/// <summary> /// Specifies a condition limiting when the validator should run. /// The validator will only be executed if the result of the lambda returns true. /// </summary> /// <param name="rule">The current rule</param> /// <param name="predicate">A lambda expression that specifies a condition for when the validator should run</param> /// <param name="applyConditionTo">Whether the condition should be applied to the current rule or all rules in the chain</param> /// <returns></returns> public static IRuleBuilderOptions <T, TProperty> When <T, TProperty>(this IRuleBuilderOptions <T, TProperty> rule, Func <T, ValidationContext <T>, bool> predicate, ApplyConditionTo applyConditionTo = ApplyConditionTo.AllValidators) { predicate.Guard("A predicate must be specified when calling When.", nameof(predicate)); // Default behaviour for When/Unless as of v1.3 is to apply the condition to all previous validators in the chain. return(rule.Configure(config => { config.ApplyCondition(ctx => predicate((T)ctx.InstanceToValidate, ValidationContext <T> .GetFromNonGenericContext(ctx.ParentContext)), applyConditionTo); })); }
/// <summary> /// Uses the Service Provider to inject the default validator for the property type. /// </summary> /// <param name="ruleBuilder"></param> /// <param name="callback"></param> /// <param name="ruleSets"></param> /// <typeparam name="T"></typeparam> /// <typeparam name="TProperty"></typeparam> /// <returns></returns> public static IRuleBuilderOptions <T, TProperty> InjectValidator <T, TProperty>(this IRuleBuilder <T, TProperty> ruleBuilder, Func <IServiceProvider, ValidationContext <T>, IValidator <TProperty> > callback, params string[] ruleSets) { var adaptor = new ChildValidatorAdaptor(context => { var actualContext = (PropertyValidatorContext)context; var serviceProvider = actualContext.ParentContext.GetServiceProvider(); var contextToUse = ValidationContext <T> .GetFromNonGenericContext(actualContext.ParentContext); var validator = callback(serviceProvider, contextToUse); return(validator); }, typeof(IValidator <TProperty>)); adaptor.RuleSets = ruleSets; return(ruleBuilder.SetValidator(adaptor)); }
/// <summary> /// Specifies an asynchronous condition limiting when the validator should run. /// The validator will only be executed if the result of the lambda returns true. /// </summary> /// <param name="rule">The current rule</param> /// <param name="predicate">A lambda expression that specifies a condition for when the validator should run</param> /// <param name="applyConditionTo">Whether the condition should be applied to the current rule or all rules in the chain</param> /// <returns></returns> public static IRuleBuilderOptions <T, TProperty> WhenAsync <T, TProperty>(this IRuleBuilderOptions <T, TProperty> rule, Func <T, ValidationContext <T>, CancellationToken, Task <bool> > predicate, ApplyConditionTo applyConditionTo = ApplyConditionTo.AllValidators) { predicate.Guard("A predicate must be specified when calling WhenAsync.", nameof(predicate)); // Default behaviour for When/Unless as of v1.3 is to apply the condition to all previous validators in the chain. Configurable(rule).ApplyAsyncCondition((ctx, ct) => predicate((T)ctx.InstanceToValidate, ValidationContext <T> .GetFromNonGenericContext(ctx), ct), applyConditionTo); return(rule); }