我有桌面用户和桌面帖子当代码在MySQL环境下运行时一切正常，但是当我尝试将它们部署到heroku（Postgre SQL）时，问题就像下面的图片一样，我在这里想念一下吗？提前谢谢：
这是我的用户表： 的 1.2014_10_12_000000_create_users_table.php
<?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');
}
}
这是我的帖子表： 的 2。 2018_05_03_183219_create_posts_table.php
<?php
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreatePostsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('posts', function (Blueprint $table) {
$table->increments('id');
$table->integer('user_id')->unsigned();
$table->foreign('user_id')->references('id')->on('users')->onDelete('restrict');
$table->string('title');
$table->string('slug')->unique();
$table->text('excerpt');
$table->text('content');
$table->string('image')->nullable();
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('posts');
}
}
这是我的 UsersTableSeeder.php
<?php
use Illuminate\Database\Seeder;
class UsersTableSeeder extends Seeder
{
/**
* Run the database seeds.
*
* @return void
*/
public function run()
{
// Mengosongkan tabel users
// DB::statement('SET FOREIGN_KEY_CHECKS=0');
// Membuat 3 data users
DB::table('users')->insert([
[
'name' => 'Ogi',
'email' => 'ogi@example.com',
'password' => bcrypt('secret')
],
[
'name' => 'John Doe',
'email' => 'johndoe@example.com',
'password' => bcrypt('secret')
],
[
'name' => 'Jane Doe',
'email' => 'janedoe@example.com',
'password' => bcrypt('secret')
],
]);
}
}
这是我的 PostsTableSeeder.php
<?php
use Illuminate\Database\Seeder;
use Faker\Factory;
use Illuminate\Support\Facades\Schema; // Do not forget to import this namespace
class PostsTableSeeder extends Seeder
{
/**
* Run the database seeds.
*
* @return void
*/
public function run()
{
Schema::disableForeignKeyConstraints(); // This is the answer
// Mengosongkan tabel posts
DB::table('posts')->truncate();
Schema::enableForeignKeyConstraints(); // This is the answer
// Generate 10 data secara acak menggunakan faker library
$posts = [];
$faker = Factory::create();
for($i=1 ; $i <= 10 ; $i++) {
$image = "Post_Image_" . rand(1, 5) . ".jpg";
$date = date("Y-m-d H:i:s", strtotime("2018-05-04 00:00:00 +{$i} days"));
$posts[] = [
'user_id' => rand(1, 3),
'title' => $faker->sentence(rand(5, 9)),
'excerpt' => $faker->text(rand(70, 150)),
'content' => $faker->paragraphs(rand(5, 9), true),
'slug' => $faker->slug(),
'image' => rand(0, 1) == 1 ? $image : NULL,
'created_at' => $date,
'updated_at' => $date,
];
}
DB::table('posts')->insert($posts);
}
}
这里我的最终代码是 DatabaseSeeder.php
<?php
use Illuminate\Database\Seeder;
class DatabaseSeeder extends Seeder
{
/**
* Run the database seeds.
*
* @return void
*/
public function run()
{
$this->call(UsersTableSeeder::class);
$this->call(PostsTableSeeder::class);
}
}