接着上篇： http://www.jianshu.com/p/7c884d23f632
本篇把第一节中的数据库使用laravel的数据库迁移，迁入数据库。
书写数据迁移文件
导入项目到phpstrom中，会在database 下面看见 migrations文件夹，默认会有如下两个文件
2014_10_12_000000_create_users_table.php
2014_10_12_100000_create_password_resets_table.php
内容分别为
** 2014_10_12_000000_create_users_table.php **
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;class CreateUsersTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('users', function (Blueprint $table) {
$table->increments('id');
$table->string('name');
$table->string('email')->unique();
$table->string('password');
$table->rememberToken();
$table->timestamps();
});
}/** * Reverse the migrations. * * @return void */ public function down() { Schema::dropIfExists('users'); }}
** 2014_10_12_100000_create_password_resets_table.php **
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;class CreatePasswordResetsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('password_resets', function (Blueprint $table) {
$table->string('email')->index();
$table->string('token');
$table->timestamp('created_at')->nullable();
});
}/** * Reverse the migrations. * * @return void */ public function down() { Schema::dropIfExists('password_resets'); }}
迁移文件结构框架
通过默认的文件看，迁移文件的结构大致 如下：
class XXXXXXTable extends Migration
{
public function up()//迁移创建
{
Schema::create('password_resets', function (Blueprint $table) {
//创建或者修改字段
});
}
public function down()//回滚等时候调用
{
Schema::dropIfExists('password_resets');//舍弃数据表
}
}
创建posts表数据迁移文件
看了上面的大致结构，其实我们是可以自己写的，但是，为了省力，laravel框架为我们已经提供了很方便的命令
php artisan make:migration posts
http://d.laravel-china.org/docs/5.4/migrations#creating-columns
我这里直接粘贴我的迁移文件.
提示：所有的迁移命令请在homestead的虚拟机中运行
** php artisan make:migration posts **
class Posts extends Migration
{
private $table_name = 'posts';
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create($this->table_name, function (Blueprint $table) {
$table->increments('id');
$table->integer('uid')->unsigned();
$table->string('title')->unique();
$table->text('content')->defalult('');
$table->text('description')->defalult('');
$table->tinyInteger('status')->default(1);
$table->timestamps();
});Schema::table($this->table_name, function($table) { $table->foreign('uid')->references('id')->on('users')->onDelete('cascade'); }); } /** * Reverse the migrations. * * @return void */ public function down() { Schema::drop($this->table_name); }}
** php artisan make:migration comments **
class Comments extends Migration
{
private $table_name = 'comments';/** * Run the migrations. * * @return void */ public function up() { Schema::create($this->table_name, function (Blueprint $table) { $table->increments('id'); $table->integer('uid')->unsigned(); $table->integer('post_id')->default(0); $table->string('title')->unique(); $table->text('content')->defalult(''); $table->tinyInteger('status')->default(1); $table->timestamps(); }); Schema::table($this->table_name, function($table) { $table->foreign('uid')->references('id')->on('users')->onDelete('cascade'); $table->foreign('post_id')->references('id')->on('posts')->onDelete('cascade'); }); } /** * Reverse the migrations. * * @return void */ public function down() { Schema::drop($this->table_name); }}
** php artisan make:migration users **
class CreateUsersTable extends Migration
{
private $table_name = 'users';
/**
* Run the migrations.
*
* @return void
/
public function up()
{
Schema::create($this->table_name, function (Blueprint $table) {
$table->increments('id');
$table->string('name');
$table->string('email')->unique();
$table->string('password');
$table->string('description')->default('');
$table->string('avatar')->default('');
$table->string('profile_image')->default('');
$table->tinyInteger('status')->default(1);
$table->rememberToken();
$table->timestamps();
});
}
/*
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists($this->table_name);
}
}
运行迁移命令
php artisan migrate
不出意外
[Illuminate\Database\QueryException]
SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint (SQL: alter tablecommentsadd constraintcomments_post_id_foreignforeign key (post_id) referencesposts(id) on del
ete cascade)[PDOException]
SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint
不要怕折腾！！！
我查询了一些资料，有说是字段不对，有说是 存储引擎不对！还有说是迁移命令执行的时候，表之间有依赖关系，需要控制表的执行顺序！！！
但是，我最后发现是默认 increments 默认生产的id都是无符号的，所以，这里要保持一致（截图只是示意，例如uid那个unsigned我是加了的）！
如下
$table->integer('post_id')->unsigned()->default(0);
到这里，数据表制作好了！
对了，如果中间遇到错误 可以运行rollback命令，也可以手动暴力删除数据库所有表。
连接laravel 数据库
认真安装过homestead的同学，肯定知道如何连接了 ，配置如下
ip：127.0.0.1
端口：33060
用户名：homestead
密码：homestead
使用sequrl pro 链接如下
还不错，laravel考虑的还是比较多的，不愧是艺术家的框架！
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