before/ after map can't work well with IQueryable projections

[ximenchuifeng]

Describe the bug
before/ after map can't work well with IQueryable projections

Declaration code

    [Mapper]
    public static partial class ProductMapper
    {
        private static partial ProductListItemResp ToListItemResp(Product product);

        [UserMapping(Default = true)]
        public static ProductListItemResp MapToListItemResp(Product product)
        {
            // before
            var resp = ToListItemResp(product);
            // after
            resp.MachineId = product.IdentifierConfig?.MachineId;
            resp.MachineName = product.IdentifierConfig?.Machine?.Name;
            resp.CommModuleId = product.IdentifierConfig?.Machine?.CommModuleId;
            resp.CommModuleName = product.IdentifierConfig?.Machine?.CommModule?.Name;

            return resp;
        }
        
        public static partial IQueryable<ProductListItemResp> ToListItemQueryableResp(this IQueryable<Product> product);
    }

Actual relevant generated code

        [global::System.CodeDom.Compiler.GeneratedCode("Riok.Mapperly", "3.6.0.0")]
        private static partial global::MixingX.Ultra.Dto.Product.Resp.ProductListItemResp ToListItemResp(global::MixingX.Ultra.Data.Entities.Product product)
        {
            var target = new global::MixingX.Ultra.Dto.Product.Resp.ProductListItemResp()
            {
                Id = product.Id,
                Name = product.Name,
            };
            target.Info = product.Info;
            target.IdentifierConfigId = product.IdentifierConfigId;
            target.IdentifierConfigName = product.IdentifierConfig?.Name;
            target.CreateAt = product.CreateAt;
            target.UpdateAt = product.UpdateAt;
            target.LastUpdaterName = product.LastUpdater?.Name;
            return target;
        }

        [global::System.CodeDom.Compiler.GeneratedCode("Riok.Mapperly", "3.6.0.0")]
        public static partial global::System.Linq.IQueryable<global::MixingX.Ultra.Dto.Product.Resp.ProductListItemResp> ToListItemQueryableResp(this global::System.Linq.IQueryable<global::MixingX.Ultra.Data.Entities.Product> product)
        {
#nullable disable
            return System.Linq.Queryable.Select(product, x => new global::MixingX.Ultra.Dto.Product.Resp.ProductListItemResp()
            {
                Id = x.Id,
                Name = x.Name,
                Info = x.Info,
                IdentifierConfigId = x.IdentifierConfigId,
                IdentifierConfigName = x.IdentifierConfig != null ? x.IdentifierConfig.Name : default,
                CreateAt = x.CreateAt,
                UpdateAt = x.UpdateAt,
                LastUpdaterName = x.LastUpdater != null ? x.LastUpdater.Name : default,
            });
#nullable enable
        }

// see also https://mapperly.riok.app/docs/configuration/generated-source/

Expected relevant generated code

  JUST CALL THE  [UserMapping(Default = true)]   Product  TO ProductListItem  Conversion

Environment (please complete the following information):

• Mapperly Version: [3.6.0.0]
• Nullable reference types: [enabled]
• .NET Version: [e.g. .NET 8.0.]
• Target Framework: [e.g. .net8.0]
• IDE: [ Rider 2024.1.4]
• OS: [e.g. macOS 13.3]

Additional context
Nothing

[trejjam]

You can rewrite your definition to make it "projection compatible":

 [Mapper]
 public static partial class ProductMapper
 {
        // one option
        [MapProperty([nameof(Product.IdentifierConfig), nameof(Product.IdentifierConfig.MachineId)], [nameof(ProductListItemResp.MachineId)])]
        // another option
        [MapPropertyFromSource(nameof(ProductListItemResp.MachineName), Use = nameof(MapMachineName))]
        // etc
        public static partial ProductListItemResp ToListItemResp(Product product);

        [UserMapping(Default = false)] // this prevents general Project => string mapping
        private static string MapMachineName(Product product) => product.IdentifierConfig?.Machine?.Name;
        
        public static partial IQueryable<ProductListItemResp> ToListItemQueryableResp(this IQueryable<Product> product);
}

Before and after mappings are not supported in projection (they can not be supported).