问题描述

我在宅基地虚拟机 (vagrant) 中使用最新版本的 laravel (5.1).

I'm using last version of laravel (5.1) in a homestead virtual machine (vagrant).

我将我的项目连接到本地 mariaDB 服务器，其中我有一些表和 2 个 db-view.

I connect my project to a local mariaDB server, in which I have some table and 2 db-view.

由于我仅在 db-view 表上进行了一些选择，因此我随机收到此错误:

Since I made some select only on the db-view tables, I receive back randomly this error:

一般错误:1615 Prepared statement需要重新准备

General error: 1615 Prepared statement needs to be re-prepared

从今天开始，当只在数据库视图上进行选择时，我总是会收到此错误.如果我打开我的 phpMyAdmin 并进行相同的选择，它会返回正确的结果.

From today, I always get this error when made select only on the db views. If I open my phpMyAdmin and make the same select it return the correct result.

我试图打开 php artisan tinker 并选择 db-view 的一条记录，但它返回相同的错误:

I tried to open php artisan tinker and select one record of the db-view but it return the same error:

// Select one user from user table
>>> $user = new AppUser
=> <AppUser #000000006dc32a890000000129f667d2> {}
>>> $user = AppUser::find(1);
=> <AppUser #000000006dc32a9e0000000129f667d2> {
       id: 1,
       name: "Luca",
       email: "luca@email.it",
       customerId: 1,
       created_at: "2015-08-06 04:17:57",
       updated_at: "2015-08-11 12:39:01"
   }
>>> 
// Select one source from Source db-view
>>> $source = new AppSource
=> <AppSource #000000006dc32a820000000129f667d2> {}
>>> $source = AppSource::find(1);
IlluminateDatabaseQueryException with message 'SQLSTATE[HY000]: General error: 1615 Prepared statement needs to be re-prepared (SQL: select * from `sources` where `sources`.`id` = 1 limit 1)'

我该如何解决这个问题?我读到了 mysqldump 的一个问题(但在我的情况下不是)并增加了 table_definition_cache 的值，但不确定它是否会起作用，我无法修改它们.

How can I fix that? I read about a problem with mysqldump (but not in my case) and to increase value of table_definition_cache but it is not sure that it will work and I can't modify them.

这是一种 laravel 的 bug 吗?

Is this a kind of laravel bug?

我怎么知道?

按照要求，我添加了我的模型源代码.源码.php:

As asked, I add my model source code. Source.php:

<?php

namespace App;

use IlluminateDatabaseEloquentModel;

class Source extends Model
{
    protected $table = 'sources';


    /*
    |--------------------------------------------------------------------------
    | FOREIGN KEYS
    |--------------------------------------------------------------------------
    */

    /**
     * 
     * @return [type] [description]
     */
    public function customersList(){
        return $this->hasMany("AppCustomerSource", "sourceId", "id");
    }


    /**
     * 
     * @return [type] [description]
     */
    public function issues(){
        return $this->hasMany("AppIssue", "sourceId", "id");
    }
}

<小时>

编辑 2:

Edit 2:

如果我在项目中使用 mysqli 执行相同的查询，它会起作用:

If I execute the same query in the project with mysqli it works:

$db = new mysqli(getenv('DB_HOST'), getenv('DB_USERNAME'), getenv('DB_PASSWORD'), getenv('DB_DATABASE'));
if($db->connect_errno > 0){
    dd('Unable to connect to database [' . $db->connect_error . ']');
}
$sql = "SELECT * FROM `sources` WHERE `id` = 4";
if(!$result = $db->query($sql)){
    dd('There was an error running the query [' . $db->error . ']');
}

dd($result->fetch_assoc());

<小时>

编辑 3:2个月后，我还在.同样的错误，没有找到解决方案.我决定在 aritsan tinker 中尝试一个小解决方案，但没有好消息.我报告了我的尝试:

EDIT 3: Afeter 2 month, I'm still there. Same error and no solution found. I decide to try a little solution in aritsan tinker but no good news. I report what I've tried:

首先尝试获取一个表模型:

First try to fetch a table model:

>>> $user = AppUser::find(1);
=> AppUser {#697
     id: 1,
     name: "Luca",
     email: "luca.d@company.it",
     customerId: 1,
     created_at: "2015-08-06 04:17:57",
     updated_at: "2015-10-27 11:28:14",
   }

现在尝试获取视图表模型:

Now try to fetch a view table model:

>>> $ir = AppContentRepository::find(15);
IlluminateDatabaseQueryException with message 'SQLSTATE[42S02]: Base table or view not found: 1146 Table 'dbname.content_repositories' doesn't exist (SQL: select * from `content_repositories` where `content_repositories`.`id` = 1 limit 1)'

当 contentRepository 在模型 ContentRepository.php 中没有正确的表名设置时:

When contentRepository doesn't have correct table name setup inside the model ContentRepository.php:

>>> $pdo = DB::connection()->getPdo();
=> PDO {#690
     inTransaction: false,
     errorInfo: [
       "00000",
       1146,
       "Table 'dbname.content_repositories' doesn't exist",
     ],
     attributes: [
       "CASE" => NATURAL,
       "ERRMODE" => EXCEPTION,
       "AUTOCOMMIT" => 1,
       "PERSISTENT" => false,
       "DRIVER_NAME" => "mysql",
       "SERVER_INFO" => "Uptime: 2513397  Threads: 12  Questions: 85115742  Slow queries: 6893568  Opens: 1596  Flush tables: 1  Open tables: 936  Queries per second avg: 33.864",
       "ORACLE_NULLS" => NATURAL,
       "CLIENT_VERSION" => "mysqlnd 5.0.11-dev - 20120503 - $Id: id_here $",
       "SERVER_VERSION" => "5.5.5-10.0.17-MariaDB-1~wheezy-wsrep-log",
       "STATEMENT_CLASS" => [
         "PDOStatement",
       ],
       "EMULATE_PREPARES" => 0,
       "CONNECTION_STATUS" => "localiphere via TCP/IP",
       "DEFAULT_FETCH_MODE" => BOTH,
     ],
   }
>>> 

在模型 ContentRepository.php 中更改表值:

CHANGE TABLE VALUE INSIDE model ContentRepository.php:

>>> $ir = AppContentRepository::find(15);
IlluminateDatabaseQueryException with message 'SQLSTATE[HY000]: General error: 1615 Prepared statement needs to be re-prepared (SQL: select * from `contentRepository` where `contentRepository`.`id` = 15 limit 1)'

正确时，注意缺少的errorInfo":

>>> $pdo = DB::connection()->getPdo();
=> PDO {#690
     inTransaction: false,
     attributes: [
       "CASE" => NATURAL,
       "ERRMODE" => EXCEPTION,
       "AUTOCOMMIT" => 1,
       "PERSISTENT" => false,
       "DRIVER_NAME" => "mysql",
       "SERVER_INFO" => "Uptime: 2589441  Threads: 13  Questions: 89348013  Slow queries: 7258017  Opens: 1604  Flush tables: 1  Open tables: 943  Queries per second avg: 34.504",
       "ORACLE_NULLS" => NATURAL,
       "CLIENT_VERSION" => "mysqlnd 5.0.11-dev - 20120503 - $Id: id_here $",
       "SERVER_VERSION" => "5.5.5-10.0.17-MariaDB-1~wheezy-wsrep-log",
       "STATEMENT_CLASS" => [
         "PDOStatement",
       ],
       "EMULATE_PREPARES" => 0,
       "CONNECTION_STATUS" => "localIPhere via TCP/IP",
       "DEFAULT_FETCH_MODE" => BOTH,
     ],
   }

显示 db 的表:

>>> $tables = DB::select('SHOW TABLES');
=> [
     {#702
       +"Tables_in_dbname": "table_name_there",
     },
     {#683
       +"Tables_in_dbname": "table_name_there",
     },
     {#699
       +"Tables_in_dbname": "table_name_there",
     },
     {#701
       +"Tables_in_dbname": "table_name_there-20150917-1159",
     },
     {#704
       +"Tables_in_dbname": "contentRepository", */ VIEW TABLE IS THERE!!!! /*
     },
     {#707
       +"Tables_in_dbname": "table_name_there",
     },
     {#684
       +"Tables_in_dbname": "table_name_there",
     },
   ]

尝试正常选择:

>>> $results = DB::select('select * from dbname.contentRepository limit 1');
IlluminateDatabaseQueryException with message 'SQLSTATE[HY000]: General error: 1615 Prepared statement needs to be re-prepared (SQL: select * from dbname.contentRepository limit 1)'

尝试未准备的查询:

>>> DB::unprepared('select * from dbname.contentRepository limit 1')
=> false

尝试第二次未准备的查询:

Try second time unprepared query:

>>> DB::unprepared('select * from dbname.contentRepository limit 1')
IlluminateDatabaseQueryException with message 'SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active.  Consider using PDOStatement::fetchAll().  Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute. (SQL: select * from dbname.contentRepository limit 1)'

试试 PDOStatement::fetchAll():

Try PDOStatement::fetchAll():

>>> DB::fetchAll('select * from dbname.contentRepository limit 1'); 
PHP warning:  call_user_func_array() expects parameter 1 to be a valid callback, class 'IlluminateDatabaseMySqlConnection' does not have a method 'fetchAll' in /Users/luca/company/Laravel/dbname/vendor/laravel/framework/src/Illuminate/Database/DatabaseManager.php on line 296

尝试第二个 PDOStatement::fetchAll():

Try second PDOStatement::fetchAll():

>>> $pdo::fetchAll('select * from dbname.contentRepository limit 1');
  [SymfonyComponentDebugExceptionFatalErrorException]  
  Call to undefined method PDO::fetchAll()           

Try 语句...:

>>> $pdos = DB::statement('select * from dbname.contentRepository limit 1')
IlluminateDatabaseQueryException with message 'SQLSTATE[HY000]: General error: 1615 Prepared statement needs to be re-prepared (SQL: select * from dbname.contentRepository limit 1)'

谢谢

推荐答案

好像可以添加

'options'   => [
                PDO::ATTR_EMULATE_PREPARES => true
            ]

在数据库配置中的 projectName/config/database.php 文件中.会是这样的:

Inside projectName/config/database.php file in DB configuration. It will be like this:

'mysql' => [
    'driver'    => 'mysql',
    'host'      => env('DB_HOST', 'localhost'),
    'database'  => env('DB_DATABASE', 'forge'),
    'username'  => env('DB_USERNAME', 'forge'),
    'password'  => env('DB_PASSWORD', ''),
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
    'strict'    => false,
    'options'   => [
        PDO::ATTR_EMULATE_PREPARES => true
    ]
],

Laravel 5.1.希望对您有所帮助！

Laravel 5.1. Hope it will help!

我目前在 Laravel 8 上，这个解决方案仍然有效.

I'm currently on Laravel 8 and this solution is still working.

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