Gestion des jointures
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xdrm-brackets
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d1eb8e4b12
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@ -8,10 +8,11 @@
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class Rows{
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/* Attributs */
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public $where; // Tableau associatif contenant les conditions
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public $select; // Tableau contenant la liste des champs à afficher
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public $unique; // VRAI si on attend une valeur unique
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public $schema; // Tableau contenant les informations associées aux données
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private $where; // Tableau associatif contenant les conditions
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private $select; // Tableau contenant la liste des champs à afficher
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private $unique; // VRAI si on attend une valeur unique
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private $schema; // Tableau contenant les informations associées aux données
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private $joined; // Tableau contenant les Rows liés
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/* CONSTRUCTEUR
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@ -31,6 +32,9 @@
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/* (4) On initialise le caractère 'unique' du résultat */
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$this->unique = false;
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/* (5) On initialise les jointures */
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$this->joined = [];
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}
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@ -219,6 +223,48 @@
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/* JOINT UNE SECONDE TABLE ()
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*
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* @field<String> Nom d'une colonne
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* @rows<Rows> Rows d'une autre table
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*
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* @return this<Rows> Retourne l'object courant
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*
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*/
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public function join($field, $rows){
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/* [0] Vérification des paramètres
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=========================================================*/
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if( !is_string($field) || !($rows instanceof Rows) )
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return $this;
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/* [1] On vérifie que la clé étrangère est correcte
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=========================================================*/
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/* (1) On vérifie que la colonne existe et qu'elle est étrangère*/
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if( !isset($this->schema['columns'][$field]['references']) )
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return $this;
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/* (2) On vérifie que la table de @rows est correcte */
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if( $this->schema['columns'][$field]['references'][0] != $rows->schema['table'] )
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return $this;
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/* [2] On enregistre la référence
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=========================================================*/
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$this->joined[$field] = $rows;
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/* [3] On retourne l'object courant
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=========================================================*/
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return $this;
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}
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/* PERMET DE DIRE QUE L'ON VEUT UN RESULTAT UNIQUE
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*
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* @return this<Rows> Retourne l'object courant
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@ -281,60 +327,114 @@
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$unique = !is_bool($unique) ? $this->unique : $unique;
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/* [1] On rédige la requête
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/* [1] On rédige la clause SELECT
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=========================================================*/
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/* (1) On initialise la requête */
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$requestS = "SELECT ";
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/* (2) Si aucun champ, on sélectionne tous les champs */
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if( count($this->select) == 0 )
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$requestS .= "* ";
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/* (2) Si aucun SELECT local, on prend tout */
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$c = 0;
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if( count($this->select) == 0 ){
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$requestS .= $this->schema['table'].".*";
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$c++;
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}
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/* (3) Sinon, on sélectionne les champs que l'on veut */
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else
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foreach($this->select as $f=>$field)
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if( $f == 0 ) $requestS .= $field;
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else $requestS .= ', '.$field;
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/* (3) Si aucun SELECT de jointure, on prend tout */
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foreach($this->joined as $rows)
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if( count($rows->select) == 0 ){
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if( $c == 0 ) $requestS .= $rows->schema['table'].".*";
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else $requestS .= ', '.$rows->schema['table'].".*";
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$c++;
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}
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/* (4) Clause FROM */
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$requestS .= "\nFROM ".$this->schema['table']."\n";
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/* (5) Sinon, on sélectionne les champs locaux */
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foreach($this->select as $field){
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if( $c == 0 ) $requestS .= $this->schema['table'].'.'.$field;
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else $requestS .= ', '.$this->schema['table'].'.'.$field;
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$c++;
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}
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/* (5) Sinon, on sélectionne les champs de jointure */
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foreach($this->joined as $rows)
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foreach($rows->select as $field){
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if( $c == 0 ) $requestS .= $rows->schema['table'].'.'.$field;
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else $requestS .= ', '.$rows->schema['table'].'.'.$field;
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$c++;
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}
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/* (5) On ajoute les conditions */
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/* [2] On rédige la clause FROM
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========================================================*/
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/* (1) Table locale */
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$requestS .= "\nFROM ".$this->schema['table'];
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/* (2) Tables de jointure */
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foreach($this->joined as $j=>$rows)
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$requestS .= ", ".$rows->schema['table'];
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/* (3) Retour à la ligne */
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$requestS .= "\n";
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/* [5] On rédige la clause WHERE/AND
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=========================================================*/
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/* (1) On met les conditions locales */
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$c = 0;
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foreach($this->where as $field=>$value){
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if( $c == 0 ) $requestS .= ' WHERE '.$field.' = :'.$field."\n";
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else $requestS .= ' AND '.$field.' = :'.$field."\n";
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if( $c == 0 ) $requestS .= 'WHERE '.$this->schema['table'].'.'.$field.' = :'.$this->schema['table'].'_x_'.$field."\n";
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else $requestS .= 'AND '.$this->schema['table'].'.'.$field.' = :'.$this->schema['table'].'_x_'.$field."\n";
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$c++;
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}
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/* (6) On prépare la requête */
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$request = Database::getPDO()->prepare($requestS);
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/* (2) On ajoute les jointures */
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foreach($this->joined as $localField=>$rows){
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if( $c == 0 ) $requestS .= 'WHERE '.$this->schema['table'].'.'.$localField.' = '.$this->schema['columns'][$localField]['references'][0].'.'.$this->schema['columns'][$localField]['references'][1]."\n";
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else $requestS .= 'AND '.$this->schema['table'].'.'.$localField.' = '.$this->schema['columns'][$localField]['references'][0].'.'.$this->schema['columns'][$localField]['references'][1]."\n";
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$c++;
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}
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/* (3) On ajoute les conditions des jointures */
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foreach($this->joined as $rows)
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foreach($rows->where as $field=>$value){
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if( $c == 0 ) $requestS .= 'WHERE '.$rows->schema['table'].'.'.$field.' = :'.$rows->schema['table'].'_x_'.$field."\n";
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else $requestS .= 'AND '.$rows->schema['table'].'.'.$field.' = :'.$rows->schema['table'].'_x_'.$field."\n";
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$c++;
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}
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/* [5] On exécute la requête et 'bind' les paramètres
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/* [6] On exécute la requête et 'bind' les paramètres
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=========================================================*/
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/* (1) On bind tous les paramètres */
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/* (0) On prépare la requête */
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$request = Database::getPDO()->prepare($requestS);
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$binded = [];
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/* (1) On bind tous les paramètres locaux */
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foreach($this->where as $field=>$value)
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$binded[':'.$field] = $value;
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$binded[':'.$this->schema['table'].'_x_'.$field] = $value;
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/* (2) On exécute la requête */
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/* (3) On bind tous les paramètres des jointures */
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foreach($this->joined as $rows)
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foreach($rows->where as $field=>$value)
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$binded[':'.$rows->schema['table'].'_x_'.$field] = $value;
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/* [6] On exécute la requête et retourne le résultat
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=========================================================*/
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/* (1) On exécute la requête */
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$request->execute($binded);
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/* [6] On retourne le résultat
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=========================================================*/
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/* (1) Si unique */
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/* (2) Si unique */
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if( $unique )
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return $this->format( $request->fetch() );
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/* (2) Si tout */
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/* (3) Si tout */
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return $this->format( $request->fetchAll() );
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}
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@ -342,14 +342,19 @@
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debug();
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$warehouse = Table::get('warehouse')->getByName('stef-montauban');
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$myUser =
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Table::get('user')
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->getByIdWarehouse(7)
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->getById(3) // PRIMARY KEY (if composed, all arguments in array)
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->getByUsername('gediaz') // Dynamic getter 'getByMySuperColumn' -> 'my_super_column'
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->select(['mail', 'username', 'firstname'])
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->select('id_user')
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->unique();
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->unique()
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->join('id_warehouse', $warehouse)
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->fetch();
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var_dump($myUser->schema['columns']);
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var_dump($myUser);
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?>
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