framework/console/controllers/BaseMigrateController.php
public function actionUp($limit = 0)
    {
        $migrations = $this->getNewMigrations();
        if (empty($migrations)) {
            $this->stdout("No new migrations found. Your system is up-to-date.\n", Console::FG_GREEN);

            return ExitCode::OK;
        }

        $total = count($migrations);
        $limit = (int) $limit;
        if ($limit > 0) {
            $migrations = array_slice($migrations, 0, $limit);
        }

        $n = count($migrations);
        if ($n === $total) {
            $this->stdout("Total $n new " . ($n === 1 ? 'migration' : 'migrations') . " to be applied:\n", Console::FG_YELLOW);
        } else {
            $this->stdout("Total $n out of $total new " . ($total === 1 ? 'migration' : 'migrations') . " to be applied:\n", Console::FG_YELLOW);
        }

        foreach ($migrations as $migration) {
            $nameLimit = $this->getMigrationNameLimit();
            if ($nameLimit !== null && strlen($migration) > $nameLimit) {
                $this->stdout("\nThe migration name '$migration' is too long. Its not possible to apply this migration.\n", Console::FG_RED);
                return ExitCode::UNSPECIFIED_ERROR;
            }
            $this->stdout("\t$migration\n");
        }
        $this->stdout("\n");

        $applied = 0;
        if ($this->confirm('Apply the above ' . ($n === 1 ? 'migration' : 'migrations') . '?')) {
            foreach ($migrations as $migration) {
                if (!$this->migrateUp($migration)) {
                    $this->stdout("\n$applied from $n " . ($applied === 1 ? 'migration was' : 'migrations were') . " applied.\n", Console::FG_RED);
                    $this->stdout("\nMigration failed. The rest of the migrations are canceled.\n", Console::FG_RED);

                    return ExitCode::UNSPECIFIED_ERROR;
                }
                $applied++;
            }

            $this->stdout("\n$n " . ($n === 1 ? 'migration was' : 'migrations were') . " applied.\n", Console::FG_GREEN);
            $this->stdout("\nMigrated up successfully.\n", Console::FG_GREEN);
        }
    }
public function actionUp($limit = 0)
    {
        $migrations = $this->getNewMigrations();
        if (empty($migrations)) {
            $this->stdout("No new migrations found. Your system is up-to-date.\n", Console::FG_GREEN);

            return ExitCode::OK;
        }

        $total = count($migrations);
        $limit = (int) $limit;
        if ($limit > 0) {
            $migrations = array_slice($migrations, 0, $limit);
        }

        $n = count($migrations);
        if ($n === $total) {
            $this->stdout("Total $n new " . ($n === 1 ? 'migration' : 'migrations') . " to be applied:\n", Console::FG_YELLOW);
        } else {
            $this->stdout("Total $n out of $total new " . ($total === 1 ? 'migration' : 'migrations') . " to be applied:\n", Console::FG_YELLOW);
        }

        foreach ($migrations as $migration) {
            $nameLimit = $this->getMigrationNameLimit();
            if ($nameLimit !== null && strlen($migration) > $nameLimit) {
                $this->stdout("\nThe migration name '$migration' is too long. Its not possible to apply this migration.\n", Console::FG_RED);
                return ExitCode::UNSPECIFIED_ERROR;
            }
            $this->stdout("\t$migration\n");
        }
        $this->stdout("\n");

        $applied = 0;
        if ($this->confirm('Apply the above ' . ($n === 1 ? 'migration' : 'migrations') . '?')) {
            foreach ($migrations as $migration) {
                if (!$this->migrateUp($migration)) {
                    $this->stdout("\n$applied from $n " . ($applied === 1 ? 'migration was' : 'migrations were') . " applied.\n", Console::FG_RED);
                    $this->stdout("\nMigration failed. The rest of the migrations are canceled.\n", Console::FG_RED);

                    return ExitCode::UNSPECIFIED_ERROR;
                }
                $applied++;
            }

            $this->stdout("\n$n " . ($n === 1 ? 'migration was' : 'migrations were') . " applied.\n", Console::FG_GREEN);
            $this->stdout("\nMigrated up successfully.\n", Console::FG_GREEN);
        }
    }
Upgrades the application by applying new migrations.

For example,

```
yii migrate     # apply all new migrations
yii migrate 3   # apply the first 3 new migrations
```

@param int $limit the number of new migrations to be applied. If 0, it means
applying all available new migrations.

@return int the status of the action execution. 0 means normal, other values mean abnormal.