---
title: "EXT:news_category_pid_constraint"
manual: "News system"
version: "main"
permalink: "https://docs.typo3.org/permalink/georgringer/news:newscategorypidconstraint@main"
source: "Addons/NewsCategoryPidConstraint/Index.rst"
rendered: "2026-09-23T19:24:09+00:00"
---

# EXT:news_category_pid_constraint {#newscategorypidconstraint}

This extension avoids duplicate content usage if the setting Single-view page for news from this category of a news category is used.

Furthermore this extension can be used as example to implement an event listener (TYPO3 11) or Signal Slots (TYPO3 10).

Details can be found at [https://github.com/georgringer/news_category_pid_constraint](https://github.com/georgringer/news_category_pid_constraint)

## Usage {#usage}

-   Use `composer req georgringer/news-category-pid-constraint`