Hi everyone and thanks for help in advance!

I'm a newbe in a Symfony2 framework and I faced a question:

How to create bidirectional relationships from existing database?

At first I created database for my project and than I mapped it to the yml files;
Simply, DB looks like this:

Table `user`:

```
CREATE TABLE user (
    `id` INT NOT NULL AUTO_INCREMENT ,
    `login` VARCHAR(255) NULL ,
    `password` VARCHAR(255) NULL ,  
    `customer_id` INT NOT NULL ,    
    PRIMARY KEY (`id`) ,  
    INDEX `fk_user_customer1_idx` (`customer_id` ASC) ,
    CONSTRAINT `fk_user_customer1`
        FOREIGN KEY (`customer_id` )
        REFERENCES `customer` (`id` )  
) ENGINE = InnoDB

```

Table `customer`:

```
CREATE  TABLE IF NOT EXISTS `customer` (
    `id` INT NOT NULL AUTO_INCREMENT ,
    `surname` VARCHAR(45) NULL ,
    `name` VARCHAR(45) NULL ,
    `midname` VARCHAR(45) NULL ,
    PRIMARY KEY (`id`) 
) ENGINE = InnoDB

```

If I'm right, "user" have Many-to-One relationship to the "customer"; and "user" is an owning side, "customer" is an inverse side;

Then I run these commands:

```
php app/console doctrine:mapping:import ShadowTestBundle yml --force

```

And got the result:

```
Shadow\TestBundle\Entity\User:
    type: entity
    table: user
    fields:
        id:
            id: true
            type: integer
            unsigned: false
            nullable: false
            generator:
                strategy: IDENTITY
        login:
            type: string
            length: 255
            fixed: false
            nullable: true
        password:
            type: string
            length: 255
            fixed: false
            nullable: true
    manyToOne:
        customer:
            targetEntity: Customer
            cascade: {  }
            mappedBy: null
            inversedBy: null
            joinColumns:
                customer_id:
                    referencedColumnName: id
            orphanRemoval: false
    lifecycleCallbacks: {  }

Shadow\TestBundle\Entity\Customer:
    type: entity
    table: customer
    fields:
        id:
            id: true
            type: integer
            unsigned: false
            nullable: false
            generator:
                strategy: IDENTITY
        surname:
            type: string
            length: 45
            fixed: false
            nullable: true
        name:
            type: string
            length: 45
            fixed: false
            nullable: true
        midname:
            type: string
            length: 45
            fixed: false
            nullable: true
    lifecycleCallbacks: {  }

```

And conforming entities by run command:

```
php app/console doctrine:generate:entities ShadowTestBundle

```

Entities reflects correctly the yml-files;

But both yml-files and entities use only unidirectional links; is it possible to generate bi-directional links, or I must write it manually?
As far as I see, it should look like that:

```
Shadow\TestBundle\Entity\Customer:
    type: entity
    table: customer
    fields:
...
        midname:
            type: string
            length: 45
            fixed: false
            nullable: true
        oneToMany:
            user:
                targetEntity: User
                mappedBy: cart
lifecycleCallbacks: {  }

```

And I also have a little subquestion:
Why on the owning side (User), which generated by Doctrine, field "inversedBy" is null?