Add the migration using the name you want
PM> add-migration {MigrationName}
Then update the database with new migration created
PM> update-database {MigrationName}
I use Entity Framework 7.0.0-beta7. If I want to update my database with 'dnx ef update database' I get a 'done'. But nothing happend.
Is there a way to manually (in code) start the migration and debug it?
Update: no it works
I moved the mode back to the web project,
called 'dnvm install latest'
called 'dnx ef database update -c myContext' because I have more
I meet a same issue in EF RC1. and i have a finding, hope it can help you.
i create a project to involve entity model and EF DBContext. then web project reference the project.
run these commands, not working:
dnx ef migrations add MyFirstMigration
dnx ef database update
results
but when i move the DBContext class to my web project, models still in other project, it working fine.New result
so in my scenario need make sure DBContext in Web project.
****Database Migration in Entity Framework 7 Asp.net 5 Mvc 6****
run cmd
C:>Path of Project>dnvm install -1.0.0-rc1-final
C:>Path of Project>dnvm use -1.0.0-rc1-final
C:>Path of Project>dnx ef migrations add InitialMigration
C:>path of Project>dnx ef database update
if you use multiple DbContext then we need to specify Dbcontext
C:>Path of Project>dnvm install -1.0.0-rc1-final
C:>Path of Project>dnvm use -1.0.0-rc1-final
C:>Path of Project>dnx ef migrations add InitialMigration -c DataContext
C:>path of Project>dnx ef database update -c DataContext
If your project is A and you put your DbContext in a separate class library say B, you need to append .MigrationsAssembly("A") after UseSqlServer(...) in the Startup.cs, please refer to https://github.com/aspnet/EntityFramework/issues/3840
I have been using ef code first approach. I can apply model changes using migration which was came with 4.3 of Ef. I want to migrate new model changes to test db when tfs build deployment is running. How do I?
Best regards.
Usually migrations work like that:
First. You enable migration via PM console:
PM> enable-migrations
Second. Then you add some entities to your context, and add migration:
PM> add-migration Blabla_adding_Entity
Third. Then you can apply it to the database:
PM> update-database
If you want your migrations to be automatically enabled, just set this option in your Congiguration.cs:
public Configuration()
{
AutomaticMigrationsEnabled = true;
}