NestJS Pipes

When to Use This Skill

Use this skill when:

• Validating request data (body, query, params)
• Transforming input data (string to number, object schema)
• Parsing primitive types (int, float, boolean, UUID)
• Providing default values for optional parameters
• Sanitizing user input
• Implementing custom validation logic
• Stripping unwanted properties from DTOs
• Auto-transforming request payloads to class instances

What are Pipes?

Pipes are classes decorated with @Injectable() that implement the PipeTransform interface. They operate on the arguments being processed by a controller route handler and can:

• Transform input data to desired format
• Validate input data and throw exceptions if invalid