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Description

Dashing aims to be a strongly typed data access layer that is built with productivity and performance in mind.

Programming language: C#
License: MIT License
Tags: ORM     SqlServer     Micro-orm     POCO     DAL    

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README

Dashing is a simple to use mini ORM built on top of Dapper. It aims to be a strongly typed data access layer that is built with productivity and performance in mind.

📘 Documentation for v2 is available to view here.

Features

  • Convention over Configuration with code-first minimal configuration
  • SQL-like strongly typed query syntax
  • Paging support
  • Eager loading of relationships
  • Change tracking
  • CRUD operations
  • Default transactional behaviour
  • Schema generation/migrations
  • Dynamic method generation and caching
  • Builds on top of Dapper
  • Multiple database support (SQL Server/MySql right now)
  • In-memory engine for testing

Examples

Get Entity

var post = await session.GetAsync<Post>(123);
var post = await session.Query<Post>().SingleAsync(p => p.PostId == 123);

Insert

var post = new Post { Title = "Hello World" };
await session.InsertAsync(post);
Console.WriteLine(post.PostId); // 123

Update changed properties only

var post = await session.GetAsync<Post>(123);
post.Title = "New Title";
await session.SaveAsync(post); // update [Posts] set [Title] = @P1 where [PostId] = @P2

Delete

await session.DeleteAsync(post);

Eager fetching of related entities

var posts = await session.Query<Post>()
    .Fetch(p => p.Author)
    .Fetch(p => p.Tags)
    .FetchMany(p => p.Comments).ThenFetch(c => c.Author)
    .Where(p => p.Category == ".Net ORM")
    .OrderByDescending(p => p.CreatedDate)
    .ToListAsync();

Paging

var firstPage = await session.Query<Post>().AsPagedAsync(0, 10);

Count/Any

var numberPosts = await session.Query<Post>().CountAsync(p => p.Author.UserId == userId);
var hasAuthored = await session.Query<Post>().AnyAsync(p => p.Author.UserId == userId);

Bulk update entity

await session.UpdateAsync<Post>(p => p.IsArchived = true, p => p.Author.UserId == 3);
// update [Posts] set [IsArchived] = @P1 where [AuthorId] = @P2

Bulk delete

await session.DeleteAsync<Post>(p => p.IsArchived);

Drop to Dapper

await session.Dapper.QueryAsync("select 1 from Foo");

Inspect changes

post.Title = "New";
session.Inspect(post).IsPropertyDirty(p => p.Title);
var oldTitle = session.Inspect(post).GetOldValue(p => p.Title); // Old

Migrate database to match latest code

./dash migrate -a "<path to assembly>" -t "<configuration type full name>" -c "<connection string>"

Who uses Dashing?

Dashing has been developed over the last 4 years at Abstract Leap and is in use at nearly all of our clients. It's used to execute millions of queries every week.

Feature requests (and voting for them) available at Feathub

Join the chat at https://gitter.im/Polylytics/dashing