9/24/2023 0 Comments Dotnet ef command not recognized![]() This produces an error: The property list cannot be used, because it contains a duplicate - 'Id'. Scaffold command for table DEMO on Windows 10:ĭotnet ef dbcontext scaffold "User Id=(user) Password=(pass) Data Source=localhost:1521/orcl" Oracle.EntityFrameworkCore -output-dir Model -force -data-annotations -t DEMO -v I am not too sure if a Factory would apply for that context as I can see in your example that it gets resolved by the DI Container when you use the Repository.I tried to create model classes for my Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production database with dotnet ef. What I was really after is the understanding around the DbContext, and I’m sorry if this is all too basic questions. But as I mentioned, I don’t know how the CreateDbContext(string args) and the purpose of args there as I would need to understand it better how it works when it is called from the Update-Database, etc. So, I put the IConfiguration in the ctor of that class. What I meant in my first comment and I was wondering if the Configuration part of it and including Environment could be coming from a unique place leaving the DI to resolve that dependency. I am not sure how that Design class is hooked behind the scenes. Ok, I see… it may be my confusion around the way a DbContext is used and the “Design” side of things. But when I try to create migration via Tools->Entity Framework Core->Add. Need help wrapping your head around ASP.NET Core and EF Core? Scrum process problems got you down? Not sure what this “DevOps” thing is? We can help. Use dotnet ef command -help for more information about a command. Return new MyDbContext(optionsBuilder.Options) Īdding a class to your project that implements IDbContextFactory helps you to handle the initialization details of your DbContext class but be sure to keep in mind that it will be called from various environments. OptionsBuilder.UseSqlServer(connectionString) This would mirror the same kind of configuration and initialization that happens in ASP.NET Core’s Startup.cs. c - Command dotnet ef not found - Stack Overflow SetCommandTimeout seems like it. In my implementation of IDbContextFactory, I wanted to be able to read my connection strings from appsettings.json and from environment variables. Cannot get dotnet ef database update to work 1658 - Github Web22 avr. This pattern fits nicely with the SOLID principles and Separation of Concerns and keeps your code organized. It gives you a nice, clean way to separate the persistence details of your DbContext from the construction and configuration details for your DbContext. IDbContextFactory allows you to put the logic of creating instances of your DbContext into a type-safe class that follows a pattern that is known and usable by your code and the tooling of “dotnet ef”, Visual Studio, and Visual Studio Code. Well, you can’t remove the constructor and still have this work with ASP.NET Core. Either add a parameterless constructor to ‘MyDbContext’ or add an implementation of ‘IDbContextFactory’ in the same assembly as ‘MyDbContext’. No parameterless constructor was found on ‘MyDbContext’. Remove that method, and run “dotnet ef database update”. use rules only found within the core rule books: Dungeon Masters Guide. The problem is that if you get rid of the OnConfiguring() method, you’ll get an error when you try to run your EF Core database migration. For example, there are many multimillionaires who made it not on one big game. Don’t hard-code your DbContext connection strings! It’s terrible for deployment and maintenance and it limits your flexibility and it’s just not a good idea (Circle slash hard-coded connection strings.) That code sample used a hard-coded database connection string in the OnConfiguring() method of my DbContext class…and that stinks. In my last post, I showed you how to set up an ASP.NET Core and Entity Framework Core solution so that you can use EF Core Migrations for database updates. ![]()
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