[英]GraphQL HotChocolate no compatible constructor find for input type
This is the exception being raised:这是引发的异常:
I goes it has something to do with not being able to resolve my base class.我认为这与无法解析我的基类有关。
public class Project : BaseEntity<ProjectId>
{
public string Name { get; private set; }
public string Description { get; private set; }
private List<Asset> _assets = new();
public IReadOnlyList<Asset> Assets => _assets;
public Project(ProjectId id, string name, string description)
{
Id = id;
Name = name;
Description = description;
Validate();
}
...
}
Here is my Base:这是我的基地:
public abstract class BaseEntity<TId>
{
public TId Id { get; set; }
public ValidationResult ValidationResult { get; set; }
public bool IsValid => ValidationResult?.IsValid ?? Validate();
protected abstract bool Validate();
protected bool RunValidation<TValidator, TEntity>(TEntity entity, TValidator validator)
where TValidator : AbstractValidator<TEntity>
where TEntity : BaseEntity<TId>
{
ValidationResult = validator.Validate(entity);
return IsValid;
}
And this is how I registered the services.这就是我注册服务的方式。
builder.Services
.AddGraphQLServer()
.AddQueryType<ProjectQueries>()
.AddType<ProjectType>();
And the object type和对象类型
public class ProjectType : ObjectType<Project>, IViewModel
{
protected override void Configure(IObjectTypeDescriptor<Project> descriptor)
{
descriptor
.Field(p => p.Id)
.Description("Unique ID for the project.");
descriptor
.Field(p => p.Name)
.Description("Represents the name for the project.");
}
Is there something I'm missing?有什么我想念的吗?
If a type is used as an input object you need to make sure that either properties are settable or that you have a constructor that allows the deserializer to set the properties.如果将类型用作输入对象,则需要确保属性可设置或具有允许反序列化器设置属性的构造函数。
In your specific case you have a computed property:在您的特定情况下,您有一个计算属性:
public bool IsValid => ValidationResult?.IsValid ?? Validate();
You can either ignore that property with an attribute or you can provide a fluent type definition that ignores that property for inputs.您可以使用属性忽略该属性,也可以提供一个流畅的类型定义,忽略该属性的输入。
Attribute:属性:
[GraphQLIgnore]
public bool IsValid => ValidationResult?.IsValid ?? Validate();
Fluent:流利:
public class ProjectInputType : InputObjectType<Project>
{
protected override void Configure(IInputObjectTypeDescriptor<Project> descriptor)
{
// make sure to ignore all unusable props here that are public.
descriptor.Ignore(t => t.IsValid);
descriptor.Ignore(t => Assets);
}
}
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