目前,此功能未在 EF Core 中实现。但是,它正在GitHub 上进行跟踪。
1 一般解决方案
完成您想要的唯一官方方法是对您想要搭建的每个表使用命令-t
行参数(或-Tables
,取决于工具)(从而忽略所有视图):
1.1 dotnet ef 脚手架
dotnet ef dbcontext scaffold "Server=(localdb)\mssqllocaldb; Database=Blogging; Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -o Models -t Blog -t Post --context-dir Context -c BlogContext --context-namespace New.Namespace
1.2 Scaffold-DbContext
Scaffold-DbContext "Server=(localdb)\mssqllocaldb; Database=Blogging; Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models -Tables "Blog","Post" -ContextDir Context -Context BlogContext -ContextNamespace New.Namespace
2 提供商特定的解决方案
您还可以派生自己的自定义脚手架MySqlDatabaseModelFactory
并自动提供数据库的所有表,因此您不必一一指定它们:
using System.Collections.Generic;
using System.Diagnostics;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Design;
using Microsoft.EntityFrameworkCore.Diagnostics;
using Microsoft.EntityFrameworkCore.Scaffolding;
using Microsoft.EntityFrameworkCore.Scaffolding.Metadata;
using Microsoft.Extensions.DependencyInjection;
using MySql.Data.MySqlClient;
using Pomelo.EntityFrameworkCore.MySql.Infrastructure.Internal;
using Pomelo.EntityFrameworkCore.MySql.Scaffolding.Internal;
#pragma warning disable EF1001
namespace IssueConsoleTemplate
{
public class CustomMySqlDesignTimeServices : IDesignTimeServices
{
public void ConfigureDesignTimeServices(IServiceCollection serviceCollection)
=> serviceCollection
.AddSingleton<IDatabaseModelFactory, CustomMySqlDatabaseModelFactory>();
}
public class CustomMySqlDatabaseModelFactory : MySqlDatabaseModelFactory
{
public CustomMySqlDatabaseModelFactory(
IDiagnosticsLogger<DbLoggerCategory.Scaffolding> logger,
IMySqlOptions options)
: base(logger, options)
{
}
public override DatabaseModel Create(
string connectionString,
DatabaseModelFactoryOptions options)
{
//Debugger.Launch();
var tables = new HashSet<string>();
using (var connection = new MySqlConnection(connectionString))
{
connection.Open();
using (var command = connection.CreateCommand())
{
command.CommandText = @"SELECT `TABLE_NAME`
FROM `INFORMATION_SCHEMA`.`TABLES`
WHERE `TABLE_SCHEMA` = SCHEMA() AND `TABLE_TYPE` = 'BASE TABLE';";
using (var dataReader = command.ExecuteReader())
{
while (dataReader.Read())
{
tables.Add(dataReader.GetString("TABLE_NAME"));
}
}
}
}
return base.Create(
connectionString,
new DatabaseModelFactoryOptions(tables));
}
}
internal static class Program
{
private static void Main()
{
}
}
}
3 Pomelo 3.2.0+ 使用连接字符串选项的解决方案
我们刚刚在我们的 GitHub 存储库中为此功能添加了一个问题和一个PR 。
它将是3.2.0
发布的一部分,也可以在大约 24 小时内从我们的夜间构建提要中获得。
它引入了 Pomelo 和脚手架特定的连接字符串选项Scaffold:Views=off
,可以将其设置为命令行的一部分:
dotnet ef dbcontext scaffold "server=127.0.0.1; uid=root; pwd=; database=So62830251; Scaffold:Views=off" Pomelo.EntityFrameworkCore.MySql -c Context