Production not works = same code on dev works :)

You are missing an object somewhere in $comment->event->type->name - one of the relations is returning null which is not uncommon. Better to code defensively, and test for existence of the object before using it.

My relations is ok.

Comment.php:

    public function event() 
    {
        return $this->belongsTo(Event::class);
    } 

Event.php

public function comment()
    {
        return $this->hasMany(Comment::class);
    } 

    public function type() 
    {
        return $this->belongsTo(Type::class);
    }  

Type.php

  public function event()
    {
        return $this->hasMany(Event::class);
    }        

I do not see wrong relations here. hmmm....

I have found that this line works in CommentsController.php

echo "<BR><BR><BR>"; var_dump($comments[0]->event->type->name);

But the same not works in comments/index.blade.php

<B> {{ $comment->event->type->name}} </B>

VERY strange.....

It is not strange. Read again what @tykus said :)

Presumably you're looping through each comments as comment prior to the errant line.

There is obviously a comment in the collection where event is not an object. That's your problem. As has been said, it's not strange.

WHY ***THE CODE** WORKS on development laptop?
WHY ***THE CODE** WORKS on development laptop?
WHY ***THE CODE** WORKS on development laptop?
WHY ***THE CODE** WORKS on development laptop?

WHY NOT on production hosting?
WHY NOT on production hosting?
WHY NOT on production hosting?
WHY NOT on production hosting?

I am looping here :

index.blade.php

                        <tbody>
                                @foreach($comments as $comment)
                                        @include ('comments.comment')
                                @endforeach
                        </tbody>

comment.blade.php

    <td> 
        <code> 
                {{$comment->body }} 
        </code> 
        <br>
        <font size="-1">
                <B> {{ $comment->event->type->name}} </B>   <---LINE 8
                <i>{{ $comment->user->name }} -> ({{ $comment->updated_at}}) </i>
        </font> 
    </td>
    <td>

When I change LINE 8 to this:

{{ $comment->anything }}  <----this works
{{ $comment->event->type->name }} <---this not

anything = any column of comments table. This works.

Does my production server has too small memory to hold huge object?

{{ $comment->event->type->name}} <-- check if not null

You laptop works because you have some sample data in database.

You don't have an event related to the certain comment. check your database

mazwan, kenny11

I DID copy production database to laptop development. And two databases are 1 to 1 identical. I did check all tables in Events, Types and Comments table. Tables has XXX_ID fields.

For example :
Comments Table has event_id
Events Table has  type_id
Types Table has name filed.

Then command :

{{ $comment->event->type->name}}

should works.

I did inspect database content and See correct fileds, and its contents. Numbers in event_id or type_id ponts to correct data.

Relation is correctly set up.

Comments.php have
return $this->belongsTo(Event::class);

Event.php have
return $this->belongsTo(Type::class);
return $this->hasMany(Comment::class);

Type.php have
return $this->hasMany(Event::class);

Also I did some experiments in CommentController.php and found that I can acces to object $comment:

//This is experiment:

$comments = Comment::all();
$counts = Comment:all()->count();

//I can access for elements like this:

for ( $i=0; $i<$counts ; $i++) {
echo $comments->event->type->name;
}

But in View:

@foreach($comments as $comment)
 {{$comment->event->type->name}}
@endforeach

///This make error.

I think we have BUG in Laravel core.

But strange that this works:

@foreach($comments as $comment)
 {{$comment->user->name}}
@endforeach

This is double strange , users table is the same defined as one-to-many relationship.

DO you have CLUE?

WHY this works in DEV and NOT in PROD?

@foreach($comments as $comment)
 {{ dd($comment, $comment->event, $comment->event->type) }}
@endforeach 

@vapenation var_dump() not dd()