使用doctrine从Symfony2中的外部数据库导入表

Question

我有一个带有自己的数据库的Symfony2项目,现在我想连接到另一个数据库(另一个项目),所以我可以修改一些表.

我在config_dev.yml中创建了新连接

doctrine:
    dbal:
        default_connection: default
        connections:
            default:
                driver:   pdo_mysql
                host:     localhost
                dbname:   database1
                user:     root
                password: 
            buv:
                driver:   pdo_mysql
                host:     localhost
                dbname:   database2
                user:     root
                password:

我尝试使用以下命令导入架构:

$ php app/console doctrine:mapping:import --em = buv MyBundle yml

[Doctrine\DBAL\Schema\SchemaException]表'old_table'上不存在索引''

但是database2中的一些表没有PK!并且完全导入不起作用.但我只想导入两个表,所以我试过:

$ php app/console doctrine:mapping:import --em = buv --filter ="tablename"MyBundle yml

但我得到了同样的错误,似乎--filter不工作.

控制台命令doctrine:mapping:import中的文档仅表示将实体名称放在过滤器选项中.但我还没有实体.

Answer 1

如果我找到你,你想导入你现有的数据库？

我所做的是:

php app/console doctrine:mapping:convert xml ./src/App/MyBundle/Resources/config/doctrine/metadata/orm --from-database --force

然后选择性转换为注释:

php app/console doctrine:mapping:import AppMyBundle annotation --filter="users_table"

如果您想要yml,请将注释更改为yml.

警告:当您导入到注释或yml时,它将删除您当前的实体文件.

Answer 2

Doctrine要求具有标识符/主键.看看这个页面:http://www.doctrine-project.org/docs/orm/2.0/en/reference/basic-mapping.html#identifiers-primary-keys

但是有一种方法可以从没有主键的表中生成映射和实体.没有主键的表是一种不寻常和错误的数据库设计,但在遗留数据库的情况下存在这种情况.

解决方案:
注意:以下所有引用均参考Doctrine 2.0
1.找到文件DatabaseDriver.php(在Doctrine/ORM/Mapping/Driver/DatabaseDriver.php中)
2.找到reverseEngineerMappingFromDatabase方法.修改如下所述的代码.
原始代码是:

private function reverseEngineerMappingFromDatabase()
    {
        if ($this->tables !== null) {
            return;
        }

        $tables = array();

        foreach ($this->_sm->listTableNames() as $tableName) {
            $tables[$tableName] = $this->_sm->listTableDetails($tableName);
        }

        $this->tables = $this->manyToManyTables = $this->classToTableNames = array();
        foreach ($tables as $tableName => $table) {
            /* @var $table \Doctrine\DBAL\Schema\Table */
            if ($this->_sm->getDatabasePlatform()->supportsForeignKeyConstraints()) {
                $foreignKeys = $table->getForeignKeys();
            } else {
                $foreignKeys = array();
            }

            $allForeignKeyColumns = array();
            foreach ($foreignKeys as $foreignKey) {
                $allForeignKeyColumns = array_merge($allForeignKeyColumns, $foreignKey->getLocalColumns());
            }

            if ( ! $table->hasPrimaryKey()) {
                throw new MappingException(
                    "Table " . $table->getName() . " has no primary key. Doctrine does not ".
                    "support reverse engineering from tables that don't have a primary key."
                );
            }

            $pkColumns = $table->getPrimaryKey()->getColumns();
            sort($pkColumns);
            sort($allForeignKeyColumns);

            if ($pkColumns == $allForeignKeyColumns && count($foreignKeys) == 2) {
                $this->manyToManyTables[$tableName] = $table;
            } else {
                // lower-casing is necessary because of Oracle Uppercase Tablenames,
                // assumption is lower-case + underscore separated.
                $className = $this->getClassNameForTable($tableName);
                $this->tables[$tableName] = $table;
                $this->classToTableNames[$className] = $tableName;
            }
        }
    }

修改后的代码是:

private function reverseEngineerMappingFromDatabase()
    {
        if ($this->tables !== null) {
            return;
        }

        $tables = array();

        foreach ($this->_sm->listTableNames() as $tableName) {
            $tables[$tableName] = $this->_sm->listTableDetails($tableName);
        }

        $this->tables = $this->manyToManyTables = $this->classToTableNames = array();
        foreach ($tables as $tableName => $table) {
            /* @var $table \Doctrine\DBAL\Schema\Table */
            if ($this->_sm->getDatabasePlatform()->supportsForeignKeyConstraints()) {
                $foreignKeys = $table->getForeignKeys();
            } else {
                $foreignKeys = array();
            }

            $allForeignKeyColumns = array();
            foreach ($foreignKeys as $foreignKey) {
                $allForeignKeyColumns = array_merge($allForeignKeyColumns, $foreignKey->getLocalColumns());
            }

            $pkColumns=array();
            if ($table->hasPrimaryKey()) {
                $pkColumns = $table->getPrimaryKey()->getColumns();
                sort($pkColumns);
            }

            sort($allForeignKeyColumns);

            if ($pkColumns == $allForeignKeyColumns && count($foreignKeys) == 2) {
                $this->manyToManyTables[$tableName] = $table;
            } else {
                // lower-casing is necessary because of Oracle Uppercase Tablenames,
                // assumption is lower-case + underscore separated.
                $className = $this->getClassNameForTable($tableName);
                $this->tables[$tableName] = $table;
                $this->classToTableNames[$className] = $tableName;
            }
        }
    }

3. 在同一文件中找到方法loadMetadataForClass.修改如下所述的代码.
找到下面陈述的代码:

try {
   $primaryKeyColumns = $this->tables[$tableName]->getPrimaryKey()->getColumns();
} catch(SchemaException $e) {
    $primaryKeyColumns = array();
}

像这样修改它:

try {
     $primaryKeyColumns = ($this->tables[$tableName]->hasPrimaryKey())?$this->tables[$tableName]->getPrimaryKey()->getColumns():array();
} catch(SchemaException $e) {
     $primaryKeyColumns = array();
}

即使对于没有主键的表,上述解决方案也会创建映射(xml/yml/annotation).

Answer 3

我已经通过schema_filter在 dotric dbal config ( ~/app/config/config.yml) 中添加 a 成功导入了一些数据库实体

# Doctrine Configuration
doctrine:
    dbal:
        driver:   %database_driver%
        host:     %database_host%
        port:     %database_port%
        dbname:   %database_name%
        user:     %database_user%
        password: %database_password%
        charset:  UTF8
        schema_filter: /^users_table/

app/console doctrine:mapping:import --force MyBundle yml

然后恢复 config.yml。