PosInformatique.Foundations.People.FluentValidation

Introduction

This package provides FluentValidation extensions for validating first names and last names using the FirstName and LastName value objects from PosInformatique.Foundations.People.

It simplifies the integration of robust name validation into your FluentValidation rules, ensuring that string properties conform to the defined business rules for first and last names.

Install

You can install the package from NuGet:

dotnet add package PosInformatique.Foundations.People.FluentValidation

Features

• FluentValidation extension for first name and last name validation based on the business rules of the PosInformatique.Foundations.People package.
• Uses the same parsing and validation rules as the FirstName and LastName value objects
• Clear and consistent error messages

null values are accepted (combine with NotNull() validator to forbid nulls)

Use cases

• Validation: Ensure that user inputs for first and last names adhere to your domain's business rules.
• Type safety: Leverage the strong typing of FirstName and LastName within your validation logic.
• Consistency: Apply a single, robust name validation logic across all projects using FluentValidation.

Examples

Validating FirstName

public class PersonValidator : AbstractValidator<Person> { public PersonValidator() { // FirstName must be a valid FirstName (e.g., "John", "Jean-Pierre") // Null values are allowed by default. Use NotNull() to disallow. RuleFor(x => x.FirstName).MustBeFirstName(); // Example with NotNull() RuleFor(x => x.FirstName) .NotNull() .MustBeFirstName(); } } public class Person { public string? FirstName { get; set; } public string? LastName { get; set; } } // Usage var validator = new PersonValidator(); // Valid var result1 = validator.Validate(new Person { FirstName = "John", LastName = "DOE" }); // IsValid: true // Invalid (contains invalid character) var result2 = validator.Validate(new Person { FirstName = "John_123", LastName = "DOE" }); // IsValid: false // Invalid (too long) var result3 = validator.Validate(new Person { FirstName = new string('A', 51), LastName = "DOE" }); // IsValid: false // Null (valid by default for MustBeFirstName) var result4 = validator.Validate(new Person { FirstName = null, LastName = "DOE" }); // IsValid: true // Null (invalid if NotNull() is used) var validatorNotNull = new PersonValidator(); validatorNotNull.RuleFor(x => x.FirstName).NotNull().MustBeFirstName(); var result5 = validatorNotNull.Validate(new Person { FirstName = null, LastName = "DOE" }); // IsValid: false

Validating LastName

public class PersonValidator : AbstractValidator<Person> { public PersonValidator() { // LastName must be a valid LastName (e.g., "DOE", "SMITH-JOHNSON") // Null values are allowed by default. Use NotNull() to disallow. RuleFor(x => x.LastName).MustBeLastName(); // Example with NotNull() RuleFor(x => x.LastName) .NotNull() .MustBeLastName(); } } public class Person { public string? FirstName { get; set; } public string? LastName { get; set; } } // Usage var validator = new PersonValidator(); // Valid var result1 = validator.Validate(new Person { FirstName = "John", LastName = "DOE" }); // IsValid: true // Invalid (contains invalid character) var result2 = validator.Validate(new Person { FirstName = "John", LastName = "DOE_123" }); // IsValid: false // Invalid (too long) var result3 = validator.Validate(new Person { FirstName = "John", LastName = new string('A', 51) }); // IsValid: false // Null (valid by default for MustBeLastName) var result4 = validator.Validate(new Person { FirstName = "John", LastName = null }); // IsValid: true // Null (invalid if NotNull() is used) var validatorNotNull = new PersonValidator(); validatorNotNull.RuleFor(x => x.LastName).NotNull().MustBeLastName(); var result5 = validatorNotNull.Validate(new Person { FirstName = "John", LastName = null }); // IsValid: false

Links

• NuGet package: People.FluentValidation
• NuGet package: People (core library)
• Source code
• FluentValidation