Linqraft.SourceGenerator 0.4.2

Linqraft

Write Select queries easily with on-demand DTO generation and null-coalescing operators. No depedendencies.

For Example:

var orders = await dbContext.Orders
    // Order: input entity type
    // OrderDto: output DTO type (auto-generated)
    .SelectExpr<Order, OrderDto>(o => new
    {
        // can use inferred member names
        o.Id,
        // null-propagation supported
        CustomerName = o.Customer?.Name,
        // also works for nested objects
        CustomerCountry = o.Customer?.Address?.Country?.Name,
        CustomerCity = o.Customer?.Address?.City?.Name,
        // you can use anonymous types inside
        CustomerInfo = new
        {
            Email = o.Customer?.EmailAddress,
            Phone = o.Customer?.PhoneNumber,
        },
        // collections available
        Items = o.OrderItems.Select(oi => new
        {
            // of course, features work here too
            ProductName = oi.Product?.Name,
            oi.Quantity
        }),
    })
    .ToListAsync();

will be generated as:

// <auto-generated />
#nullable enable
#pragma warning disable IDE0060
#pragma warning disable CS8601
#pragma warning disable CS8602
#pragma warning disable CS8603
#pragma warning disable CS8604
#pragma warning disable CS8618

using System;
using System.Linq;
using System.Collections.Generic;

namespace Linqraft
{
    file static partial class GeneratedExpression
    {
        /// <summary>
        /// generated select expression method OrderDto (explicit) <br/>
        /// at TutorialCaseTest.cs(17,14)
        /// </summary>
        [global::System.Runtime.CompilerServices.InterceptsLocationAttribute(1, "1rTP47TjaPKlTizGJTAHaXsBAABUdXRvcmlhbENhc2VUZXN0LmNz")]
        public static IQueryable<TResult> SelectExpr_54EA5DDB_8D42F5FB<TIn, TResult>(
            this IQueryable<TIn> query, Func<TIn, object> selector)
        {
            var matchedQuery = query as object as IQueryable<global::Tutorial.Order>;
            var converted = matchedQuery.Select(o => new global::Tutorial.OrderDto
            {
                Id = o.Id,
                CustomerName = o.Customer != null ? (string?)o.Customer.Name : null,
                CustomerCountry = o.Customer != null && o.Customer.Address != null && o.Customer.Address.Country != null ? (string?)o.Customer.Address.Country.Name : null,
                CustomerCity = o.Customer != null && o.Customer.Address != null && o.Customer.Address.City != null ? (string?)o.Customer.Address.City.Name : null,
                CustomerInfo = new global::Tutorial.CustomerInfoDto_F1A64BF4
                {
                    Email = o.Customer != null ? (string?)o.Customer.EmailAddress : null,
                    Phone = o.Customer != null ? (string?)o.Customer.PhoneNumber : null
                },
                Items = o.OrderItems.Select(oi => new global::Tutorial.OrderItemDto_DE33EA40
                {
                    ProductName = oi.Product != null ? (string?)oi.Product.Name : null,
                    Quantity = oi.Quantity
                })
            });
            return converted as object as IQueryable<TResult>;
        }
    }
}

namespace Tutorial
{
    public partial class CustomerInfoDto_F1A64BF4
    {
        public required string? Email { get; set; }
        public required string? Phone { get; set; }
    }

    public partial class OrderItemDto_DE33EA40
    {
        public required string? ProductName { get; set; }
        public required int Quantity { get; set; }
    }

    public partial class OrderDto
    {
        public required int Id { get; set; }
        public required string? CustomerName { get; set; }
        public required string? CustomerCountry { get; set; }
        public required string? CustomerCity { get; set; }
        public required global::Tutorial.CustomerInfoDto_F1A64BF4? CustomerInfo { get; set; }
        public required global::System.Collections.Generic.List<Tutorial.OrderItemDto_DE33EA40> Items { get; set; }
    }
}

See the GitHub Repository for more details.