Why do we need IDesignTimeDbContextFactory?
IDesignTimeDbContextFactory interface Implement this interface to enable design-time services for context types that do not have a public default constructor. At design time, derived DbContext instances can be created to enable specific design-time experiences, such as migrations.
Table of Contents
How do I install the Microsoft EntityFrameworkCore layout?
Visual Studio NuGet Package Manager Dialog Box
- From the Visual Studio menu, select Project > Manage NuGet Packages.
- Click the Browse or Updates tab.
- To install or update the SQL Server Provider, select Microsoft. EntityFrameworkCore. SqlServer package and confirm.
What is a DbContext factory?
The context factory is a Func
How is Singleton scoped service consumed?
Before you can use scoped services within a singleton, you must create a scope manually. A new scope can be created by injecting an IServiceScopeFactory into your service singleton (the IServiceScopeFactory is itself a singleton, which is why this works).
Do I need the Microsoft Entity Framework Core design?
EntityFrameworkCore. The layout contains all of the design-time logic for the Entity Framework Core. This is the code that is called by all the various tools (PMC cmdlets like Add-Migration, dotnet ef, and ef.exe). If you don’t use Migrations or Reverse Engineering, you don’t need it.
How do I change target projects in the Package Manager console?
EF7: Change your destination project or change your migrations…
- The question.
- Solution.
- Step 2 – Change directory to default path PM> cd ../PVStore.Web.
- Step 3: Use “migrations [comando] –help” for more information about a command.
- Step 4: Run the commands again PM> dotnet efmigrations add initial.
How to add an idesigntimedbcontextfactory implementation?
You can add a class that implements IDesignTimeDbContextFactory inside your web project. Here is the sample code: Next, navigate to your database project and run the following from the command line: dotnet ef migrations add InitialMigration –s ..
Does the idesigntimedbcontextfactory constructor have a parameter?
@ajcvickers Do you expect the above suggestion (which doesn’t need an explicit factory) to still apply in a scenario where you have your DBContext class in a separate assembly from your ASP.NET Core web project?
How to add a codingblastdbcontextfactory implementation?
Cannot create an object of type ‘CodingBlastDbContext’. Add an implementation of ‘IDesignTimeDbContextFactory’ to your project or see https://go.microsoft.com/fwlink/?linkid=851728 for additional patterns supported at design time.
How to create derived dbcontext instances in EF Core?
According to the EF Core docs, it’s a factory for creating derived DbContext instances. Implement this interface to enable services at design time for context types that do not have a public default constructor. At design time, derived DbContext instances can be created to enable specific design-time experiences, such as migrations.