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Last change
on this file since 297 was
186,
checked in by jkraaijeveld, 13 years ago
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Implemented lazy evaluation.
- Initially, references to other database objects are now given as an ID rather than an object.
- Every model class now has an evaluate() function, which gets all the objects that object has references to. Returns true if it got all the values correctly, false if there are invalid references.
- Every connector now first evaluates an object before storing, to make sure only objects with valid references get stored.
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File size:
1.2 KB
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| 1 | <?php |
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| 2 | |
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| 3 | /** |
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| 4 | * Description of Survey |
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| 5 | * |
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| 6 | * @author jkraaijeveld |
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| 7 | */ |
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| 8 | class Survey extends ResearchToolObject{ |
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| 9 | public $title; |
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| 10 | public $description; |
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| 11 | public $creator; |
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| 12 | public $questions; |
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| 13 | |
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| 14 | public function __construct($uid = null, $title = null, $description = null, $creator = null, $questions = null) { |
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| 15 | if(!isset($uid)) |
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| 16 | { |
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| 17 | $uid = md5(uniqid(rand(), true)); |
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| 18 | } |
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| 19 | $this->uid = $uid; |
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| 20 | $this->title = $title; |
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| 21 | $this->description = $description; |
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| 22 | $this->creator = $creator; |
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| 23 | $this->questions = $questions; |
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| 24 | } |
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| 25 | |
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| 26 | /** |
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| 27 | * function evaluate() |
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| 28 | * Evaluates the references |
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| 29 | */ |
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| 30 | public function evaluate() |
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| 31 | { |
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| 32 | $dbi = new DatabaseInterface(); |
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| 33 | if(is_string($this->creator)) |
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| 34 | { |
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| 35 | $result = $dbi->get("user", array("uid" => $this->creator)); |
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| 36 | if(!isset($result[0])) |
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| 37 | return false; |
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| 38 | $this->creator = $result[0]; |
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| 39 | } |
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| 40 | |
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| 41 | if(!empty($this->questions) && is_string($this->questions[0])) |
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| 42 | { |
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| 43 | $newQuestions = array(); |
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| 44 | foreach($this->questions as $question) |
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| 45 | { |
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| 46 | $result = $dbi->get("question", array("uid" => $question)); |
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| 47 | if(!isset($result[0])) |
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| 48 | return false; |
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| 49 | $newQuestions[] = $result[0]; |
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| 50 | } |
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| 51 | $this->questions = newQuestions; |
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| 52 | } |
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| 53 | return true; |
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| 54 | } |
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| 55 | } |
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| 56 | |
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| 57 | ?> |
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