带有 MSSQL Doctrine 的 Symfony 2.6 无法更新数据库答案

【问题标题】：Symfony 2.6 with MSSQL Doctrine failed to update Database带有 MSSQL Doctrine 的 Symfony 2.6 无法更新数据库
【发布时间】：2017-12-01 09:07:00
【问题描述】：

大家好，

我对 Symfony 2 和 Doctrine 的 MSSQL 数据库有疑问。在“php app/console 学说：数据库：创建”和“php app/console 学说：schema:create”上都很好。但是在“php app/console dictionary:schema:update”上，ORM-Mapper 或实体显示没有任何变化，出现以下错误：

[Doctrine\DBAL\DBALException]
An exception occurred while executing 'ALTER TABLE product DROP CONSTRAINT DF_D34A04AD_A5D6E63E':
SQLSTATE[42000]: [Microsoft][ODBC Driver 13 for SQL Server][SQL Server]DF_D34A04AD_A5D6E63E is not a restriction.

请帮忙

当我从名为“DF__product__timesta__38996AB5”的表中手动删除限制时，这是一个新错误：

[Doctrine\DBAL\DBALException]
An exception occurred while executing 'ALTER TABLE product ALTER COLUMN timestamp DATETIME DEFAULT CURRENT_TIMESTAMP':
SQLSTATE[42000]: [Microsoft][ODBC Driver 13 for SQL Server][SQL Server]Incorrect syntax near the DEFAULT keyword.

请帮忙

数据库

Microsoft SQL Server 2016

PHP 包：

php70.x86_64                        1.0-5.el7
php70-php.x86_64                    7.0.26-1.el7
php70-php-cli.x86_64                7.0.26-1.el7
php70-php-common.x86_64             7.0.26-1.el7
php70-php-json.x86_64               7.0.26-1.el7
php70-php-pdo.x86_64                7.0.26-1.el7
php70-php-sqlsrv.x86_64             4.3.0-1.el7
php70-php-xml.x86_64                7.0.26-1.el7
php70-runtime.x86_64                1.0-5.el7

parameters.yml

database_driver: sqlsrv

src/AppBundle/Entity/Product.php 命名空间 AppBundle\Entity;

class Product
{
    private $name;
    private $price;
    private $description;
    private $timestamp;
}

src/AppBundle/Resources/config/doctrine/Product.orm.yml

AppBundle\Entity\Product:
    type: entity
    table: product
    id:
        id:
            type: integer
            generator: { strategy: AUTO }
    fields:
        name:
            type: string
            length: 100
        price:
            type: decimal
            scale: 2
        description:
            type: test
        timestamp:
            type: datetime
            columnDefinition: DATETIME DEFAULT CURRENT_TIMESTAMP
            nullable: false

table panel.product的导出结构

CREATE TABLE IF NOT EXISTS "product" (
"id" INT(10,0) NOT NULL,
"name" NVARCHAR(100) NOT NULL,
"price" NUMERIC(10,2) NOT NULL,
"description" VARCHAR(max) NOT NULL,
"timestamp" DATETIME(3) NULL DEFAULT (getdate()),
PRIMARY KEY ("id")
);

作曲家表演-i

doctrine/annotations                 v1.2.6  Docblock Annotations Parser
doctrine/cache                       v1.4.1  Caching library offering an object-oriented API for many cache backends
doctrine/collections                 v1.3.0  Collections Abstraction library
doctrine/common                      v2.5.0  Common Library for Doctrine projects
doctrine/dbal                        v2.4.4  Database Abstraction Layer
doctrine/doctrine-bundle             v1.5.0  Symfony DoctrineBundle
doctrine/doctrine-cache-bundle       v1.0.1  Symfony2 Bundle for Doctrine Cache
doctrine/inflector                   v1.0.1  Common String Manipulations with regard to casing and singular/plural rules.
doctrine/lexer                       v1.0.1  Base library for a lexer that can be used in Top-Down, Recursive Descent Parsers.
doctrine/orm                         v2.4.7  Object-Relational-Mapper for PHP
incenteev/composer-parameter-handler v2.1.1  Composer script handling your ignored parameter file
jdorn/sql-formatter                  v1.2.17 a PHP SQL highlighting library
kriswallsmith/assetic                v1.2.1  Asset Management for PHP
monolog/monolog                      1.15.0  Sends your logs to files, sockets, inboxes, databases and various web services
psr/log                              1.0.0   Common interface for logging libraries
sensio/distribution-bundle           v4.0.0  Base bundle for Symfony Distributions
sensio/framework-extra-bundle        v3.0.9  This bundle provides a way to configure your controllers with annotations
sensio/generator-bundle              v2.5.3  This bundle generates code for you
sensiolabs/security-checker          v2.0.5  A security checker for your composer.lock
swiftmailer/swiftmailer              v5.4.1  Swiftmailer, free feature-rich PHP mailer
symfony/assetic-bundle               v2.6.1  Integrates Assetic into Symfony2
symfony/monolog-bundle               v2.7.1  Symfony MonologBundle
symfony/swiftmailer-bundle           v2.3.8  Symfony SwiftmailerBundle
symfony/symfony                      v2.6.11 The Symfony PHP framework
twig/extensions                      v1.2.0  Common additional features for Twig that do not directly belong in core
twig/twig                            v1.18.2 Twig, the flexible, fast, and secure template language for PHP

【问题讨论】：

标签： php sql-server symfony doctrine sqlsrv

【解决方案1】：

这不是向列添加默认值的有效语法：

ALTER TABLE product ALTER COLUMN timestamp DATETIME DEFAULT
CURRENT_TIMESTAMP

你应该使用

ALTER TABLE product ADD DEFAULT CURRENT_TIMESTAMP
 FOR [timestamp]

或者你可以为你的约束使用一个名字：

ALTER TABLE product ADD CONSTRAINT DF_TIMESTAMP DEFAULT CURRENT_TIMESTAMP
 FOR [timestamp]

您收到的第一个错误很奇怪，因为当您尝试删除不存在的约束时，您应该得到 p>

'DF_D34A04AD_A5D6E63E' 不是约束。

原因是您使用了错误的约束名称。它似乎不会像使用生成的表名+字段名时那样自动生成默认约束名。所以再次检查约束名称。

【讨论】：

ALTER TABLE 产品 ALTER COLUMN 时间戳 DATETIME DEFAULT CURRENT_TIMESTAMP 无法更改此代码来自学说。 'DF_D34A04AD_A5D6E63E' 不是约束。这是从教义来的。我不确定从哪里得到这个名字的教义。
>>>ALTER TABLE product ALTER COLUMN timestamp DATETIME DEFAULT CURRENT_TIMESTAMP 不能改变
>>>我不确定从哪里得到这个名称。