root
74 lines
2.1 KiB
PHP
74 lines
2.1 KiB
PHP
<?php
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namespace App\Database\Migrations;
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use CodeIgniter\Database\Migration;
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class RevertPrintRequestsForeignKey extends Migration
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{
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public function up()
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{
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if (! $this->db->tableExists('print_requests')) {
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return;
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}
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// Drop the old foreign key if it exists
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$db = \Config\Database::connect();
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$keys = $db->getForeignKeyData('print_requests');
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foreach ($keys as $key) {
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if ($key->constraint_name === 'print_requests_class_id_foreign') {
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try {
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$this->forge->dropForeignKey('print_requests', 'print_requests_class_id_foreign');
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} catch (\Throwable $e) {
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// Already absent.
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}
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break;
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}
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}
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if (! $this->db->tableExists('classes')) {
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return;
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}
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$orphanCount = (int) $db->table('print_requests pr')
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->join('classes c', 'c.id = pr.class_id', 'left')
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->where('pr.class_id IS NOT NULL', null, false)
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->where('c.id IS NULL', null, false)
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->countAllResults();
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if ($orphanCount > 0) {
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return;
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}
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// Add the new foreign key
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$this->forge->addForeignKey('class_id', 'classes', 'id', 'CASCADE', 'CASCADE');
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// Process the modifications
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$this->forge->processIndexes('print_requests');
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}
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public function down()
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{
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if (! $this->db->tableExists('print_requests')) {
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return;
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}
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// Drop the new foreign key
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try {
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$this->forge->dropForeignKey('print_requests', 'print_requests_class_id_foreign');
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} catch (\Throwable $e) {
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// Already absent.
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}
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if (! $this->db->tableExists('class_sections')) {
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return;
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}
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// Re-add the old foreign key
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$this->forge->addForeignKey('class_id', 'class_sections', 'id', 'CASCADE', 'CASCADE');
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// Process the modifications
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$this->forge->processIndexes('print_requests');
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}
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}
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