我正在建立一个laravel项目（我是初学者）来管理客户（一个客户有很多合同，而合同有很多不同的产品）。我想实现CRUD方法并生成pdf，但是在迁移数据库时，开始时就有一个问题。 （这是开始，所以我想这对我来说很难...）
我编写了所有迁移文件（客户+合同+产品）并进行了迁移 客户（客户）：
.cdk-overlay-container{
z-index:2000 !important; //higher then fixed header z-index so it comes above
}
合同（矛盾）
<?php
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class Clients extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('clients', function (Blueprint $table) {
$table->Increments('id');
$table->string('name');
$table->string('company');
$table->string('email', 50);
$table->string('phone', 15);
$table->string('adress1', 50);
$table->string('adress2', 50);
$table->string('adresse3', 50);
$table->string('pays', 20);
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
schema::drop('clients');
}
}
和产品（产品）
<?php
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class Contrats extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('contrats', function (Blueprint $table) {
$table->Increments('id');
/* $table->unsignedBigInteger('clients_name');
$table->foreign('name')->references('name')->on('Clients'); */
$table->string('id_dossier');
$table->string('id_contrat');
$table->string('id_bateau');
$table->date('startdate');
$table->index('startdate');
$table->date('enddate');
$table->index('enddate');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
schema::drop('contrats');
}
}
迁移表已成功创建。 迁移：2014_10_12_000000_create_users_table 迁移时间：2014_10_12_000000_create_users_table（0.03秒） 迁移：2014_10_12_100000_create_password_resets_table 迁移时间：2014_10_12_100000_create_password_resets_table（0.02秒） 迁移：2019_10_15_131435_clients 已迁移：2019_10_15_131435_clients（0.01秒） 迁移：2019_10_15_131454_contrats
Illuminate \ Database \ QueryException：SQLSTATE [42000]：语法错误或访问冲突：1072表中不存在键列'name'（SQL：alter table
在<?php use Illuminate\Support\Facades\Schema; use Illuminate\Database\Schema\Blueprint; use Illuminate\Database\Migrations\Migration; class Produits extends Migration { /** * Run the migrations. * * @return void */ public function up() { Schema::create('produits', function (Blueprint $table) { $table->Increments('id'); $table->foreign('name'); $table->string('description', 20); $table->double('price'); $table->double('taxes'); }); } /** * Reverse the migrations. * * @return void */ public function down() { schema::drop('produits'); } }添加约束contrats外键（contrats_name_foreign）引用name（Clients））/Applications/MAMP/htdocs/test04/vendor/laravel/framework/src/Illuminate/Database/Connection.php:664 660 | //如果在尝试运行查询时发生异常，我们将格式化错误 661 | //包含SQL绑定的消息，这将使此异常成为 662 | //对开发人员有更多帮助，而不仅仅是数据库的错误。 663 | catch（例外$ e）{
664 |抛出新的QueryException（ 665 | $ query，$ this-> prepareBindings（$ bindings），$ e 666 | ）; 667 | } 668 |
异常跟踪：
name
我希望可以顺利进行此项目
预先感谢您的帮助，欢呼。
答案 0 :(得分：0)
外键列格式必须与它在另一张表上引用的列的格式匹配，因此它应为unsignedBigInteger而不是string
Schema::create('contrats', function (Blueprint $table) {
$table->Increments('id');
/* $table->unsignedBigInteger('clients_name'); */
$table->string('name');
$table->foreign('name')->references('name')->on('clients');
$table->string('id_dossier');
$table->string('id_contrat');
$table->string('id_bateau');
$table->date('startdate');
$table->index('startdate');
$table->date('enddate');
$table->index('enddate');
$table->timestamps();
});
强烈建议您改为引用主键id
Eloquent将使用命名约定来使用不太明确的代码建立适当的关系
clients
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
class CreateClientsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('clients', function (Blueprint $table) {
$table->bigIncrements('id');
$table->string('name');
$table->string('company');
$table->string('email', 50);
$table->string('phone', 15);
$table->string('adress1', 50);
$table->string('adress2', 50);
$table->string('adresse3', 50);
$table->string('pays', 20);
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('clients');
}
}
contrats
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
class CreateContratsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('contrats', function (Blueprint $table) {
$table->bigIncrements('id');
$table->unsignedBigInteger('client_id');
$table->foreign('client_id')->references('id')->on('clients')->onDelete('cascade');
$table->string('id_dossier');
$table->string('id_contrat');
$table->string('id_bateau');
$table->date('startdate');
$table->index('startdate');
$table->date('enddate');
$table->index('enddate');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('contrats');
}
}
produits
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
class CreateProduitsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('produits', function (Blueprint $table) {
$table->bigIncrements('id');
$table->unsignedBigInteger('client_id');
$table->foreign('client_id')->references('id')->on('clients');
$table->string('description', 20);
$table->double('price');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('produits');
}
}
希望这会有所帮助
勇气：）
答案 1 :(得分：0)
将您的函数编写为这样的约束迁移
Schema::create('contrats', function (Blueprint $table) {
$table->Increments('id');
$table->string('id_dossier');
$table->string('id_contrat');
$table->string('id_bateau');
$table->date('startdate')->index();
$table->date('enddate')->index();
$table->timestamps();
});