ABP vNext初始化种子数据_abp dataseed-优快云博客

本文档详细介绍了如何在ABP vNext框架中初始化数据库种子数据，包括定义实体类，自定义类继承特定接口，以及运行项目将种子数据插入到数据库的步骤。

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1. 定义实体类

public class Book : AuditedAggregateRoot<Guid>
    {
        public string Name { get; set; }
        public BookType Type { get; set; }
        public DateTime PublishDate { get; set; }
        public float Price { get; set; }

        protected Book()
        {
        }

        public Book(Guid id, string name, BookType type, DateTime publishDate, float price) : base(id)
        {
            Name = name;
            Type = type;
            PublishDate = publishDate;
            Price = price;
        }
    }

2. 在`*.Domain`项目中自定义类继承接口`IDataSeedContributor`

public class BookStoreDataSeederContributor : IDataSeedContributor, ITransientDependency
    {
        private readonly IRepository<Book, Guid> _bookRepository;
        private readonly IGuidGenerator _guidGenerator;

        public BookStoreDataSeederContributor(
            IRepository<Book, Guid> bookRepository,
            IGuidGenerator guidGenerator)
        {
            _bookRepository = bookRepository;
            _guidGenerator = guidGenerator;
        }

        public async Task SeedAsync(DataSeedContext context)
        {
            if (await _bookRepository.GetCountAsync() > 0)
            {
                return;
            }

            await _bookRepository.InsertAsync(
                new Book(
                    id: _guidGenerator.Create(),
                    name: "1984",
                    type: BookType.Dystopia,
                    publishDate: new DateTime(1949, 6, 8),
                    price: 19.84f)
            );

            await _bookRepository.InsertAsync(
                new Book(
                    id: _guidGenerator.Create(),
                    name: "The Hitchhiker's Guide to the Galaxy",
                    type: BookType.ScienceFiction,
                    publishDate: new DateTime(1995, 9, 27),
                    price: 42.0f
                )
            );
        }
    }

3. 在`*.DbMigrator`项目中使用

在DbMigratorModule类中的ConfigureServices方法中增加以下代码

// Remove the contributor for migrator module
context.Services.RemoveAll(t => t.ImplementationType == typeof(IDataSeedContributor));

// Add custom data seed contributor
context.Services.AddTransient<IDataSeedContributor, BookStoreDataSeederContributor>();

4. 运行`*.DbMigrator`项目将种子数据插入数据库

{ 
    "_id" : BinData(3, "qzRKPNQ9njG7/Dn2DQs6vA=="), 
    "ConcurrencyStamp" : "e7d814f99be041c6aa9280fa6c8ae419", 
    "CreationTime" : ISODate("2020-06-28T12:19:37.793+0000"), 
    "CreatorId" : null, 
    "LastModificationTime" : null, 
    "LastModifierId" : null, 
    "Name" : "1984", 
    "Type" : NumberInt(3), 
    "PublishDate" : ISODate("1949-06-07T16:00:00.000+0000"), 
    "Price" : 19.84000015258789
}
{ 
    "_id" : BinData(3, "VkmENDKl8bufpDn2DQs8Aw=="), 
    "ConcurrencyStamp" : "a8c74d60cd1240a1b6ac54042d8e0a27", 
    "CreationTime" : ISODate("2020-06-28T12:19:38.115+0000"), 
    "CreatorId" : null, 
    "LastModificationTime" : null, 
    "LastModifierId" : null, 
    "Name" : "The Hitchhiker's Guide to the Galaxy", 
    "Type" : NumberInt(7), 
    "PublishDate" : ISODate("1995-09-26T16:00:00.000+0000"), 
    "Price" : 42.0
}