Work in progress...
This guide helps you setup a new .NET 6 project using PostgreSQL as a database.
Scaffold a project
dotnet new webapi -o myapp
cd myapp
dotnet new gitignore
Configure an existing project using SQL Server to PostgreSQL
This scenario assumes that you used EntityFramework and have existing models and configuration for SQL Server.
Setup Entity Framework and PostgreSQL libraries
dotnet add package Npgsql
dotnet add package Npgsql.EntityFrameworkCore.PostgreSQL
dotnet add package Microsoft.EntityFrameworkCore
dotnet add package Microsoft.EntityFrameworkCore.Design
In appsettings.json add a connection string for PostgreSQL.
"ConnectionStrings": {
"DefaultConnection": "you_can_retain_existing_connection",
"PgConnection": "Host=localhost;Database=mydb;Username=myuser;Password=mypassword"
}
In Program.cs setup the DbContext
var connectionString = builder.Configuration.GetConnectionString("PgConnection");
builder.Services.AddDbContext<MYDB>(opt => opt.UseNpgsql(connectionString));
Run the migrations
dotnet ef migrations add InitialCreate
dotnet ef database update
Create Models
:WIP:
Reverse Engineering an Existing Database
This scenario is when you have an existing database structure. You can generate the Models automatically by running one of the following scaffolding commands. The --output-dir parameter sets the location of the generated files. If you don't specify this parameter, it will create the files in the root folder.
https://docs.microsoft.com/en-us/ef/core/managing-schemas/scaffolding?tabs=dotnet-core-cli
-- SQL Server source
dotnet ef dbcontext scaffold "Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=Chinook" Microsoft.EntityFrameworkCore.SqlServer" --output-dir Models
-- PostgreSQL source
dotnet ef dbcontext scaffold "Host=my_host;Database=my_db;Username=my_user;Password=my_pw" Npgsql.EntityFrameworkCore.PostgreSQL --output-dir Models
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