.Net core Fluent validation accept empty 或 accept with given precision

Question

您好，我正在尝试使用流畅的验证来验证 .Net 核心中的一个小数字段。该字段可以为空，或者如果存在值，则它应该匹配精度 4,1。目前我已经试过了

this.RuleFor(x => x.MastHeight).NotNull().ScalePrecision(1, 4).When( x => x.MastHeight).NotEmpty();

以上代码不正确。我正在尝试执行以下规则的验证

Mast height cannot be null

Mast height may take empty

Mast height can take zero

If values present in mast height then it should follow precision 1,4

有人可以帮我编写包含上述规则的正确验证吗？任何帮助将不胜感激。谢谢

Answer 1

试试这个：

    RuleFor(p => p.MastHeight)
        .ScalePrecision(1, 4)
        .When(p => p.MastHeight != decimal.Zero && p.MastHeight.HasValue);

Answer 2

你不需要 .When( x => x.MastHeight).NotEmpty() - 它甚至不会编译 -

ScalePrecision(1,4) 表示您总共允许 4 位数字和 1 位小数，因此它将接受零（空小数点）而无需特殊规则。

public class MyType {
    public decimal? MastHeight { get; set; }
    public MyType(decimal? mastHeight) {
        MastHeight = mastHeight;
    }
}

public class MyTypeValidator : AbstractValidator<MyType> {
    public MyTypeValidator() {
        RuleFor(x => x.MastHeight).NotNull().ScalePrecision(1, 4);
    }
}

[Fact]
public void Decimal_Validation_Valid() {
    var decimals = new MyType[] {
        new MyType(default(decimal)),
        new MyType(1m),
        new MyType(1234m),
        new MyType(1.4m),
        new MyType(321.4m),
    };

    var validator = new MyTypeValidator();

    foreach (var value in decimals) {
        var validationResult = validator.Validate(value);
        Assert.True(validationResult.IsValid);
    }
}

[Fact]
public void Decimal_Validation_Invalid() {
    var decimals = new MyType[] {
        new MyType(null),
        new MyType(1.42m),
        new MyType(1111.4m),
    };

    var validator = new MyTypeValidator();

    foreach (var value in decimals) {
        var validationResult = validator.Validate(value);
        Assert.False(validationResult.IsValid);
    }
}

.Net core Fluent validation accept empty 或 accept with given precision

.Net core Fluent validation accept empty or accept with given precision

c#

.net-core

fluentvalidation