Eloquent morphTo issue in Laravel 5

I have a Project model. Each Project can have a thumbnail, main image and other multiple assets / images (project details for example) and also multiple text contents (that would be placed in between these images). And each Project page will pull in these assets (except the thumbnail) and texts, and display them in a specific order (that I define by drag and drop on my control panel).

So basically the similar structure to what Behance uses for example. I'm trying to structure this using Eloquent and here is what I have so far:

I have models Image Text and Node. Node model's table has order column to custom order these nodes.

My polymorphic relationships look like these:

MyProject model:

public function nodes()
{
    return $this->morphedByMany(Node::class, 'nodeable');
}

My Node model:

public function nodeable()
{
    return $this->morphTo();
}

Then in my code I do the following:

$project = new App\Project;
$project->title = 'Some title';
$project->save();

$image = new App\Image;
$image->source = 'somefile.jpg';

$project->nodes()->save($image);

But I get the following error:

Illuminate\Database\QueryException with message 'SQLSTATE[42S22]: Column not found: 1054 Unknown column 'project_id' in 'field list' (SQL: insert into `nodeables` (`nodeable_id`, `nodeable_type`, `project_id`) values (5, App\Node, 1))'

So I guess it's trying to create an entry inside a pivot table nodeables. Then I created this table and it saved an entry inside the pivot table, but not inside nodes table.

This is driving me mad! :(

via Chebli Mohamed