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150 lines
4.2 KiB
PHP
150 lines
4.2 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Engelsystem\Migrations;
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use Engelsystem\Database\Migration\Migration;
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use Illuminate\Database\Eloquent\Collection;
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use Illuminate\Database\Schema\Blueprint;
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use stdClass;
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/**
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* This migration creates the "questions" table and migrates the existing "Questions" records.
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*/
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class CreateQuestionsTable extends Migration
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{
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use ChangesReferences;
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use Reference;
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/**
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* @return void
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*/
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public function up(): void
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{
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$hasPreviousQuestionsTable = $this->schema->hasTable('Questions');
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if ($hasPreviousQuestionsTable) {
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// Rename because some SQL DBMS handle identifiers case insensitive
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$this->schema->rename('Questions', 'PreviousQuestions');
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}
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$this->createNewQuestionsTable();
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if ($hasPreviousQuestionsTable) {
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$this->copyPreviousToNewQuestionsTable();
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$this->changeReferences(
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'PreviousQuestions',
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'QID',
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'questions',
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'id',
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'unsignedInteger'
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);
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$this->schema->drop('PreviousQuestions');
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}
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}
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/**
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* @return void
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*/
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public function down(): void
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{
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// Rename as some SQL DBMS handle identifiers case insensitive
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$this->schema->rename('questions', 'new_questions');
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$this->createPreviousQuestionsTable();
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$this->copyNewToPreviousQuestionsTable();
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$this->changeReferences(
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'new_questions',
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'id',
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'Questions',
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'QID',
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'unsignedInteger'
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);
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$this->schema->drop('new_questions');
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}
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/**
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* @return void
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*/
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private function createNewQuestionsTable(): void
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{
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$this->schema->create(
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'questions',
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function (Blueprint $table) {
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$table->increments('id');
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$this->referencesUser($table, false);
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$table->text('text');
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$table->text('answer')
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->nullable();
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$this->references($table, 'users', 'answerer_id')
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->nullable();
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}
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);
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}
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/**
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* @return void
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*/
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private function copyPreviousToNewQuestionsTable(): void
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{
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$connection = $this->schema->getConnection();
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/** @var stdClass[] $previousQuestionsRecords */
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$previousQuestionsRecords = $connection
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->table('PreviousQuestions')
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->get();
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foreach ($previousQuestionsRecords as $previousQuestionRecord) {
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$connection->table('questions')->insert([
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'id' => $previousQuestionRecord->QID,
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'user_id' => $previousQuestionRecord->UID,
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'text' => $previousQuestionRecord->Question,
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'answerer_id' => $previousQuestionRecord->AID,
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'answer' => $previousQuestionRecord->Answer,
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]);
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}
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}
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/**
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* @return void
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*/
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private function createPreviousQuestionsTable(): void
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{
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$this->schema->create(
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'Questions',
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function (Blueprint $table) {
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$table->increments('QID');
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$this->references($table, 'users', 'UID');
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$table->text('Question');
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$this->references($table, 'users', 'AID')
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->nullable();
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$table->text('Answer')
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->nullable();
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}
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);
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}
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/**
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* @return void
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*/
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private function copyNewToPreviousQuestionsTable(): void
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{
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$connection = $this->schema->getConnection();
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/** @var Collection|stdClass[] $questionRecords */
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$questionRecords = $connection
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->table('new_questions')
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->get();
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foreach ($questionRecords as $questionRecord) {
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$connection->table('Questions')->insert([
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'QID' => $questionRecord->id,
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'UID' => $questionRecord->user_id,
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'Question' => $questionRecord->text,
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'AID' => $questionRecord->answerer_id,
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'Answer' => $questionRecord->answer,
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]);
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}
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}
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}
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