added EF migrations.

issue in EF core dotnet/efcore#12078 makes things worse

.gitignore

@@ -3,3 +3,4 @@ obj
 .suo
 /src/Flow.sln.DotSettings.user
 /src/.vs
+/src/.env

src/.config/dotnet-tools.json

@@ -0,0 +1,12 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "dotnet-ef": {
+      "version": "5.0.11",
+      "commands": [
+        "dotnet-ef"
+      ]
+    }
+  }
+}

src/Flow.sln

@@ -27,6 +27,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Flow.Infrastructure.IO", "l
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Flow.Infrastructure.IO.UnitTests", "l2\Flow.Infrastructure.IO.UnitTests\Flow.Infrastructure.IO.UnitTests.csproj", "{AAB611F2-902B-4196-97B8-E48EEE41E010}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Flow.Infrastructure.Storage.Migrations", "l2\Flow.Infrastructure.Storage.Migrations\Flow.Infrastructure.Storage.Migrations.csproj", "{D4126756-6928-4D1F-B203-DC1A4E38AD2A}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -69,6 +71,10 @@ Global
 		{AAB611F2-902B-4196-97B8-E48EEE41E010}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{AAB611F2-902B-4196-97B8-E48EEE41E010}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{AAB611F2-902B-4196-97B8-E48EEE41E010}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D4126756-6928-4D1F-B203-DC1A4E38AD2A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D4126756-6928-4D1F-B203-DC1A4E38AD2A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D4126756-6928-4D1F-B203-DC1A4E38AD2A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D4126756-6928-4D1F-B203-DC1A4E38AD2A}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -83,6 +89,7 @@ Global
 		{25C4F714-68D3-42E6-A6CB-5E063DBCDE63} = {C2DD4A7B-704F-4C12-B89E-E6A7657A418D}
 		{C99CF6F9-CFE3-4F67-B450-89B45AD7893F} = {C2DD4A7B-704F-4C12-B89E-E6A7657A418D}
 		{AAB611F2-902B-4196-97B8-E48EEE41E010} = {C2DD4A7B-704F-4C12-B89E-E6A7657A418D}
+		{D4126756-6928-4D1F-B203-DC1A4E38AD2A} = {C2DD4A7B-704F-4C12-B89E-E6A7657A418D}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {BD863072-1B8D-417A-BFF4-C60D20CE1D31}

src/docker-compose.devenv.yaml

@@ -0,0 +1,16 @@
+version: "3.8"
+services:
+  accounts-db:
+    image: postgres
+    restart: always
+    volumes:
+       - flow-storage-data:/var/lib/postgresql/data
+    environment:
+      - POSTGRES_DB=flow-dev
+      - "POSTGRES_USER=${DEV_DB_USER}"
+      - "POSTGRES_PASSWORD=${DEV_DB_PWD}"
+    ports:
+      - "${DEV_DB_PORT}:5432"
+
+volumes:
+  flow-storage-data:

src/l0/Flow.Domain.Transactions/AccountInfo.cs

@@ -4,6 +4,8 @@ namespace Flow.Domain.Transactions
 {
     public sealed class AccountInfo
     {
+        public static readonly AccountInfo Empty = new AccountInfo(string.Empty, string.Empty);
+
         public AccountInfo(string name, string bank)
         {
             Name = name;

src/l0/Flow.Domain.Transactions/RecordedTransaction.cs

@@ -2,8 +2,13 @@
 
 namespace Flow.Domain.Transactions
 {
-    public sealed class RecordedTransaction: Transaction
+    public class RecordedTransaction: Transaction
     {
+        public RecordedTransaction(long key, DateTime timestamp, decimal amount, string currency, string? category, string title)
+            : this(key, timestamp, amount, currency, category, title, AccountInfo.Empty)
+        {
+        }
+
         public RecordedTransaction(long key, DateTime timestamp, decimal amount, string currency, string? category, string title, AccountInfo account) : base(timestamp, amount, currency, category, title, account)
         {
             Key = key;

src/l2/Flow.Infrastructure.Storage.Migrations/DesignTimeDbContextBuilderFactory.cs

@@ -0,0 +1,18 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+
+namespace Flow.Infrastructure.Storage.Migrations;
+
+internal class DesignTimeDbContextBuilderFactory : IDesignTimeDbContextFactory<FlowDbContext>
+{
+    public FlowDbContext CreateDbContext(string[] args)
+    {
+        var options = new DbContextOptionsBuilder()
+            .UseNpgsql(
+                args.FirstOrDefault() ?? throw new InvalidOperationException("Connection string was not configured!"), 
+                o => o.MigrationsAssembly(typeof(DesignTimeDbContextBuilderFactory).Assembly.FullName))
+            .Options;
+
+        return new FlowDbContext(options);
+    }
+} 

src/l2/Flow.Infrastructure.Storage.Migrations/Flow.Infrastructure.Storage.Migrations.csproj

@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\Flow.Infrastructure.Storage\Flow.Infrastructure.Storage.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="5.0.11">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

src/l2/Flow.Infrastructure.Storage.Migrations/Migrations/20211106231710_initial.cs

@@ -0,0 +1,66 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+namespace Flow.Infrastructure.Storage.Migrations.Migrations
+{
+    public partial class initial : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "AccountInfo",
+                columns: table => new
+                {
+                    Name = table.Column<string>(type: "text", nullable: false),
+                    Bank = table.Column<string>(type: "text", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_AccountInfo", x => new { x.Name, x.Bank });
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Transactions",
+                columns: table => new
+                {
+                    Key = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Overrides_Comment = table.Column<string>(type: "text", nullable: true),
+                    Overrides_Title = table.Column<string>(type: "text", nullable: true),
+                    Overrides_Category = table.Column<string>(type: "text", nullable: true),
+                    account_name = table.Column<string>(type: "text", nullable: false),
+                    bank_name = table.Column<string>(type: "text", nullable: false),
+                    Timestamp = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    Amount = table.Column<decimal>(type: "numeric", nullable: false),
+                    Currency = table.Column<string>(type: "text", nullable: false),
+                    Category = table.Column<string>(type: "text", nullable: false),
+                    Title = table.Column<string>(type: "text", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Transactions", x => x.Key);
+                    table.ForeignKey(
+                        name: "FK_Transactions_AccountInfo_account_name_bank_name",
+                        columns: x => new { x.account_name, x.bank_name },
+                        principalTable: "AccountInfo",
+                        principalColumns: new[] { "Name", "Bank" },
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Transactions_account_name_bank_name",
+                table: "Transactions",
+                columns: new[] { "account_name", "bank_name" });
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Transactions");
+
+            migrationBuilder.DropTable(
+                name: "AccountInfo");
+        }
+    }
+}