Page Query Boss

Build complex nested queries containing multiple fields and pages and return an array that can be parsed to JSON. This is use-full to fetch data for SPA and PWA.

You can use the Module to tranfrom a ProcessWire Page or PageArray – even RepeaterMatrixPageArrays – into an array or JSON. Queries can be nested and contain closures as callback functions. Some field-types are transformed automatically, like Pageimages or MapMarker.

Release Updates

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Installation

Via ProcessWire Backend

It is recommended to install via the ProcessWire admin "Modules" > "Site" > "Add New" > "Add Module from Directory" using the PageQueryBoss class name.

Manually

Download the files from Github or the ProcessWire repository: https://modules.processwire.com/modules/page-query-builder/

Copy all of the files for this module into /site/modules/PageQueryBoss/
Go to “Modules > Refresh” in your admin, and then click “install” for the this module.

Methods

There are two main methods:

Return JSON

$page->pageQueryJson($query);

Return an Array

$page->pageQueryArray($query);

Building the query

The query can contain key and value pairs, or only keys. It can be nested and contain closures for dynamic values. To illustrate a short example:

// simple query:
$query = [
	'height',
	'floors',
];
$pages->find('template=skyscraper')->pageQueryJson($query);

Queries can be nested, contain page names, template names or contain functions and ProcessWire selectors:

// simple query:
$query = [
	'height',
	'floors',
	'images', // < some fileds contain default sub-queries to return data
	'files' => [ // but you can also overrdide these defaults:
		'filename'
		'ext',
		'url',
	],
	// Assuming there are child pages with the architec template, or a
	// field name with a page relation to architects
	'architect' => [ // sub-query
		'name',
		'email'
	],
	// queries can contain closure functions
	'querytime' => function($parent){
		return "Query for $parent->title was built ".time();
	}
];
$pages->find('template=skyscraper')->pageQueryJson($query);

Keys:

A single fieldname; height or floors or architects <br/> The Module can handle the following fields:
- Strings, Dates, Integer…
- Page references
- Pageimages
- Pagefiles
- PageArray
- MapMarker
- FieldtypeFunctional
A template name; skyscraper or city
Name of a child page (page.child.name=pagename); my-page-name
A ProcessWire selector; template=building, floors>=25

A new name for the returned index passed by a # delimiter:

 // the field skyscraper will be renamed to "building":
 $query = ["skyscraper`#building`"]

Key value pars:

Any of the keys above (1-5) with an new nested sub-query array:

 $query = [
 	'skyscraper' => [
 		'height',
 		'floors'
 	],
 	'architect' => [
 		'title',
 		'email'
 	],
 ]

A named key and a closure function to process and return a query. The closure gets the parent object as argument:

 $query = [
 	'architecs' => function($parent)
 		{
 			$architects = $parent->find('template=architect');
 			return $architects->arrayQuery(['name', 'email']);
 			// or return $architects->explode('name, email');
 		}
 ]

Real life example:

$query = [
	'title',
	'subtitle',
	// naming the key invitation
	'template=Invitation, limit=1#invitation' => [
		'title',
		'subtitle',
		'body',
	],
	// returns global speakers and local ones...
	'speakers' => function($page){
		$speakers = $page->speaker_relation;
		$speakers = $speakers->prepend(wire('pages')->find('template=Speaker, global=1, sort=-id'));

		// build a query of the speakers with
		return $speakers->arrayQuery([
			'title#name', // rename title field to name
			'subtitle#ministry', // rename subtitle field to ministry
			'links' => [
				'linklabel#label', // rename linklabel field to minlabelistry
				'link'
			],
		]);
	},
	// Child Pages with template=Program
	'Program' => [
		'title',
		'summary',
		'start' => function($parent){ // calculate the startdate from timetables
			return $parent->children->first->date;
		},
		'end' => function($parent){ // calculate the endate from timetables
			return $parent->children->last->date;
		},
		'Timetable' => [
			'date', // date
			'timetable#entry'=> [
				'time#start', // time
				'time_until#end', // time
				'subtitle#description', // entry title
			],
		],
	],
	// ProcessWire selector, selecting children > name result "location"
	'template=Location, limit=1#location' => [
		'title#city', // summary title field to city
		'body',
		'country',
		'venue',
		'summary#address', // rename summary field to address
		'link#tickets', // rename ticket link
		'map', // Mapmarker field, automatically transformed
		'images',
		'infos#categories' => [ // repeater matrix! > rename to categories
			'title#name', // rename title field to name
			'entries' => [ // nested repeater matrix!
				'title',
				'body'
			]
		],
	],
];

if ($input->urlSegment1 === 'json') {
	header('Content-type: application/json');
	echo $page->pageQueryJson($query);
	exit();
}

Module default settings

The modules settings are public. They can be directly modified, for example:

$modules->get('PageQueryBoss')->debug = true;
$modules->get('PageQueryBoss')->defaults = []; // reset all defaults

Default queries for fields:

Some field-types or templates come with default selectors, like Pageimages etc. These are the default queries:

// Access and modify default queries: $modules->get('PageQueryBoss')->defaults['queries'] = …
public $defaults = [
	'queries' => [
		'Pageimage' => [
			'basename',
			'url',
			'httpUrl',
			'description',
			'ext',
			'focus',
		],
		'Pageimages' => [
			'basename',
			'url',
			'httpUrl',
			'description',
			'ext',
			'focus',
		],
		'Pagefile' => [
			'basename',
			'url',
			'httpUrl',
			'description',
			'ext',
			'filesize',
			'filesizeStr',
			'hash',
		],
		'Pagefiles' => [
			'basename',
			'url',
			'httpUrl',
			'description',
			'ext',
			'filesize',
			'filesizeStr',
			'hash',
		],
		'MapMarker' => [
			'lat',
			'lng',
			'zoom',
			'address',
		],
		'User' => [
			'name',
			'email',
		],
	],
];

These defaults will only be used if there is no nested sub-query for the respective type. If you query a field with complex data and do not provide a sub-query, it will be transformed accordingly:

$page->pageQueryArry(['images']);

// returns something like this
'images' => [
	'basename',
	'url',
	'httpUrl',
	'description',
	'ext',
	'focus'=> [
		'top',
		'left',
		'zoom',
		'default',
		'str',
	]
];

You can always provide your own sub-query, so the defaults will not be used:

$page->pageQueryArry([
	'images' => [
		'filename',
		'description'
	],
]);

Overriding default queries:

You can also override the defaults, for example

$modules->get('PageQueryBoss')->defaults['queries']['Pageimages'] = [
	'basename',
	'url',
	'description',
];

Index of nested elements

The index for nested elements can be adjusted. This is also done with defaults. There are 3 possibilities:

Nested by name (default)
Nested by ID
Nested by nummerical index

Named index (default):

This is the default setting. If you have a field that contains sub-items, the name will be the key in the results:

// example
$pagesByName = [
	'page-1-name' => [
		'title' => "Page one title",
		'name' => 'page-1-name',
	],
	'page-2-name' => [
		'title' => "Page two title",
		'name' => 'page-2-name',
	]
]

ID based index:

If an object is listed in $defaults['index-id'] the id will be the key in the results. Currently, no items are listed as defaults for id-based index:

$modules->get('PageQueryBoss')->defaults['index-id']['Page'];
// example
$pagesById = [
	123 => [
		'title' => "Page one title",
		'name' => 123,
	],
	124 => [
		'title' => "Page two title",
		'name' => 124,
	]
]

Number based index

By default, a couple of fields are transformed automatically to contain numbered indexes:

// objects or template names that should use numerical indexes for children instead of names
$defaults['index-n'] => [
	'skyscraper', // template name
	'Pageimage',
	'Pagefile',
	'RepeaterMatrixPage',
];

// example
$images = [
	0 => [
		'filename' => "image1.jpg",
	],
	1 => [
		'filename' => "image2.jpg",
	]
]

Tipp: When you remove the key Pageimage from $defaults['index-n'], the index will again be name-based.

Helpfull closures & tipps

These are few helpfill closure functions you might want to use or could help as a starting point for your own (let me know if you have your own):

Get an overview of languages:

$query = ['languages' => function($page){
	$ar = [];
	$l=0;
	foreach (wire('languages') as $language) {
		// build the json url with segment 1
		$ar[$l]['url']= $page->localHttpUrl($language).wire('input')->urlSegment1;
		$ar[$l]['name'] = $language->name == 'default' ? 'en' : $language->name;
		$ar[$l]['title'] = $language->getLanguageValue($language, 'title');
		$ar[$l]['active'] = $language->id == wire('user')->language->id;
		$l++;
	}
	return $ar;
}];

Get county info from ContinentsAndCountries Module

Using the ContinentsAndCountries Module you can extract iso code and names for countries:

$query = ['country' => function($page){
	$c = wire('modules')->get('ContinentsAndCountries')->findBy('countries', array('name', 'iso', 'code'),['code' =>$page->country]);
	return count(

PageQueryBoss

Install / Use

README