Not Mapping Type without public Constructor

[vk-git-hub]

Please, help by problem InvalidOperationException: No default constructor for type 'FilterCondition', please use 'ConstructUsing' or 'MapWith'

Example Code

config.NewConfig<ModelLayer.Report.Grid.GridPropertyView, ReportService.Models.GridPropertyView>()
//.MapToConstructor(true);
.ConstructUsing(src => new ReportService.Models.GridPropertyView(
new ReportService.Models.Common.HeaderTemplateView(), new ReportService.Models.Common.SortDescriptionView(),
new List<ReportService.Models.Common.ColumnFilterView>(),
new List<Dictionary<string, string>>(), new List<Dictionary<string, string>>(),
new List<ReportService.Models.Common.GridColumnView>(), new ReportService.Models.Group.GroupView()
))

            .Map(dest => dest.HeaderTemplate, src => src.HeaderTemplate ?? new ModelLayer.Report.Grid.Common.HeaderTemplateView())
            .Map(dest => dest.SortingColumn, src => src.SortingColumn ?? new ModelLayer.Report.Grid.Common.SortDescriptionView())
            .Map(dest => dest.ColumnsFilters, src => src.ColumnsFilters ?? new List<ModelLayer.Report.Grid.Common.ColumnFilterView>())
            .Map(dest => dest.CustomFooter, src => src.CustomFooter ?? new List<Dictionary<string, string>>())
            .Map(dest => dest.CustomHeader, src => src.CustomHeader ?? new List<Dictionary<string, string>>())
            .Map(dest => dest.ColumnsProperties, src => src.ColumnsProperties ?? new List<ModelLayer.Report.Grid.Common.GridColumnView>())
            .Map(dest => dest.Group, src => src.Group ?? new ModelLayer.Report.Grid.Common.GroupView());

[DocSvartz]

@vk-git-hub What version of Mapster are you using? What type is FilterCondition?

This could be due to the following reasons:

1. FilterCondition type does not have a public parameterless constructor new();
2. FilterCondition type does not have public constructors;
3. source type mapped to FilterCondition type does not contain properties or fields that can be used in the constructor;
   3.1) There is no configuration for mapping the source type to FilterCondition type.

Try add this in you config:

TypeAdapterConfig.GlobalSettings
    .ForDestinationType<FilterCondition>()
    .ConstructUsing(()=>new FilterCondition(...));

[DocSvartz]

@vk-git-hub I think I figured out what the problem is.

[vk-git-hub]

Thanx for the reply!

Mapster 10.0.1
FilterCondition - ReportService.Models.GridPropertyView

1.FilterCondition type have a public parameterless constructor new();
2.FilterCondition have public constructors;
3..ConstructUsing(src => new ReportService.Models.GridPropertyView(
new ReportService.Models.Common.HeaderTemplateView(), new ReportService.Models.Common.SortDescriptionView(),
new List<ReportService.Models.Common.ColumnFilterView>(),
new List<Dictionary<string, string>>(), new List<Dictionary<string, string>>(),
new List<ReportService.Models.Common.GridColumnView>(), new ReportService.Models.Group.GroupView()
))

using System.Collections.Generic;
using ReportService.Models.Common;
using ReportService.Models.Group;

namespace ReportService.Models
{
public class GridPropertyView
{
public GridPropertyView() { }

    public GridPropertyView(HeaderTemplateView? headerTemplate, SortDescriptionView? sortingColumn,
         List<ColumnFilterView>? columnsFilters, List<Dictionary<string, string>>? customFooter,
         List<Dictionary<string, string>>? customHeader, 
         List<GridColumnView>? columnsProperties, GroupView? group)
    {
        HeaderTemplate = headerTemplate;
        SortingColumn = sortingColumn;
        ColumnsFilters = columnsFilters;
        CustomFooter = customFooter;
        CustomHeader = customHeader;
        ColumnsProperties = columnsProperties;
        Group = group;
    }

    public HeaderTemplateView? HeaderTemplate { get; set; }

    public SortDescriptionView? SortingColumn { get; set; }

    public List<ColumnFilterView>? ColumnsFilters { get; set; }

    public List<Dictionary<string, string>>? CustomFooter { get; set; }

    public List<Dictionary<string, string>>? CustomHeader { get; set; }

    public List<GridColumnView>? ColumnsProperties { get; set; }

    public GroupView? Group { get; set; }
}

}

using ModelLayer.Report.Grid.Common;

namespace ModelLayer.Report.Grid
{
public class GridPropertyView
{
public GridPropertyView() { }

    public GridPropertyView(HeaderTemplateView? headerTemplate, SortDescriptionView? sortingColumn,
         List<ColumnFilterView>? columnsFilters, List<Dictionary<string, string>>? customFooter,
         List<Dictionary<string, string>>? customHeader, HeaderGridPropertyView? headerGridPropertyView,
         List<GridColumnView>? columnsProperties, GroupView? group)
    {
        HeaderTemplate = headerTemplate;
        SortingColumn = sortingColumn;
        ColumnsFilters = columnsFilters;
        CustomFooter = customFooter;
        CustomHeader = customHeader;
        HeaderGridPropertyView = headerGridPropertyView;
        ColumnsProperties = columnsProperties;
        Group = group;
    }

    public HeaderTemplateView? HeaderTemplate { get; set; }

    public SortDescriptionView? SortingColumn { get; set; }

    public List<ColumnFilterView>? ColumnsFilters { get; set; }

    public List<Dictionary<string, string>>? CustomFooter { get; set; }

    public List<Dictionary<string, string>>? CustomHeader { get; set; }

    public HeaderGridPropertyView? HeaderGridPropertyView { get; set; }

    public List<GridColumnView>? ColumnsProperties { get; set; }

    public GroupView? Group { get; set; }
}

}

[vk-git-hub]

How to solve this problem? Remove then constructor with params? The problem isn't solved.

[DocSvartz]

@vk-git-hub try this https://www.nuget.org/packages/Mapster/10.0.6-a

[DocSvartz]

The problem was that the presence of a parameterless constructor is disabled ConstructUsing() and MapToConstructor()

[vk-git-hub]

How can I install this package from the VS2026? The latest available one is 10.0.5

[DocSvartz]

check include prerelease

[vk-git-hub]

After installing the 10.0.6-a package, the problem persists. The problem is not resolved.

[DocSvartz]

InvalidOperationException: No default constructor for type 'FilterCondition', please use 'ConstructUsing' or 'MapWith'

@vk-git-hub 'FilterCondition' - This is the name of a Type, not a property or constructor parameter. Are you sure you don't have a type with that name?

[vk-git-hub]

No, there isn't. I thought it was a sample - 'FilterCondition', my data source is a type - ModelLayer.Report.Grid.GridPropertyView, destination - ReportService.Models.GridPropertyView

[DocSvartz]

The exception is displayed exactly as you wrote: ?

InvalidOperationException: No default constructor for type 'FilterCondition', please use 'ConstructUsing' or 'MapWith'

[vk-git-hub]

Yes, that's right. That's exactly it.