Class DomainError

Namespace: FunctionalDdd

Assembly: FunctionalDdd.RailwayOrientedProgramming.dll

Represents a domain or business rule violation. Use this for errors that occur when domain logic or business rules prevent an operation from completing. Maps to HTTP 422 Unprocessable Entity.

public sealed class DomainError : Error, IEquatable<Error>

Inheritance: object

Error

DomainError

Implements: IEquatable<Error>

Inherited Members: Error.Code

Error.Detail

Error.Instance

Error.Equals(Error)

Error.Equals(object)

Error.GetHashCode()

Error.ToString()

Error.Validation(string, string, string, string)

Error.Validation(ImmutableArray<ValidationError.FieldError>, string, string)

Error.Validation(ImmutableArray<ValidationError.FieldError>, string, string, string)

Error.BadRequest(string, string)

Error.Conflict(string, string)

Error.NotFound(string, string)

Error.Unauthorized(string, string)

Error.Forbidden(string, string)

Error.Unexpected(string, string)

Error.Domain(string, string)

Error.RateLimit(string, string)

Error.ServiceUnavailable(string, string)

Error.BadRequest(string, string, string)

Error.Conflict(string, string, string)

Error.NotFound(string, string, string)

Error.Unauthorized(string, string, string)

Error.Forbidden(string, string, string)

Error.Unexpected(string, string, string)

Error.Domain(string, string, string)

Error.RateLimit(string, string, string)

Error.ServiceUnavailable(string, string, string)

object.Equals(object, object)

object.GetType()

object.ReferenceEquals(object, object)

Extension Methods: MaybeExtensions.AsMaybe<T>(T)

MaybeExtensions.ToResult<TValue>(TValue)

NullableExtensions.ToResult<T>(T?, Error)

CombineErrorExtensions.Combine(Error?, Error)

Examples

// Business rule violations
Error.Domain("Cannot withdraw more than account balance")
Error.Domain("Minimum order quantity is 10 units")
Error.Domain("Cannot cancel order after shipment has begun")
Error.Domain("Discount percentage cannot exceed maximum allowed limit")

Remarks

This is distinct from validation errors (field-level data problems) and conflicts (state-based collisions). Domain errors represent semantic violations of business invariants that cannot be expressed as simple field validation.

Constructors

DomainError(string, string, string?)

Initializes a new instance of the DomainError class.

public DomainError(string detail, string code, string? instance = null)

Parameters