Bump Foundatio.Mediator.Abstractions from 1.1.0 to 1.2.1

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Pinned Foundatio.Mediator.Abstractions at 1.2.1.

Release notes

Sourced from Foundatio.Mediator.Abstractions's releases.

1.2.1

Bug Fixes

• Fix compilation error in middleware-only projects — The source generator emitted using Foundatio.Mediator.Generated; unconditionally in _FoundatioModule, but that namespace only exists when handler wrapper types are generated. Projects containing only middleware (no handlers) failed with CS0234: The type or namespace name 'Generated' does not exist. The using directive is now conditionally emitted only when the project has at least one handler.
• Rename _FoundatioModule hint to .g.cs — The generated file now follows the .g.cs naming convention so test infrastructure properly validates it for compilation errors.

Full Changelog: FoundatioFx/Foundatio.Mediator@v1.2.0...v1.2.1

1.2.0

What's New

Endpoint Conventions & Customization

• IEndpointConvention<TBuilder> — New interface for compile-time endpoint customization via attributes. Convention attributes on methods, classes, or assemblies configure endpoint/group builders at startup without runtime reflection. Supports 3-level precedence with most-derived-wins deduplication (method overrides class overrides assembly). (#​176)
• Customizable result-to-HTTP mapping — New IMediatorResultMapper<TResult> interface allows overriding the default Result<T>-to-HTTP status code mapping in generated endpoints. Register a custom mapper before AddMediator() to override the defaults. (#​177)

Route Constraints

• Auto-generated route constraints — Route parameters now automatically include type constraints based on the message property type (e.g., {orderId:guid}, {itemId:long}, {widgetId:int}). Supported types: int, long, guid, bool, datetime, decimal, double, float. String parameters remain unconstrained.

Endpoint Attribute Improvements

• Route shorthand constructor — [HandlerEndpoint("{productId}")] instead of [HandlerEndpoint(Route = "{productId}")]
• Positional constructor — [HandlerEndpoint(HandlerMethod.Get, "/{productId}")] for concise explicit endpoint declarations
• HandlerMethod-only constructor — [HandlerEndpoint(HandlerMethod.Get)] for endpoints with no additional route segment beyond the group prefix
• [StringSyntax("Route")] annotation — Route parameters on [HandlerEndpoint] now have IDE route-completion support (with a netstandard2.0 polyfill)

"Make Endpoint Explicit" Code Fix

• New code fix for FMED017 — Offers "Make endpoint explicit" and "Make all endpoints in class explicit" actions that insert [HandlerEndpoint] and [HandlerEndpointGroup] attributes to freeze convention-based routes so they won't change across library versions

Breaking Changes

• EndpointHttpMethod renamed to HandlerMethod — The HTTP method enum used in endpoint attributes has been renamed for clarity
• HttpMethod property renamed to Method on HandlerEndpointAttribute
• RateLimitedAttribute renamed to EndpointRateLimiterAttribute — More consistent naming with the endpoint convention system

Bug Fixes

• Fix TrimStart char-array bug in TypeSymbolInfo.GetQualifiedName — TrimStart("global::".ToCharArray()) was stripping individual characters from the set instead of the prefix string, causing incorrect qualified names for types like long, bool, and object
• Support non-record message types in endpoint generation — GET/DELETE constructor-binding now uses object initializer syntax for class types instead of record-only named constructor args; skip [AsParameters] binding for zero-property message types
• Fix nullable warning in RetryMiddleware sample — GetPolicy() now falls back to the default policy when the named policy is not found

Documentation

• Added locking routes section and FMED017/FMED018 diagnostic documentation
• Added endpoint conventions section covering IEndpointConvention<T> interface, scoping, and deduplication
• Clarified that endpoint generation is opt-in
• Fixed XML docs on HandlerEndpointGroupAttribute and MediatorConfigurationAttribute

Dependencies

• Foundatio packages updated to 13.0.0
• Microsoft.SourceLink.GitHub 10.0.203
• .NET 10.0.7 package updates (BCL, AspNetCore, DI, Hosting, Diagnostics)
• Scalar.AspNetCore 2.14.6

Full Changelog: FoundatioFx/Foundatio.Mediator@v1.1.0...v1.2.0

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