🪪 Category Validators

Category validators provide validation functions for category-related operations in Nodeblocks applications. These validators ensure data integrity and proper business logic validation for category operations.

---

🎯 Overview

Category validators are designed to:

• Validate category existence before operations
• Ensure data integrity in category workflows
• Provide reusable validation logic for category operations
• Support composition with other category blocks
• Handle error cases with proper error responses

---

📋 Category Validator Types

Existence Validators

Validators that check if categories exist in the database.

---

🔧 Available Category Validators

doesCategoryExist

Validates that a category exists in the database by checking the categoryId parameter.

Purpose: Ensures the requested category exists before proceeding with operations

Parameters:

• payload: RouteHandlerPayload containing context and params
• payload.context.db: Database connection with categories collection
• payload.params.requestParams.categoryId: Category ID to validate

Returns: void - Passes through if category exists

Throws: NodeblocksError (404) with message "Category does not exist" if category not found

Usage:

import { validators } from '@nodeblocks/backend-sdk';

const { doesCategoryExist } = validators;

withRoute({
  -- snip --
  validators: [doesCategoryExist]
});

---

🔗 Related Documentation

• Category Schemas - Category data validation and contracts
• Category Handlers - Category business logic functions
• Category Routes - Category HTTP endpoint definitions
• Category Features - Category composed features