如何在Laravel中用lightHouse解决接口错误？

Question

我有一个问题，我有联系人，但它被分成个人或公司，创建一个interface，但在执行它的时候，它会生成一个错误：

#contact types
enum contactType{
    persona @enum(value: 2)
    empresa @enum(value: 3)
}
enum contactIdType{
    cedula @enum(value: 1)
    nit @enum(value: 2)
    pasaporte @enum(value: 3)
    cedula extranjera @enum(value: 4)
}
interface Contact{
    id_contact:ID!
    type:contactType!
    name:String!
    identification_type:contactIdType!
    identification_number:Int!
    email:String!
    phones:String!
    state:Int!
    address:String
    web_site:String
}

type Person implements Contact{
    id_contact:ID!
    id_parent_contact:Int
    id_job:Int
    type:contactType!
    name:String!
    lastname:String
    identification_type:contactIdType!
    identification_number:Int!
    email:String!
    phones:String!
    state:Int!
    address:String
    web_site:String
}

type Company implements Contact{
    id_contact:ID!
    type:contactType!
    name:String!
    identification_type:contactIdType!
    identification_number:Int!
    email:String!
    phones:String!
    state:Int!
    locate:String
    city:String
    address:String
    web_site:String
}

查询：

type Query {    
    #Contacts
    contacts: [Contact!]! @all(model: "App\\Contact")
    contacts_paginator: [Contact]! @paginate(type: "paginator" model: "App\\Contact")
    contact(name: String! @eq): Contact @find(model: "App\\Contact")

}

///

query{
  contacts{
    name
    type     
  }
}

结果：

{
  "errors": [
    {
      "debugMessage": "Abstract type Contact must resolve to an Object type at runtime for field Query.contacts with value \"{\"id_contact\":4,\"id_parent_contact\":null,\"id_job\":null,\"type\":2,\"name\":\"Laura\",\"lastname\":\"Sanchez\",\"identification_type\":1,\"identification_number\":1049342129,\"email\":\"laura@gmail.com\",\"phones\":\"3203428890\",\"state\":1,\"locate\":null,\"city\":null,\"address\":null,\"web_site\":null}\", received \"Contact\". Either the Contact type should provide a \"resolveType\" function or each possible type should provide an \"isTypeOf\" function.",
      "message": "Internal server error",
      "extensions": {
        "category": "internal"
      },
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "contacts",
        0
      ]

我在拉威尔灯塔工作

Answer 1

错误消息非常清楚。让我为你详细分析一下：

Abstract type Contact must resolve to an Object type at runtime for field Query.contacts

您将从您的字段返回一个接口Contact。GraphQL需要确定一个具体的对象类型，在本例中是Company或Person。

Either the Contact type should provide a \"resolveType\" function or each possible type should provide an \"isTypeOf\" function.

这一部分告诉您需要发生什么:您需要某种方法来确定Contact条目是Company还是Person。

通常，如果你使用不同的模型类，灯塔可以自动确定这一点。看起来您正在使用相同的类型解析器，因此您必须实现一个自定义类型解析器。

您可以使用以下命令简单地创建一个：

php artisan lighthouse:interface Contact

阅读有关灯塔中接口的更多信息：https://lighthouse-php.com/master/the-basics/types.html#interface

Answer 2

现在错误改变了，因为他相信：lighthouse:interface contact和生成了这个文件的：

<?php

namespace App\GraphQL\Interfaces;

use GraphQL\Type\Definition\Type;
use GraphQL\Type\Definition\ResolveInfo;
use Nuwave\Lighthouse\Schema\TypeRegistry;

class Contact
{
    /**
     * The type registry.
     *
     * @var \Nuwave\Lighthouse\Schema\TypeRegistry
     */
    protected $typeRegistry;

    /**
     * Constructor.
     *
     * @param  \Nuwave\Lighthouse\Schema\TypeRegistry  $typeRegistry
     * @return void
     */
    public function __construct(TypeRegistry $typeRegistry)
    {
        $this->typeRegistry = $typeRegistry;
    }

    /**
     * Decide which GraphQL type a resolved value has.
     *
     * @param  mixed  $rootValue The value that was resolved by the field. Usually an Eloquent model.
     * @param  \Nuwave\Lighthouse\Support\Contracts\GraphQLContext  $context
     * @param  \GraphQL\Type\Definition\ResolveInfo  $resolveInfo
     * @return \GraphQL\Type\Definition\Type
     */
    public function resolveType($rootValue, GraphQLContext $context, ResolveInfo $resolveInfo): Type
    {
        // Default to getting a type with the same name as the passed in root value
        // TODO implement your own resolver logic - if the default is fine, just delete this class

        return $this->typeRegistry->get(class_basename($rootValue));
    }
}

结果：

{
  "errors": [
    {
      "debugMessage": "Argument 2 passed to App\\GraphQL\\Interfaces\\Contact::resolveType() must be an instance of App\\GraphQL\\Interfaces\\GraphQLContext, instance of Nuwave\\Lighthouse\\Schema\\Context given, called in C:\\Users\\Guecha\\Laravel-projects\\APP_ControlIngenieria\\app\\vendor\\webonyx\\graphql-php\\src\\Type\\Definition\\InterfaceType.php on line 114",
      "message": "Internal server error",
      "extensions": {
        "category": "internal"
      },
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "contacts",
        0
      ],

在我的模型中，我有：

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Contact extends Model
{
    protected  $table= 'contacts';

    protected $primaryKey = 'id_contact';

    public $timestamps = false;

    protected $fillable = [
        'id_parent_contact',
        'id_job',
        'type',
        'name',
        'lastname',
        'identification_type',
        'identification_number',
        'email',
        'phones',
        'state',
        'locate',
        'city',
        'address',
        'web_site'
    ];
}

我不知道错误是什么:(