<?php namespace Illuminate\Database\Console\Migrations; use Illuminate\Console\ConfirmableTrait; use Illuminate\Database\Migrations\Migrator; use Symfony\Component\Console\Input\InputOption; class MigrateCommand extends BaseCommand {// Migrate Command extends Base Command use ConfirmableTrait; /** * The console command name. * * @var string */ protected $name = 'migrate';//The console command name. /** * The console command description. * * @var string */ protected $description = 'Run the database migrations';// description /** * The migrator instance. * * @var \Illuminate\Database\Migrations\Migrator */ protected $migrator;// instance of this class of migrator /** * Create a new migration command instance. * * @param \Illuminate\Database\Migrations\Migrator $migrator * @return void */ public function __construct(Migrator $migrator) { parent::__construct(); $this->migrator = $migrator; }// Create a new migration command instance. /** * Execute the console command. * * @return void */ public function fire() { if (! $this->confirmToProceed()) { return; }//fire that just execute the console command $this->prepareDatabase();// prepareDatabase just like general // The pretend option can be used for "simulating" the migration and grabbing // the SQL queries that would fire if the migration were to be run against // a database for real, which is helpful for double checking migrations. $pretend = $this->input->getOption('pretend'); // simulating: to make a thing like you want // grabbing: catch or get // this is pretend to double checking migration // Next, we will check to see if a path option has been defined. If it has // we will use the path relative to the root of this installation folder // so that migrations may be run for any path within the applications. if (! is_null($path = $this->input->getOption('path'))) { $path = $this->laravel->basePath().'/'.$path; } else { $path = $this->getMigrationPath(); }// if does not has the path option,we will set a default place.other maybe in anywhere. $this->migrator->run($path, [ 'pretend' => $pretend, 'step' => $this->input->getOption('step'), ]);// set fire or execute with path and pretend even this step // Once the migrator has run we will grab the note output and send it out to // the console screen, since the migrator itself functions without having // any instances of the OutputInterface contract passed into the class. foreach ($this->migrator->getNotes() as $note) { $this->output->writeln($note); }// write the notes in log or in output // just a mind ,it too great! // Finally, if the "seed" option has been given, we will re-run the database // seed task to re-populate the database, which is convenient when adding // a migration and a seed at the same time, as it is only this command. if ($this->input->getOption('seed')) { $this->call('db:seed', ['--force' => true]); }// if has this "seed" order, then we must run it. } /** * Prepare the migration database for running. * * @return void */ protected function prepareDatabase() {//prepare Database $this->migrator->setConnection($this->input->getOption('database')); // connection if (! $this->migrator->repositoryExists()) { $options = ['--database' => $this->input->getOption('database')]; $this->call('migrate:install', $options); } }// call the migrate install is very good type. /** * Get the console command options. * * @return array */ protected function getOptions() {// Get the console command options. return [ ['database', null, InputOption::VALUE_OPTIONAL, 'The database connection to use.'], ['force', null, InputOption::VALUE_NONE, 'Force the operation to run when in production.'], ['path', null, InputOption::VALUE_OPTIONAL, 'The path of migrations files to be executed.'], ['pretend', null, InputOption::VALUE_NONE, 'Dump the SQL queries that would be run.'], ['seed', null, InputOption::VALUE_NONE, 'Indicates if the seed task should be re-run.'], ['step', null, InputOption::VALUE_NONE, 'Force the migrations to be run so they can be rolled back individually.'], ]; }// Get the console command options. }
[李景山php]每天laravel-20161126|MigrateCommand.php
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