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API:Categorymembers

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MediaWiki version:
≥ 1.11

GET request to list pages that belong to a given category.

API documentation

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The following documentation is the output of Special:ApiHelp/query+categorymembers, automatically generated by the pre-release version of MediaWiki that is running on this site (MediaWiki.org).

list=categorymembers (cm)

(main | query | categorymembers)
  • This module requires read rights.
  • This module can be used as a generator.
  • Source: MediaWiki
  • License: GPL-2.0-or-later

List all pages in a given category.

Specific parameters:
Other general parameters are available.
cmtitle

Which category to enumerate (required). Must include the Category: prefix. Cannot be used together with cmpageid.

cmpageid

Page ID of the category to enumerate. Cannot be used together with cmtitle.

Type: integer
cmprop

Which pieces of information to include:

ids
Adds the page ID.
title
Adds the title and namespace ID of the page.
sortkey
Adds the sortkey used for sorting in the category (hexadecimal string).
sortkeyprefix
Adds the sortkey prefix used for sorting in the category (human-readable part of the sortkey).
type
Adds the type that the page has been categorised as (page, subcat or file).
timestamp
Adds the timestamp of when the page was included.
Values (separate with | or alternative): ids, sortkey, sortkeyprefix, timestamp, title, type
Default: ids|title
cmnamespace

Only include pages in these namespaces. Note that cmtype=subcat or cmtype=file may be used instead of cmnamespace=14 or 6.

Note: Due to miser mode, using this may result in fewer than cmlimit results returned before continuing; in extreme cases, zero results may be returned.

Values (separate with | or alternative): 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 90, 91, 92, 93, 100, 101, 102, 103, 104, 105, 106, 107, 710, 711, 828, 829, 1198, 1199, 1728, 1729, 2600, 5500, 5501
To specify all values, use *.
cmtype

Which type of category members to include. Ignored when cmsort=timestamp is set.

Values (separate with | or alternative): file, page, subcat
Default: page|subcat|file
cmcontinue

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

cmlimit

The maximum number of pages to return.

Type: integer or max
The value must be between 1 and 500.
Default: 10
cmsort

Property to sort by.

One of the following values: sortkey, timestamp
Default: sortkey
cmdir

In which direction to sort.

One of the following values: asc, ascending, desc, descending, newer, older
Default: ascending
cmstart

Timestamp to start listing from. Can only be used with cmsort=timestamp.

Type: timestamp (allowed formats)
cmend

Timestamp to end listing at. Can only be used with cmsort=timestamp.

Type: timestamp (allowed formats)
cmstarthexsortkey

Sortkey to start listing from, as returned by cmprop=sortkey. Can only be used with cmsort=sortkey.

cmendhexsortkey

Sortkey to end listing at, as returned by cmprop=sortkey. Can only be used with cmsort=sortkey.

cmstartsortkeyprefix

Sortkey prefix to start listing from. Can only be used with cmsort=sortkey. Overrides cmstarthexsortkey.

cmendsortkeyprefix

Sortkey prefix to end listing before (not at; if this value occurs it will not be included!). Can only be used with cmsort=sortkey. Overrides cmendhexsortkey.

cmstartsortkey
Deprecated.

Use cmstarthexsortkey instead.

cmendsortkey
Deprecated.

Use cmendhexsortkey instead.

Example 1: List twenty pages in a category

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GET request

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Response

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Response
{
"api":{
"query-continue":{
"categorymembers":{
"_cmcontinue":"subcat|44594e414d494353|10998823"
}
},
"query":{
"categorymembers":{
"cm":[
{
"_pageid":"22688097",
"_ns":"0",
"_title":"Branches of physics"
},
{
"_pageid":"3445246",
"_ns":"0",
"_title":"Glossary of classical physics"
},
{
"_pageid":"24489",
"_ns":"0",
"_title":"Outline of physics"
},
...
]
}
}
}
}

Sample code

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get_category_items.py

Python

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#!/usr/bin/python3
"""
 get_category_items.py
 MediaWiki API Demos
 Demo of `Categorymembers` module : List twenty items in a category
 MIT License
"""
importrequests
S = requests.Session()
URL = "https://en.wikipedia.org/w/api.php"
PARAMS = {
 "action": "query",
 "cmtitle": "Category:Physics",
 "cmlimit": "20",
 "list": "categorymembers",
 "format": "json"
}
R = S.get(url=URL, params=PARAMS)
DATA = R.json()
PAGES = DATA['query']['categorymembers']
for page in PAGES:
 print(page['title'])

PHP

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<?php
/*
 get_category_items.php
 MediaWiki API Demos
 Demo of `Categorymembers` module : List twenty items in a category
 MIT License
*/
$endPoint = "https://en.wikipedia.org/w/api.php";
$params = [
 "action" => "query",
 "list" => "categorymembers",
 "cmtitle" => "Category:Physics",
 "cmlimit" => "20",
 "format" => "json"
];
$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"]["categorymembers"] as $pages ){
 echo( $pages["title"] . "\n" );
}

JavaScript

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/*
 get_category_items.js
 MediaWiki API Demos
 Demo of `Categorymembers` module : List twenty items in a category
 MIT License
*/
varurl="https://en.wikipedia.org/w/api.php";
varparams={
action:"query",
list:"categorymembers",
cmtitle:"Category:Physics",
cmlimit:"20",
format:"json"
};
url=url+"?origin=*";
Object.keys(params).forEach(function(key){url+="&"+key+"="+params[key];});
fetch(url)
.then(function(response){returnresponse.json();})
.then(function(response){
varpages=response.query.categorymembers;
for(varpageinpages){
console.log(pages[page].title);
}
})
.catch(function(error){console.log(error);});

MediaWiki JS

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/*
	get_category_items.js
	MediaWiki API Demos
	Demo of `Categorymembers` module : List twenty items in a category
	MIT License
*/
varparams={
action:'query',
list:'categorymembers',
cmtitle:'Category:Physics',
cmlimit:'20',
format:'json'
},
api=newmw.Api();
api.get(params).done(function(data){
varpages=data.query.categorymembers,
page;
for(pageinpages){
console.log(pages[page].title);
}
});

Example 2: Get the ten articles most recently added to a category

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GET request

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Response

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Response
{
"api":{
"query-continue":{
"categorymembers":{
"_cmcontinue":"Magnetic levitation|"
}
},
"query":{
"categorymembers":{
"cm":[
{
"_pageid":"1653925",
"_ns":"100",
"_title":"Portal:Physics"
},
{
"_pageid":"22939",
"_ns":"0",
"_title":"Physics"
},
{
"_pageid":"3445246",
"_ns":"0",
"_title":"Glossary of classical physics"
},
...
]
}
}
}
}

Sample code

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get_recent_category_items.py


Python

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#!/usr/bin/python3
"""
 get_recent_category_items.py
 MediaWiki API Demos
 Demo of `Categorymembers` module : Get the ten articles most recently added to a category
 MIT License
"""
importrequests
S = requests.Session()
URL = "https://en.wikipedia.org/w/api.php"
PARAMS = {
 "cmdir": "desc",
 "format": "json",
 "list": "categorymembers",
 "action": "query",
 "cmtitle": "Category:Physics",
 "cmsort": "timestamp"
}
R = S.get(url=URL, params=PARAMS)
DATA = R.json()
PAGES = DATA["query"]["categorymembers"]
for page in PAGES:
 print(page["title"])

PHP

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<?php
/*
 get_recent_category_items.php
 MediaWiki API Demos
 Demo of `Categorymembers` module : Get the ten articles most recently added to a category
 MIT License
*/
$endPoint = "https://en.wikipedia.org/w/api.php";
$params = [
 "action" => "query",
 "list" => "categorymembers",
 "cmtitle" => "Category:Physics",
 "cmsort" => "timestamp",
 "cmdir" => "desc",
 "format" => "json"
];
$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"]["categorymembers"] as $page ) {
 echo( $page["title"] . "\n" );
}

JavaScript

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/*
 get_recent_category_items.js
 MediaWiki API Demos
 Demo of `Categorymembers` module : Get the ten articles most recently added to a category
 MIT License
*/
varurl="https://en.wikipedia.org/w/api.php";
varparams={
action:"query",
list:"categorymembers",
cmtitle:"Category:Physics",
cmsort:"timestamp",
cmdir:"desc",
format:"json"
};
url=url+"?origin=*";
Object.keys(params).forEach(function(key){url+="&"+key+"="+params[key];});
fetch(url)
.then(function(response){returnresponse.json();})
.then(function(response){
varpages=response.query.categorymembers;
for(varpageinpages){
console.log(pages[page].title);
}
})
.catch(function(error){console.log(error);});

MediaWiki JS

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/*
	get_recent_category_items.js
	MediaWiki API Demos
	Demo of `Categorymembers` module : Get the ten articles most recently added to a category
	MIT License
*/
varparams={
action:'query',
list:'categorymembers',
cmtitle:'Category:Physics',
cmsort:'timestamp',
cmdir:'desc',
format:'json'
},
api=newmw.Api();
api.get(params).done(function(data){
varpages=data.query.categorymembers,
page;
for(pageinpages){
console.log(pages[page].title);
}
});

Example 3: Get ten subcategories of a category

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GET request

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Response

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Response
{
"api":{
"query-continue":{
"categorymembers":{
"_cmcontinue":"subcat|57494b4950454449412050454f504c45|41491664"
}
},
"query":{
"categorymembers":{
"cm":[
{
"_pageid":"1458692",
"_ns":"14",
"_title":"Category:Wikipedias by language"
},
{
"_pageid":"22918730",
"_ns":"14",
"_title":"Category:Books about Wikipedia"
},
{
"_pageid":"16957584",
"_ns":"14",
"_title":"Category:Critics of Wikipedia"
},
...
]
}
}
}
}

The next subcategories (if there're more than 10) can be continued using the cmcontinue parameter from the response above.

Sample code

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get_subcategories.py


Python

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#!/usr/bin/python3
"""
 get_subcategories.py
 MediaWiki API Demos
 Demo of `Categorymembers` module : Get ten subcategories of a category
 MIT License
"""
importrequests
S = requests.Session()
URL = "https://en.wikipedia.org/w/api.php"
PARAMS = {
 "action": "query",
 "cmtitle": "Category:Wikipedia",
 "cmtype": "subcat",
 "list": "categorymembers",
 "format": "json"
}
R = S.get(url=URL, params=PARAMS)
DATA = R.json()
PAGES = DATA["query"]["categorymembers"]
for page in PAGES:
 print(page["title"])

PHP

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<?php
/*
 get_subcategories.php
 MediaWiki API Demos
 Demo of `Categorymembers` module : Get ten subcategories of a category
 MIT License
*/
$endPoint = "https://en.wikipedia.org/w/api.php";
$params = [
 "action" => "query",
 "list" => "categorymembers",
 "cmtitle" => "Category:Wikipedia",
 "cmtype" => "subcat",
 "format" => "json"
];
$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"]["categorymembers"] as $cat ) {
 echo( $cat["title"] . "\n");
}

JavaScript

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/*
 get_subcategories.js
 MediaWiki API Demos
 Demo of `Categorymembers` module : Get ten subcategories of a category
 MIT License
*/
varurl="https://en.wikipedia.org/w/api.php";
varparams={
action:"query",
list:"categorymembers",
cmtitle:"Category:Wikipedia",
cmtype:"subcat",
format:"json"
};
url=url+"?origin=*";
Object.keys(params).forEach(function(key){url+="&"+key+"="+params[key];});
fetch(url)
.then(function(response){returnresponse.json();})
.then(function(response){
varcategory=response.query.categorymembers;
for(varcatincategory){
console.log(category[cat].title);
}
})
.catch(function(error){console.log(error);});

MediaWiki JS

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/*
	get_subcategories.js
	MediaWiki API Demos
	Demo of `Categorymembers` module : Get ten subcategories of a category
	MIT License
*/
varparams={
action:'query',
list:'categorymembers',
cmtitle:'Category:Wikipedia',
cmtype:'subcat',
format:'json'
},
api=newmw.Api();
api.get(params).done(function(data){
varcategory=data.query.categorymembers,
cat;
for(catincategory){
console.log(category[cat].title);
}
});

Possible errors

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Code Info
cmnotitle The parameter cmtitle is required.
cminvalidcategory The category name you entered is not valid.
cmbadcontinue Invalid continue param. You should pass the original value returned by the previous query.

Parameter history

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  • v1.24: Deprecated cmstartsortkey, cmendsortkey
  • v1.18: Introduced cmstartsortkeyprefix, cmendsortkeyprefix
  • v1.17: Introduced sortkeyprefix, type
  • v1.14: Introduced cmstartsortkey, cmendsortkey
  • v1.12: Introduced cmtype,cmstart, cmend, cmdir

See also

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AltStyle によって変換されたページ (->オリジナル) /