Queries

The Application Model provides comprehensive support for implementing queries in your backend application. Queries are used for retrieving data and are a key component of CQRS (Command Query Responsibility Segregation) architecture, offering powerful features like observability, validation, and flexible parameter handling.

Topics

Topic	Description
Controller based	How to implement queries using controller-based approach.
Model Bound	How to work with model-bound queries for simplified parameter handling.
Query Pipeline	Understanding the query pipeline and how queries are processed.
Authorization	How to use authorization attributes for role-based and policy-based authorization.
Validation	How to implement validation for query parameters.

💡 Query Filters: The query pipeline supports filters for cross-cutting concerns like validation and authorization. See the Query Pipeline section for details on built-in filters and creating custom ones.

💡 Frontend Integration: Automatically generate TypeScript proxies for your queries with the Proxy Generation feature.

Overview

Queries in the Application Model are designed to be flexible and powerful, supporting both traditional request-response patterns and reactive, observable queries that can provide real-time updates. The framework handles parameter validation, binding, and processing through a comprehensive pipeline that ensures consistent behavior across your application. Query arguments and parameter binding are covered within the controller-based and model-bound topics.