Added EF Core Migrations for multiple database providers, SQLite in development and SQL Server in production

Author: cornflourblue

Helpers/DataContext.cs

@@ -1,11 +1,23 @@
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
 using WebApi.Entities;
 
 namespace WebApi.Helpers
 {
     public class DataContext : DbContext
     {
-        public DataContext(DbContextOptions<DataContext> options) : base(options) { }
+        protected readonly IConfiguration Configuration;
+
+        public DataContext(IConfiguration configuration)
+        {
+            Configuration = configuration;
+        }
+
+        protected override void OnConfiguring(DbContextOptionsBuilder options)
+        {
+            // connect to sql server database
+            options.UseSqlServer(Configuration.GetConnectionString("WebApiDatabase"));
+        }
 
         public DbSet<User> Users { get; set; }
     }

Helpers/SqliteDataContext.cs

@@ -0,0 +1,16 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+
+namespace WebApi.Helpers
+{
+    public class SqliteDataContext : DataContext
+    {
+        public SqliteDataContext(IConfiguration configuration) : base(configuration) { }
+
+        protected override void OnConfiguring(DbContextOptionsBuilder options)
+        {
+            // connect to sqlite database
+            options.UseSqlite(Configuration.GetConnectionString("WebApiDatabase"));
+        }
+    }
+}

Migrations/SqlServerMigrations/20200102103423_InitialCreate.Designer.cs

@@ -0,0 +1,34 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace WebApi.Migrations.SqlServerMigrations
+{
+    public partial class InitialCreate : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Users",
+                columns: table => new
+                {
+                    Id = table.Column<int>(nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    FirstName = table.Column<string>(nullable: true),
+                    LastName = table.Column<string>(nullable: true),
+                    Username = table.Column<string>(nullable: true),
+                    PasswordHash = table.Column<byte[]>(nullable: true),
+                    PasswordSalt = table.Column<byte[]>(nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Users", x => x.Id);
+                });
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Users");
+        }
+    }
+}

Migrations/SqlServerMigrations/20200102103423_InitialCreate.cs

@@ -0,0 +1,51 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using WebApi.Helpers;
+
+namespace WebApi.Migrations.SqlServerMigrations
+{
+    [DbContext(typeof(DataContext))]
+    partial class DataContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "3.1.0")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128)
+                .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn);
+
+            modelBuilder.Entity("WebApi.Entities.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn);
+
+                    b.Property<string>("FirstName")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("LastName")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<byte[]>("PasswordHash")
+                        .HasColumnType("varbinary(max)");
+
+                    b.Property<byte[]>("PasswordSalt")
+                        .HasColumnType("varbinary(max)");
+
+                    b.Property<string>("Username")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Migrations/SqlServerMigrations/DataContextModelSnapshot.cs

@@ -1,7 +1,7 @@
 using System;
 using Microsoft.EntityFrameworkCore.Migrations;
 
-namespace WebApi.Migrations
+namespace WebApi.Migrations.SqliteMigrations
 {
     public partial class InitialCreate : Migration
     {

Migrations/20191223052218_InitialCreate.Designer.cs Migrations/SqliteMigrations/20200102102942_InitialCreate.Designer.cs

@@ -5,10 +5,10 @@
 using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 using WebApi.Helpers;
 
-namespace WebApi.Migrations
+namespace WebApi.Migrations.SqliteMigrations
 {
-    [DbContext(typeof(DataContext))]
-    partial class DataContextModelSnapshot : ModelSnapshot
+    [DbContext(typeof(SqliteDataContext))]
+    partial class SqliteDataContextModelSnapshot : ModelSnapshot
     {
         protected override void BuildModel(ModelBuilder modelBuilder)
         {

Migrations/20191223052218_InitialCreate.cs Migrations/SqliteMigrations/20200102102942_InitialCreate.cs

@@ -31,9 +31,9 @@ public void ConfigureServices(IServiceCollection services)
         {
             // use sql server db in production and sqlite db in development
             if (_env.IsProduction())
-                services.AddDbContext<DataContext>(x => x.UseSqlServer(_configuration.GetConnectionString("WebApiDatabase")));
+                services.AddDbContext<DataContext>();
             else
-                services.AddDbContext<DataContext>(x => x.UseSqlite("Data Source=LocalDatabase.db"));
+                services.AddDbContext<DataContext, SqliteDataContext>();
 
             services.AddCors();
             services.AddControllers();

Migrations/DataContextModelSnapshot.cs Migrations/SqliteMigrations/SqliteDataContextModelSnapshot.cs

@@ -1,4 +1,7 @@
 {
+  "ConnectionStrings": {
+    "WebApiDatabase": "Data Source=LocalDatabase.db"
+  },
   "Logging": {
     "LogLevel": {
       "Default": "Debug",

Startup.cs

@@ -2,6 +2,9 @@
   "AppSettings": {
     "Secret": "THIS IS USED TO SIGN AND VERIFY JWT TOKENS, REPLACE IT WITH YOUR OWN SECRET, IT CAN BE ANY STRING"
   },
+  "ConnectionStrings": {
+    "WebApiDatabase": "ENTER PRODUCTION SQL SERVER CONNECTION STRING HERE"
+  },
   "Logging": {
     "LogLevel": {
       "Default": "Information",