[英]Automapper - ignoring mapping based on source property child item
以下是我的來源類型。 在這種情況下,當成分為null或Count()== 0時,如何忽略Pizza元素的映射?
class Menu
{
public Pizza[] Pizzas { get; set; }
}
class Pizza
{
public string Name { get; set; }
public Ingredient[] Ingredients { get; set; }
}
class Ingredient
{
public int Id { get; set; }
public string Name { get; set; }
}
CreateMap<Menu, MenuVM>();
CreateMap<Pizza PizzaVM>();
CreateMap<Ingredient, IngredientVM>();
如果您想返回“忽略”,則可以執行以下操作(建議):
Mapper.CreateMap<Pizza, PizzaVM>()
.ForMember(dest => dest.Ingredients, opt => opt.Condition(source => string.IsNullOrEmpty(src.Ingredients) || src.Ingredients.Count() == 0))
否則,您可以像下面那樣創建ValueResolver,但是您需要將true / false結果存儲在新字段中:
public class PizzaIngredientResolver : ValueResolver<Pizza, bool>
{
protected override bool ResolveCore(Pizza src)
{
return !string.IsNullOrEmpty(src.Ingredients) && src.Ingredients.Count() != 0;
}
}
然后,您需要調用MappingConfiguration:
.ForMember(dest => dest.IsIngredientVisible, opts => opts.ResolveUsing<PizzaIngredientResolver>())
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