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Jerrycurl - Razor-powered ORM for .NET

Jerrycurl is a free and lightweight ORM for .NET that focuses on elegant and type-safe SQL written with Razor syntax.

-- Queries/Customers/GetStats.cssql
@result CustomerStatsView
@model CustomerFilter
@project Order o

    @R.Star(m => m.Address),
        SELECT  COUNT(*)
        FROM    @o.Tbl()
        WHERE   @o.Col(m => m.CustomerId) = @R.Col(m => m.Id)
    )   AS @R.Prop(m => m.NumberOfOrders)
    @R.Tbl(m => m.Address) ON @R.Col(m => m.Address.Id) = @R.Col(m => m.AddressId)
    @R.Col(m => m.CreatedDate) >= @M.Par(m => m.CreatedAfter)
    @R.Col(m => m.CreatedDate) DESC

It allows you to build robust data access layers around ASP.NET-like MVC and CQS conventions that organizes your code into models, queries, commands and accessors.

// Accessors/CustomersAccessor.cs
public class CustomersAccessor : Accessor
    public IList<CustomerStatsView> GetStats(DateTime createdAfter)
        var filter = new CustomerFilter
            CreatedAfter = createdAfter,
        return this.Query<CustomerStatsView>(model: filter);


  • Official support for SQL Server, PostgreSQL, MySQL, Oracle and SQLite
  • CLI tool to easily generate classes from your database schema
  • Extensive collection of type-safe Razor extensions for all boilerplate SQL
  • Single queries that map complete object graphs of any cardinality
  • Batchable commands through simple @foreach expressions
  • High performance and support for all operations synchronously or asynchronously
  • Organized, ASP.NET-like project conventions with MVC
  • Native command-query separation suitable for ACID or BASE/CQRS scenarios
  • JSON support through Newtonsoft.Json or System.Text.Json
  • Integration with existing Entity Framework Core models
  • Modern language features with .NET Standard 2.1 and C# 8
  • Free and available via NuGet

To learn more about Jerrycurl and how to get started, read our official docs or check our samples repo.

Building from source

Jerrycurl can be built on any OS supported by .NET Core and included in this repository is a script that performs all build-related tasks.


  • .NET Core SDK 3.0
  • .NET Core Runtime 2.1+ / 3.0 (to run tests)
  • PowerShell 5.0+ (PowerShell Core on Linux/macOS)
  • Visual Studio 2019 (16.3+) (optional)
  • Docker (optional - for live database testing)

Clone, Build and Test

Clone the repository and run our build script from PowerShell.

PS> git clone
PS> cd jerrycurl
PS> .\build.ps1 [-NoTest] [-NoPack]

This runs the Restore, Clean, Build, [Test] and [Pack] targets on jerrycurl.sln and places any packaged .nupkg in the /artifacts/packages folder. Each target can also be run manually in Visual Studio if preferred.

By default, the Test target skips any test that requires live running database server. To help you to include these, you can use our docker compose script to boot up instances of our supported databases.

PS> .\test\tools\boot-dbs.ps1 up sqlserver,mysql,postgres,oracle

Please allow ~60 seconds for the databases to be ready after which you can re-run build.ps1; it will then automatically target the included databases instances. When done, you can tear everything down again.

PS> .\test\tools\boot-dbs.ps1 down sqlserver,mysql,postgres,oracle

If you already have an empty database running that can be used for testing, you can manually specify its connection string in the environment variable JERRY_SQLSERVER_CONN, JERRY_MYSQL_CONN, JERRY_POSTGRES_CONN or JERRY_ORACLE_CONN.

Pulling the Oracle Database image requires that you are logged into Docker and have accepted their terms of service.


Copyright © 2019 AC Dancode

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this program. If not, see


By submitting a Pull Request, you disavow any rights or claims to any changes submitted to the Jerrycurl project and assign the copyright of those changes to AC Dancode.

If you cannot or do not want to reassign those rights (your employment contract for your employer may not allow this), you should not submit a PR. Open an issue and someone else can do the work.

This is a legal way of saying "If you submit a PR to us, that code becomes ours". 99.9% of the time that's what you intend anyways; we hope it doesn't scare you away from contributing.

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