DibiFluentDataSource::getAggregationData() - Code Metrics - Inspection of "Datagrid aggreggation functions row" - ublaboo/datagrid - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#375)

by Dalibor

created 2016-11-02 21:57 UTC

DibiFluentDataSource::getAggregationData() A

↳ Parent: DibiFluentDataSource

Complexity

Conditions	2
Paths	2

Size

Total Lines	8
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	8
rs	9.4285
c	0
b	0
f	0
cc	2
eloc	5
nc	2
nop	0

<?php

/**
 * @copyright   Copyright (c) 2015 ublaboo <[email protected]>
 * @author      Pavel Janda <[email protected]>
 * @package     Ublaboo
 */

namespace Ublaboo\DataGrid\DataSource;

use DibiFluent;
use Nette\Utils\Strings;
use Ublaboo\DataGrid\Filter;
use Ublaboo\DataGrid\Utils\Sorting;
use Dibi;

class DibiFluentDataSource extends FilterableDataSource implements IDataSource
{

	/**
	 * @var Dibi\Fluent
	 */
	protected $data_source;

	/**
	 * @var Dibi\Fluent
	 */
	protected $aggregation_data_source;

	/**
	 * @var array
	 */
	protected $data = [];

	/**
	 * @var string
	 */
	protected $primary_key;

	/**
	 * @var bool
	 */
	protected $hasAggregationFunctions = FALSE;


	/**
	 * @param Dibi\Fluent $data_source
	 * @param string $primary_key
	 */
	public function __construct(Dibi\Fluent $data_source, $primary_key)
	{
		$this->data_source = $data_source;
		$this->aggregation_data_source = $data_source->getConnection();

		$this->primary_key = $primary_key;
	}


	/********************************************************************************
	 *                          IDataSource implementation                          *
	 ********************************************************************************/


	/**
	 * Get count of data
	 * @return int
	 */
	public function getCount()
	{
		return $this->data_source->count();
	}


	/**
	 * Get the data
	 * @return array
	 */
	public function getData()
	{
		return $this->data ?: $this->data_source->fetchAll();
	}


	/**
	 * Filter data - get one row
	 * @param array $condition
	 * @return static
	 */
	public function filterOne(array $condition)
	{
		$this->data_source->where($condition)->limit(1);

		return $this;
	}


	/**
	 * Filter by date
	 * @param  Filter\FilterDate $filter
	 * @return void
	 */
	public function applyFilterDate(Filter\FilterDate $filter)

	{
		$conditions = $filter->getCondition();

		$date = \DateTime::createFromFormat($filter->getPhpFormat(), $conditions[$filter->getColumn()]);

		$this->data_source->where('DATE(%n) = ?', $filter->getColumn(), $date->format('Y-m-d'));

	}


	/**
	 * Filter by date range
	 * @param  Filter\FilterDateRange $filter
	 * @return void
	 */
	public function applyFilterDateRange(Filter\FilterDateRange $filter)
	{
		$conditions = $filter->getCondition();

		$value_from = $conditions[$filter->getColumn()]['from'];
		$value_to   = $conditions[$filter->getColumn()]['to'];

		if ($value_from) {
			$date_from = \DateTime::createFromFormat($filter->getPhpFormat(), $value_from);
			$date_from->setTime(0, 0, 0);

			$this->data_source->where('DATE(%n) >= ?', $filter->getColumn(), $date_from);

		}

		if ($value_to) {
			$date_to = \DateTime::createFromFormat($filter->getPhpFormat(), $value_to);
			$date_to->setTime(23, 59, 59);

			$this->data_source->where('DATE(%n) <= ?', $filter->getColumn(), $date_to);

		}
	}


	/**
	 * Filter by range
	 * @param  Filter\FilterRange $filter
	 * @return void
	 */
	public function applyFilterRange(Filter\FilterRange $filter)
	{
		$conditions = $filter->getCondition();

		$value_from = $conditions[$filter->getColumn()]['from'];
		$value_to   = $conditions[$filter->getColumn()]['to'];

		if ($value_from || $value_from != '') {
			$this->data_source->where('%n >= ?', $filter->getColumn(), $value_from);

		}

		if ($value_to || $value_to != '') {
			$this->data_source->where('%n <= ?', $filter->getColumn(), $value_to);

		}
	}


	/**
	 * Filter by keyword
	 * @param  Filter\FilterText $filter
	 * @return void
	 */
	public function applyFilterText(Filter\FilterText $filter)
	{
		$condition = $filter->getCondition();
		$or = [];

		foreach ($condition as $column => $value) {
			$column = Dibi\Helpers::escape(
				$this->data_source->getConnection()->getDriver(),
				$column,
				\dibi::IDENTIFIER
			);

			if ($filter->isExactSearch()) {
				$this->data_source->where("$column = %s", $value);

				continue;
			}

			if ($filter->hasSplitWordsSearch() === FALSE) {

				$words = [$value];
			} else {
				$words = explode(' ', $value);
			}

			foreach ($words as $word) {
				$escaped = $this->data_source->getConnection()->getDriver()->escapeLike($word, 0);

				if (preg_match("/[\x80-\xFF]/", $escaped)) {
					$or[] = "$column LIKE $escaped COLLATE utf8_bin";
				} else {
					$escaped = Strings::toAscii($escaped);
					$or[] = "$column LIKE $escaped COLLATE utf8_general_ci";
				}
			}
		}

		if (sizeof($or) > 1) {
			$this->data_source->where('(%or)', $or);

		} else {
			$this->data_source->where($or);
		}
	}


	/**
	 * Filter by multi select value
	 * @param  Filter\FilterMultiSelect $filter
	 * @return void
	 */
	public function applyFilterMultiSelect(Filter\FilterMultiSelect $filter)
	{
		$condition = $filter->getCondition();
		$values = $condition[$filter->getColumn()];
		$or = [];
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}

		if (sizeof($values) > 1) {
			$value1 = array_shift($values);
			$length = sizeof($values);
			$i = 1;

			$this->data_source->where('(%n = ?', $filter->getColumn(), $value1);


			foreach ($values as $value) {
				if ($i == $length) {
					$this->data_source->or('%n = ?)', $filter->getColumn(), $value);
				} else {
					$this->data_source->or('%n = ?', $filter->getColumn(), $value);
				}

				$i++;
			}
		} else {
			$this->data_source->where('%n = ?', $filter->getColumn(), reset($values));

		}
	}


	/**
	 * Filter by select value
	 * @param  Filter\FilterSelect $filter
	 * @return void
	 */
	public function applyFilterSelect(Filter\FilterSelect $filter)
	{
		$this->data_source->where($filter->getCondition());
	}


	/**
	 * Apply limit and offset on data
	 * @param int $offset
	 * @param int $limit
	 * @return static
	 */
	public function limit($offset, $limit)
	{
		$this->data = $this->data_source->fetchAll($offset, $limit);

		return $this;
	}


	/**
	 * Sort data
	 * @param  Sorting $sorting
	 * @return static
	 */
	public function sort(Sorting $sorting)
	{
		if (is_callable($sorting->getSortCallback())) {
			call_user_func(
				$sorting->getSortCallback(),
				$this->data_source,
				$sorting->getSort()
			);

			return $this;
		}

		$sort = $sorting->getSort();

		if (!empty($sort)) {
			$this->data_source->removeClause('ORDER BY');
			$this->data_source->orderBy($sort);
		} else {
			/**
			 * Has the statement already a order by clause?
			 */
			$this->data_source->clause('ORDER BY');

			$reflection = new \ReflectionClass('DibiFluent');
			$cursor_property = $reflection->getProperty('cursor');
			$cursor_property->setAccessible(TRUE);
			$cursor = $cursor_property->getValue($this->data_source);

			if (!$cursor) {
				$this->data_source->orderBy($this->primary_key);
			}
		}

		return $this;
	}

	/**
	 * @param string $aggregation_type
	 * @param string $column
	 */
	public function addAggregationColumn($aggregation_type, $column)
	{
		$this->aggregation_data_source = $this->aggregation_data_source->select($aggregation_type .'(%n)', $column)->as($column);

	}


	/**
	 * @return array|Dibi\Row|FALSE
	 */
	public function getAggregationData()
	{
		if ($this->hasAggregationFunctions) {
			return FALSE;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
		}
		$data = $this->aggregation_data_source->from($this->data_source)->as('data')->fetch();
		return $data;
	}
}


1		<?php
2
3		/**
4		* @copyright Copyright (c) 2015 ublaboo <[email protected]>
5		* @author Pavel Janda <[email protected]>
6		* @package Ublaboo
7		*/
8
9		namespace Ublaboo\DataGrid\DataSource;
10
11		use DibiFluent;
12		use Nette\Utils\Strings;
13		use Ublaboo\DataGrid\Filter;
14		use Ublaboo\DataGrid\Utils\Sorting;
15		use Dibi;
16
17		class DibiFluentDataSource extends FilterableDataSource implements IDataSource
18		{
19
20		/**
21		* @var Dibi\Fluent
22		*/
23		protected $data_source;
24
25		/**
26		* @var Dibi\Fluent
27		*/
28		protected $aggregation_data_source;
29
30		/**
31		* @var array
32		*/
33		protected $data = [];
34
35		/**
36		* @var string
37		*/
38		protected $primary_key;
39
40		/**
41		* @var bool
42		*/
43		protected $hasAggregationFunctions = FALSE;
44
45
46		/**
47		* @param Dibi\Fluent $data_source
48		* @param string $primary_key
49		*/
50		public function __construct(Dibi\Fluent $data_source, $primary_key)
51		{
52		$this->data_source = $data_source;
53		$this->aggregation_data_source = $data_source->getConnection();
		0 ignored issues – show Documentation Bug introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report It seems like `$data_source->getConnection()` of type `object<Dibi\Connection>` is incompatible with the declared type `object<Dibi\Fluent>` of property `$aggregation_data_source`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
54		$this->primary_key = $primary_key;
55		}
56
57
58		/********************************************************************************
59		* IDataSource implementation *
60		********************************************************************************/
61
62
63		/**
64		* Get count of data
65		* @return int
66		*/
67		public function getCount()
68		{
69		return $this->data_source->count();
70		}
71
72
73		/**
74		* Get the data
75		* @return array
76		*/
77		public function getData()
78		{
79		return $this->data ?: $this->data_source->fetchAll();
80		}
81
82
83		/**
84		* Filter data - get one row
85		* @param array $condition
86		* @return static
87		*/
88		public function filterOne(array $condition)
89		{
90		$this->data_source->where($condition)->limit(1);
91
92		return $this;
93		}
94
95
96		/**
97		* Filter by date
98		* @param Filter\FilterDate $filter
99		* @return void
100		*/
101	View Code Duplication	public function applyFilterDate(Filter\FilterDate $filter)
		0 ignored issues – show Duplication introduced 2016-02-01 16:07 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
102		{
103		$conditions = $filter->getCondition();
104
105		$date = \DateTime::createFromFormat($filter->getPhpFormat(), $conditions[$filter->getColumn()]);
106
107		$this->data_source->where('DATE(%n) = ?', $filter->getColumn(), $date->format('Y-m-d'));
		0 ignored issues – show Unused Code introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report The call to `Fluent::where()` has too many arguments starting with `$filter->getColumn()`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
108		}
109
110
111		/**
112		* Filter by date range
113		* @param Filter\FilterDateRange $filter
114		* @return void
115		*/
116	View Code Duplication	public function applyFilterDateRange(Filter\FilterDateRange $filter)
117		{
118		$conditions = $filter->getCondition();
119
120		$value_from = $conditions[$filter->getColumn()]['from'];
121		$value_to = $conditions[$filter->getColumn()]['to'];
122
123		if ($value_from) {
124		$date_from = \DateTime::createFromFormat($filter->getPhpFormat(), $value_from);
125		$date_from->setTime(0, 0, 0);
126
127		$this->data_source->where('DATE(%n) >= ?', $filter->getColumn(), $date_from);
		0 ignored issues – show Unused Code introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report The call to `Fluent::where()` has too many arguments starting with `$filter->getColumn()`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
128		}
129
130		if ($value_to) {
131		$date_to = \DateTime::createFromFormat($filter->getPhpFormat(), $value_to);
132		$date_to->setTime(23, 59, 59);
133
134		$this->data_source->where('DATE(%n) <= ?', $filter->getColumn(), $date_to);
		0 ignored issues – show Unused Code introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report The call to `Fluent::where()` has too many arguments starting with `$filter->getColumn()`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
135		}
136		}
137
138
139		/**
140		* Filter by range
141		* @param Filter\FilterRange $filter
142		* @return void
143		*/
144		public function applyFilterRange(Filter\FilterRange $filter)
145		{
146		$conditions = $filter->getCondition();
147
148		$value_from = $conditions[$filter->getColumn()]['from'];
149		$value_to = $conditions[$filter->getColumn()]['to'];
150
151		if ($value_from \|\| $value_from != '') {
152		$this->data_source->where('%n >= ?', $filter->getColumn(), $value_from);
		0 ignored issues – show Unused Code introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report The call to `Fluent::where()` has too many arguments starting with `$filter->getColumn()`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
153		}
154
155		if ($value_to \|\| $value_to != '') {
156		$this->data_source->where('%n <= ?', $filter->getColumn(), $value_to);
		0 ignored issues – show Unused Code introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report The call to `Fluent::where()` has too many arguments starting with `$filter->getColumn()`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
157		}
158		}
159
160
161		/**
162		* Filter by keyword
163		* @param Filter\FilterText $filter
164		* @return void
165		*/
166		public function applyFilterText(Filter\FilterText $filter)
167		{
168		$condition = $filter->getCondition();
169		$or = [];
170
171		foreach ($condition as $column => $value) {
172		$column = Dibi\Helpers::escape(
173		$this->data_source->getConnection()->getDriver(),
174		$column,
175		\dibi::IDENTIFIER
176		);
177
178		if ($filter->isExactSearch()) {
179		$this->data_source->where("$column = %s", $value);
		0 ignored issues – show Unused Code introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report The call to `Fluent::where()` has too many arguments starting with `$value`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
180		continue;
181		}
182
183	View Code Duplication	if ($filter->hasSplitWordsSearch() === FALSE) {
		0 ignored issues – show Duplication introduced 2016-07-11 17:22 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
184		$words = [$value];
185		} else {
186		$words = explode(' ', $value);
187		}
188
189		foreach ($words as $word) {
190		$escaped = $this->data_source->getConnection()->getDriver()->escapeLike($word, 0);
191
192		if (preg_match("/[\x80-\xFF]/", $escaped)) {
193		$or[] = "$column LIKE $escaped COLLATE utf8_bin";
194		} else {
195		$escaped = Strings::toAscii($escaped);
196		$or[] = "$column LIKE $escaped COLLATE utf8_general_ci";
197		}
198		}
199		}
200
201	View Code Duplication	if (sizeof($or) > 1) {
202		$this->data_source->where('(%or)', $or);
		0 ignored issues – show Unused Code introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report The call to `Fluent::where()` has too many arguments starting with `$or`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
203		} else {
204		$this->data_source->where($or);
205		}
206		}
207
208
209		/**
210		* Filter by multi select value
211		* @param Filter\FilterMultiSelect $filter
212		* @return void
213		*/
214		public function applyFilterMultiSelect(Filter\FilterMultiSelect $filter)
215		{
216		$condition = $filter->getCondition();
217		$values = $condition[$filter->getColumn()];
218		$or = [];
		0 ignored issues – show Unused Code introduced 2016-02-01 16:06 UTC by Report Bug Copy Issue Report `$or` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
219
220		if (sizeof($values) > 1) {
221		$value1 = array_shift($values);
222		$length = sizeof($values);
223		$i = 1;
224
225		$this->data_source->where('(%n = ?', $filter->getColumn(), $value1);
		0 ignored issues – show Unused Code introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report The call to `Fluent::where()` has too many arguments starting with `$filter->getColumn()`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
226
227		foreach ($values as $value) {
228		if ($i == $length) {
229		$this->data_source->or('%n = ?)', $filter->getColumn(), $value);
230		} else {
231		$this->data_source->or('%n = ?', $filter->getColumn(), $value);
232		}
233
234		$i++;
235		}
236		} else {
237		$this->data_source->where('%n = ?', $filter->getColumn(), reset($values));
		0 ignored issues – show Unused Code introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report The call to `Fluent::where()` has too many arguments starting with `$filter->getColumn()`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
238		}
239		}
240
241
242		/**
243		* Filter by select value
244		* @param Filter\FilterSelect $filter
245		* @return void
246		*/
247		public function applyFilterSelect(Filter\FilterSelect $filter)
248		{
249		$this->data_source->where($filter->getCondition());
250		}
251
252
253		/**
254		* Apply limit and offset on data
255		* @param int $offset
256		* @param int $limit
257		* @return static
258		*/
259		public function limit($offset, $limit)
260		{
261		$this->data = $this->data_source->fetchAll($offset, $limit);
262
263		return $this;
264		}
265
266
267		/**
268		* Sort data
269		* @param Sorting $sorting
270		* @return static
271		*/
272		public function sort(Sorting $sorting)
273		{
274		if (is_callable($sorting->getSortCallback())) {
275		call_user_func(
276		$sorting->getSortCallback(),
277		$this->data_source,
278		$sorting->getSort()
279		);
280
281		return $this;
282		}
283
284		$sort = $sorting->getSort();
285
286		if (!empty($sort)) {
287		$this->data_source->removeClause('ORDER BY');
288		$this->data_source->orderBy($sort);
289		} else {
290		/**
291		* Has the statement already a order by clause?
292		*/
293		$this->data_source->clause('ORDER BY');
294
295		$reflection = new \ReflectionClass('DibiFluent');
296		$cursor_property = $reflection->getProperty('cursor');
297		$cursor_property->setAccessible(TRUE);
298		$cursor = $cursor_property->getValue($this->data_source);
299
300		if (!$cursor) {
301		$this->data_source->orderBy($this->primary_key);
302		}
303		}
304
305		return $this;
306		}
307
308		/**
309		* @param string $aggregation_type
310		* @param string $column
311		*/
312		public function addAggregationColumn($aggregation_type, $column)
313		{
314		$this->aggregation_data_source = $this->aggregation_data_source->select($aggregation_type .'(%n)', $column)->as($column);
		0 ignored issues – show Unused Code introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report The call to `Fluent::select()` has too many arguments starting with `$column`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
315		}
316
317
318		/**
319		* @return array\|Dibi\Row\|FALSE
320		*/
321		public function getAggregationData()
322		{
323		if ($this->hasAggregationFunctions) {
324		return FALSE;
		0 ignored issues – show Bug Best Practice introduced 2016-11-02 20:53 UTC by Report Bug Copy Issue Report The return type of `return FALSE;` (`false`) is incompatible with the return type declared by the interface `Ublaboo\DataGrid\DataSou...rce::getAggregationData` of type `array`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
325		}
326		$data = $this->aggregation_data_source->from($this->data_source)->as('data')->fetch();
327		return $data;
328		}
329		}
330

ublaboo / datagrid

Pull Request — master (#375)

DibiFluentDataSource::getAggregationData() A

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