doctrine Mapping.. mappedBy .. inversedBy ... relation tables updates not uncluded

Comment.php

<?php namespace Forum\Entity;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 * Description of Comment
 *
 * @author nousheeza
 */
class Comment
{
    /**
     *
     * @var int
     */
    protected $id;

    /**
     *
     * @var string
     */
    protected $content;

    /**
     *
     * @var string
     */
    protected $author;


    /**
     *
     * @var Post
     */
    protected $post;

    
    public function getId()
    {
        return $this->id;
    }

    public function getContent()
    {
        return $this->content;
    }

    public function getAuthor()
    {
        return $this->author;
    }

    public function getPost()
    {
        return $this->post;
    }

    public function setId($id)
    {
        $this->id = $id;
    }

    public function setContent($content)
    {
        $this->content = $content;
    }

    public function setAuthor($author)
    {
        $this->author = $author;
    }

    public function setPost(Post $post)
    {
        $this->post = $post;
    }



}

Forum.Entity.Comment.dcm.yml

Forum\Entity\Comment:
    type: entity
    table: comments
    id:
        id:
            type: integer
            generator:
                strategy: AUTO
    fields:
        content:
            type: string
            length: 1500
    OneToOne:
        author:
            targetEntity: Forum\Entity\User
    ManyToOne:
        post:
            targetEntity: Forum\Entity\Post
            inversedBy: comments

Forum.Entity.Post.dcm.yml

Forum\Entity\Post:
    type: entity
    table: posts
    id:
        id:
            type: integer
            generator:
                strategy: AUTO
    fields:
        title:
            type: string
            length: 250
        content:
            type: string
            length: 3500
    ManyToOne:
        author:
            targetEntity: Forum\Entity\User
            inversedBy: posts
    OneToMany:
        comments:
            targetEntity: Forum\Entity\Comment
            mappedBy: post

Forum.Entity.User.dcm.yml

Forum\Entity\User:
    type: entity
    table: users
    id:
        id:
            type: integer
            generator:
                strategy: AUTO
    fields:
        username:
            type: string
            length: 75
        displayName:
            type: string
            length: 75
    OneToMany:
        posts:
            targetEntity: Forum\Entity\Post
            mappedBy: author

Post.php

<?php namespace Forum\Entity;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 * Description of Post
 *
 * @author nousheeza
 */
class Post
{
    /**
     *
     * @var int
     */
    protected $id;

    /**
     *
     * @var string
     */
    protected $title;

    /**
     *
     * @var string
     */
    protected $content;

    /**
     *
     * @var mixed
     */
    protected $comments;

    /**
     *
     * @var User
     */
    protected $author;

    public function getId()
    {
        return $this->id;
    }

    public function getTitle()
    {
        return $this->title;
    }

    public function getContent()
    {
        return $this->content;
    }

    public function getComments()
    {
        return $this->comments;
    }

    public function getAuthor()
    {
        return $this->author;
    }

    public function setId($id)
    {
        $this->id = $id;
    }

    public function setTitle($title)
    {
        $this->title = $title;
    }

    public function setContent($content)
    {
        $this->content = $content;
    }

    public function setComments($comments)
    {
        $this->comments = $comments;
    }

    public function setAuthor(User $author)
    {
        $this->author = $author;
    }

}

SQL created

$ vendor/bin/doctrine orm:schema-tool:create --dump-sql

CREATE TABLE comments (id INTEGER NOT NULL, content VARCHAR(1500) NOT NULL, PRIMARY KEY(id));
CREATE TABLE posts (id INTEGER NOT NULL, title VARCHAR(250) NOT NULL, content VARCHAR(3500) NOT NULL, PRIMARY KEY(id));
CREATE TABLE users (id INTEGER NOT NULL, username VARCHAR(75) NOT NULL, displayName VARCHAR(75) NOT NULL, PRIMARY KEY(id));

User.php

<?php namespace Forum\Entity;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 * Description of User
 *
 * @author nousheeza
 */
class User
{
    /**
     *
     * @var int
     */
    protected $id;

    /**
     *
     * @var string
     */
    protected $username;

    /**
     *
     * @var string
     */
    protected $displayName;

    /**
     *
     * @var string
     */
    protected $posts;


    public function getId()
    {
        return $this->id;
    }

    public function getUsername()
    {
        return $this->username;
    }

    public function getDisplayName()
    {
        return $this->displayName;
    }

    public function getPosts()
    {
        return $this->posts;
    }

    public function setId($id)
    {
        $this->id = $id;
    }

    public function setUsername($username)
    {
        $this->username = $username;
    }

    public function setDisplayName($displayName)
    {
        $this->displayName = $displayName;
    }

    public function setPosts($posts)
    {
        $this->posts = $posts;
    }

}