php Laravel Migration TIps技巧

Posted 2021-05-05

<?php

//set foreign key to null

$table->integer('country_id')->nullable()->unsigned();

$table->integer('state_id')->nullable()->unsigned();

//set foreign key with references

$table->foreign('country_id')->references('id')->on('countries');
$table->foreign('state_id')->references('id')->on('states');