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Quick notes on efcore for postgres

bitsmonkey profile image bitsmonkey ・1 min read

Got to be quick :)

Add the postgres ef library to your project from Nuget.org

`dotnet add package Npgsql.EntityFrameworkCore.PostgreSQL --version 3.1.3`

Setting the efcore middleware on Startup.cs, and picking the connection string from app settings

```csharp
services.AddDbContext<DdlContext>(options =>
            options.UseNpgsql(Configuration.GetConnectionString("MoviesConnection"))
        );
```

Now Add Your ContextClass MoivesContext

```csharp
public class DdlContext : DbContext
{
    public DbSet<Movie> Movies { get; set; }

    public DdlContext(DbContextOptions<DdlContext> options) : base(options)
    {

    }       
}
```

In case you have an existingDB which has table and column names different form your Models you can override modelling

```csharp
protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Movie>(x =>
            {
                x.ToTable("movies_new");


                x.Property(y => y.Title).HasColumnName("movie_name");
                x.Property(y => y.Year).HasColumnName("movie_year");
                x.Property(y => y.Rating).HasColumnName("movie_rating");
            }
        );

    }
```

Originally posted on Bitsmonkey
Photo by Nam Anh on Unsplash

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