Necessary cookies are absolutely essential for the website to function properly. The generated Context and Models folders with entity classes look as below, PM> Scaffold-DbContext "Server=x.x.x.x.x.\SQLEXPRESS Database=master Trusted_Connection=True " -Tables TheCodeBuzzDB -OutputDir Models -ContextDir Context -Context EmployeeContextĪbove we have used Tables “ TheCodeBuzzDB“. Using the Package manager console, please run below command, Scaffold Entity framework core Single Tables Understanding EFCore scaffold-dbcontext Commands in.The above setup and many more commands are already explained in detail in the below article, Using dotnet ef dbcontext scaffold ( Global support for all EFCore projects).Using Scaffold-DbContext(Using package Manager console (PMC) for project-specific ).Scaffold Entity framework core All Tables.Scaffold Entity framework core Multiple Tables.Scaffold Entity framework core Single Tables.But, it’s easy to set up using Docker and the ng tool, so we may as well lay a good foundation for future iteration on Gadget Depot’s web app.Ĭhange the src/app/app.component. Truth be told, it’s not going to be much of an app at all, and Angular is certainly overkill for what we’re setting out to accomplish. Move over to the frontend directory and get ready to write an Angular app. ![]() All that’s left to do is make our Angular app consume this API. Now localhost:5000/api/gadgets returns our list of gadget inventory in nice, JSONified form. Public GadgetsController(ApiDbContext ctx) Public class GadgetsController : ControllerBase We’ll just copy in the code so we can get our Gadget Depot app delivered on schedule!Ĭreate the file Backend/GadgetDepot/Controllers/GadgetController.cs: using System As with the steps it took to provision the database, you can find an in-depth guide to this facet of ASP.NET programming in other tutorials. To round out our API, we need to add a controller class for exposing the gadget data. In the future, we might want a more sophisticated way to condition whether or not we want this code to run, but for the sake of immediate development, this is good enough for Gadget Depot. Note that this Initialize call will run every time the app boots. Passing this context into the DbInitializer.Initialize method allows it to make a connection with the database, and execute its routine. The trick here is to create a scope wherein we can access the services - most importantly, an ApiDbContext instance. Public static IWebHostBuilder CreateWebHostBuilder(string args) => Logger.LogError(ex, "An error occurred creating the DB.") Var logger = services.GetRequiredService>() Var context = services.GetRequiredService() Var host = CreateWebHostBuilder(args).Build() The method has a dependency on a database context, so we need to get that context from within Main.Īlter your Backend/GadgetDepot/Program.cs file to mimic the following: using System We can make this method run at startup by inserting a call to Initialize in the Main method of the Program class. The static Initialize method will programmatically make sure that the database gadget is existent, and if the "Gadgets" table is empty, it will add a few test rows. Update your appsettings.json to resemble the following: ) This connection string specifies the username, password, host address and database name for our connection. Next, we need to give our app a connection string for the dockerized PostgreSQL database. Backend/GadgetDepot/GadgetDepot.csproj file: NET how to interface with PostgreSQL, we’re going to add the Npgsql library by adding the reference to Npgsql to your. Include Gadgets in the Database Context.Add the Npgsql Entity Framework Service.Register the PostgreSQL service in the ASP.NET startup.Add a connection string in our app’s configuration.NET Core is not expecting to work with PostgreSQL – this is the first issue we’re going to fix.Īdding PostgreSQL to. We had scaffolded all the Docker features of the app, but now we need to hack on the application source code to get things up and running. You can get the final project template on GitHub. So far, we’ve written some basic startup scripts for our Gadget Depot project. We’ll break down what you need to know about Postgres and build out our API code in this installment on Docker.
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