How to get following users posts in Laravel 5.8 - sql

Question

I have two models in my Laravel 5.8 project, relationships is shown below in both model classes. How can I get every single post records related with every single user that I follow using just a single sql query ? Can I get it using Eloquent Query Builder or I need a Raw SQL Query ? Can Someone show me the SQL query to do it ?
Sorry, I didn't know what title to put in the question.
Thanks in advance !
User Class.
class User extends Authenticatable implements MustVerifyEmail{
use Notifiable, MessageAccessible, TagsCreator;
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = [
'name',
"lastname",
"country",
"city",
"phone_number",
'e_mail',
'password',
"role_id",
"profile_picture",
"occupation",
"biography"
];
/**
* The attributes that should be hidden for arrays.
*
* #var array
*/
protected $hidden = [
'password',
'remember_token'
];
/**
* The attributes that should be cast to native types.
*
* #var array
*/
protected $casts = ['email_verified_at' => 'datetime'];
public function posts(){
return $this->hasMany(Post::class);
}
public function followers(){
return $this->belongsToMany(User::class, 'follower_followed', 'followed_id', 'follower_id');
}
public function following(){
return $this->belongsToMany(User::class, 'follower_followed', 'follower_id', 'followed_id');
}
}
Post Class.
class Post extends Model{
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = [
'user_id',
"post_permission_id",
"title",
"content",
"likes",
"dislikes"
];
public function user(){
return $this->belongsTo(User::class);
}
}

Answer 1

I think what you need to do is this.
Not sure but in some Laravel versions you have to use select instead of pluck here. This defo works in 5.6
$posts = Post::whereIn('user_id', User::find($user_id)->followers->pluck('id'))->get();
then you might wanna order the posts by follower
$posts = Post::whereIn('user_id', User::find($user_id)->followers->pluck('id'))->orderBy('user_id', 'ASC')->get();
Here is the Documentation for whereIn Scroll a bit down, there is no direct anchor on whereIn :-)

Answer 2

After finding/selecting the user, you can get the related posts with something like this:
$user = Auth::user(); // selecting the logged in user
$user->posts;
For this to work, you must have user_id column in the posts table.
And if you want to have all users and their posts, you can do this:
$usersWithPosts = User::with('posts')->get();
This will return all users (whether they have any post or not) if you just want users that essentially have at least one post do this:
$usersWithPosts = User::has('posts')->get();

Answer 3

$following_data=['0'=>'2','1'=>'3','2'=>'5'];
$follower_post =DB::table('channel_posts')
->join('users','channel_posts.user_id','users.id')
->join('category','channel_posts.category_id','category.id')
->join('country','channel_posts.country_id','country.country_id')
->select('channel_posts.*','users.name','category.name','country.name')
->whereIn('channel_posts.user_id',$following_data)
->inRandomOrder()
->limit(10)
->get();
// dd($follower_post);