為什么我在FluentValidationMustAsync中收到CS1061錯誤

我正在嘗試使用靜態擴展方法創建一些驗證規則，IRuleBuilderOptions因此在為創建和更新我的物件創建驗證器時，我不必不斷重復自己。

出于某種原因，我country.Id在MustAsync唯一檢查中不斷收到 CS1061 錯誤。我試過用括號和 替換箭頭函式return，試過async/ await。它們都會導致相同的錯誤。Intellisense 顯示它country是 type Country，并且Id是具有公共 getter 和 setter 的公共財產，所以我不確定我錯過了什么？我嘗試編譯，以防它只是 Intellisense 問題，但編譯失敗并出現相同的錯誤。

注意：使用 VS2022 / .Net6

public class Country
{
    public int Id { get; set; }
    public string Name { get; set; } = string.Empty;
    public string Code2 { get; set; } = string.Empty;
    public string Code3 { get; set; } = string.Empty;
    public int DisplayOrder { get; set; } = 1000;
    public bool Enabled { get; set; } = true;
}

public class CountryCreateValidator : AbstractValidator<Country>
{
    public CountryCreateValidator(IApplicationDbContext dbContext)
    {
        RuleFor(x => x.Name).Name(dbContext);
        RuleFor(x => x.Code2).Code2(dbContext);
        RuleFor(x => x.Code3).Code3(dbContext);
    }
}

public class CountryUpdateValidator : AbstractValidator<Country>
{
    public CountryUpdateValidator(IApplicationDbContext dbContext)
    {
        RuleFor(x => x.Id).NotEmpty();
        RuleFor(x => x.Name).Name(dbContext);
        RuleFor(x => x.Code2).Code2(dbContext);
        RuleFor(x => x.Code3).Code3(dbContext);
    }
}

public static class CountryRules
{
    public static IRuleBuilderOptions<Country, string> Name<Country>(this IRuleBuilder<Country, string> ruleBuilder, IApplicationDbContext dbContext) =>
        ruleBuilder.NotNull().NotEmpty().MaximumLength(64)
            .MustAsync((country, name, cancellationToken) =>
            {
                return dbContext.Countries.AllAsync(x => x.Id == country.Id /* error here */ || x.Name != name, cancellationToken);
            }).WithMessage(FvConstants.UNIQUE);

    public static IRuleBuilderOptions<Country, string> Code2<Country>(this IRuleBuilder<Country, string> ruleBuilder, IApplicationDbContext dbContext) =>
        ruleBuilder.NotEmpty().Length(2).Matches("^[A-Z]{2}$").WithMessage("{PropertyName} must be two uppercase letters")
            .MustAsync((country, code2, cancellationToken) =>
            {
                return dbContext.Countries.AllAsync(x => x.Id == country.Id || x.Code2 != code2, cancellationToken);
            }).WithMessage(FvConstants.UNIQUE);

    public static IRuleBuilderOptions<Country, string> Code3<Country>(this IRuleBuilder<Country, string> ruleBuilder, IApplicationDbContext dbContext) =>
        ruleBuilder.NotEmpty().Length(3).Matches("^[A-Z]{3}$").WithMessage("{PropertyName} must be three uppercase letters")
            .MustAsync((country, code3, cancellationToken) =>
            {
                return dbContext.Countries.AllAsync(x => x.Id == country.Id || x.Code3 != code3, cancellationToken);
            }).WithMessage(FvConstants.UNIQUE);
}

public class FvConstants
{
    public const string UNIQUE = "{PropertyName} must be unique";
}

這是一個螢屏截圖，顯示了正確鍵入country引數和我收到的錯誤...

uj5u.com熱心網友回復：

因為Country是您的方法的泛型引數的名稱，而不是型別名稱。只需<Country>從簽名中洗掉：

public static IRuleBuilderOptions<Country, string> Name(...
public static IRuleBuilderOptions<Country, string> Code2(...
public static IRuleBuilderOptions<Country, string> Code3(...

標籤：C＃ asp.net 流利验证 .net-6.0

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