API:Kategorier

MediaWiki-version:

≥ 1.11

GET request to view categories associated with a page or pages.

This module can be used as a generator .

API dokumentation

prop=categories (cl)

(main | query | categories)

• This module requires read rights.
• This module can be used as a generator.
• Source: MediaWiki
• License: GPL-2.0-or-later

List all categories the pages belong to.

• https://www.mediawiki.org/wiki/Special:MyLanguage/API:Categories

Specific parameters:

Other general parameters are available.

clprop

Which additional properties to get for each category:

sortkey

Adds the sortkey (hexadecimal string) and sortkey prefix (human-readable part) for the category.

timestamp

Adds timestamp of when the category was added.

hidden

Tags categories that are hidden with __HIDDENCAT__.

Values (separate with | or alternative): hidden, sortkey, timestamp

clshow

Which kind of categories to show.

Values (separate with | or alternative): !hidden, hidden

cllimit

How many categories to return.

Type: integer or max

The value must be between 1 and 500.

Default: 10

clcontinue

When more results are available, use this to continue. More detailed information on how to continue queries can be found on mediawiki.org.

clcategories

Only list these categories. Useful for checking whether a certain page is in a certain category.

Separate values with | or alternative.

Maximum number of values is 50 (500 for clients that are allowed higher limits).

cldir

The direction in which to list.

One of the following values: ascending, descending

Default: ascending

Examples:

Get a list of categories the page Albert Einstein belongs to.

api.php?action=query&prop=categories&titles=Albert%20Einstein [open in sandbox]

Get information about all categories used in the page Albert Einstein.

api.php?action=query&generator=categories&titles=Albert%20Einstein&prop=info [open in sandbox]

Eksempel

GET request

GET request to view categories on a page.

api.php?action=query&format=json&titles=Janelle%20Monáe&prop=categories [try in ApiSandbox]

Svar

{
    "continue": {
        "clcontinue": "13828397|Afrofuturists",
        "continue": "||"
    },
    "query": {
        "pages": {
            "13828397": {
                "pageid": 13828397,
                "ns": 0,
                "title": "Janelle Mon\u00e1e",
                "categories": [
                    {
                        "ns": 14,
                        "title": "Category:1985 births"
                    },
                    {
                        "ns": 14,
                        "title": "Category:21st-century American actresses"
                    },
                    {
                        "ns": 14,
                        "title": "Category:21st-century American singers"
                    },
                    ...
                ]
            }
        }
    }
}

Sample code

Python

#!/usr/bin/python3

"""
    get_categories.py

    MediaWiki API Demos
    Demo of `Categories` module: Get categories associated with a page.

    MIT License
"""

import requests

S = requests.Session()

URL = "https://en.wikipedia.org/w/api.php"

PARAMS = {
    "action": "query",
    "format": "json",
    "prop": "categories",
    "titles": "Janelle Monáe"
}

R = S.get(url=URL, params=PARAMS)
DATA = R.json()

PAGES = DATA["query"]["pages"]

for k, v in PAGES.items():
    for cat in v['categories']:
        print(cat["title"])

PHP

<?php
/*
    get_categories.php

    MediaWiki API Demos
    Demo of `Categories` module: Get categories associated with a page.

    MIT License
*/

$endPoint = "https://en.wikipedia.org/w/api.php";
$params = [
    "action" => "query",
    "format" => "json",
    "prop" => "categories",
    "titles" => "Janelle Monáe"
];

$url = $endPoint . "?" . http_build_query( $params );

$ch = curl_init( $url );
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
$output = curl_exec( $ch );
curl_close( $ch );

$result = json_decode( $output, true );

foreach( $result["query"]["pages"] as $k => $v ) {
    foreach( $v["categories"] as $k => $v ) {
        echo( $v["title"] . "\n" );
    }
}

JavaScript

/*
    get_categories.js

    MediaWiki API Demos
    Demo of `Categories` module: Get categories associated with a page.

    MIT License
*/

var url = "https://en.wikipedia.org/w/api.php"; 

var params = {
    action: "query",
    format: "json",
    prop: "categories",
    titles: "Janelle Monáe"
};

url = url + "?origin=*";
Object.keys(params).forEach(function(key){url += "&" + key + "=" + params[key];});

fetch(url)
    .then(function(response){return response.json();})
    .then(function(response) {
        var pages = response.query.pages;
        for (var p in pages) {
            for (var cat of pages[p].categories) {
                console.log(cat.title);
            }
        }
    })
    .catch(function(error){console.log(error);});

MediaWiki JS

/*
	get_categories.js

	MediaWiki API Demos
	Demo of `Categories` module: Get categories associated with a page.

	MIT License
*/

var params = {
		action: 'query',
		format: 'json',
		prop: 'categories',
		titles: 'Janelle Monáe'
	},
	api = new mw.Api();

api.get( params ).done( function ( data ) {
	var pages = data.query.pages,
		p;
	for ( p in pages ) {
		pages[ p ].categories.forEach( function ( cat ) {
			console.log( cat.title );
		} );
	}
} );

Mulige fejl

Kode	Information
clshow	Incorrect parameter - mutually exclusive values may not be supplied.

Parameterhistorik

• v1.20: Introducerede cldir
• v1.16: Introducerede clprop=hidden
• v1.15: Introducerede clcategories
• v1.14: Introducerede clshow
• v1.13: Introducerede clcontinue, cllimit, clprop=timestamp

Se også

• API:Categorymembers - lists pages which are members of a certain category.
• API:Allpages - lists all pages fitting a certain criteria; it can also access the category namespace .
• API:Allcategories - a list module that gets categories from across the entire wiki, based on certain criteria relating to the category title.