What is the primary benefit of using Malli schemas in Metabase?

Malli schemas provide runtime data validation and clear documentation for API endpoints, ensuring that both incoming requests and outgoing responses conform to expected data structures.

Should I use standard Malli predicates like pos-int??

While standard predicates work, it is recommended to use the Metabase-specific 'ms' namespace (e.g., ms/PositiveInt) as they are better integrated with the platform's infrastructure.

Why shouldn't I use ms/TemporalString for response schemas?

Response schemas in Metabase validate before JSON serialization. Since the data contains raw Java Time objects at that stage, you should use :any instead of a string-based schema.

How do I handle optional query parameters with this skill?

The skill guides you to use the {:optional true} property within a Malli map, often combined with [:maybe ...] and :default values to ensure robust parameter handling.

Metabase Malli Schema Architect

Name: Metabase Malli Schema Architect
Author: metabase

bymetabase

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45,683

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Desarrollo de API

Streamlines the addition of Malli validation schemas to Metabase API endpoints using standardized patterns and best practices.

This skill empowers developers to efficiently implement Malli data validation within the Metabase Clojure codebase. It provides specialized guidance on defining schemas for route parameters, query strings, and request bodies, ensuring type safety and robust error handling across the application. Crucially, the skill accounts for Metabase's unique validation lifecycle—distinguishing between request-side string coercion and response-side Java object validation—to prevent common serialization pitfalls and maintain consistent API documentation.

Características Principales

0145,683 GitHub stars

02Handles complex parameter destructuring for route, query, and body data

03Optimizes response schemas for internal Clojure data structures and Java Time objects

04Generates standardized Malli schemas for Clojure-based API endpoints

05Configures contextual error messages for user-friendly validation failures

06Integrates Metabase-specific schema types from the internal ms namespace

Casos de Uso

01Ensuring consistent data types across Metabase warehouse and collection APIs

02Refactoring legacy Clojure endpoints to adopt modern Malli schema patterns

03Hardening new Metabase API endpoints with strict input and output validation

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add metabase/metabase add-malli-schemas

For use in Claude.ai and ChatGPT

Download Skill