使用Json的Laravel / PHP MySQL一对多关系

Question

Firstly is it a good idea to store one to many relationships in the form of a Json column and if so how do I write the query in laravel to retrieve the data

Ex :

I've activities table and verticals table

Activities Table

id | activity | verticals
1  | Dusting  | [1,2]
2  | Oiling   | [3]
3  | Mopping  | [1,2,3]

Verticals Table

id | vertical
1  | House Keeping
2  | Pantry
3  | Engineering & Machinery 

Now in my dashboard showing activities list the result should be

id | activity | verticals
1  | Dusting  | Housekeeping, Pantry
2  | Oiling   | Engineering & Machinery
3  | Mopping  | Housekeeping, Pantry, Engineering & Machinery

Now in the traditional non json method I'd have used laravel Eloquent's self::hasMany But can i do this same if using json

also is it advisable ?

Answer 1

I created a package with JSON relationships: https://github.com/staudenmeir/eloquent-json-relations

You can create a many-to-many relationship like this:

class Activity extends Model
{
    use \Staudenmeir\EloquentJsonRelations\HasJsonRelationships;

    protected $casts = [
       'verticals' => 'json',
    ];

    public function vertical()
    {
        return $this->belongsToJson(Vertical::class, 'verticals');
    }
}

class Vertical extends Model
{
    use \Staudenmeir\EloquentJsonRelations\HasJsonRelationships;

    public function activities()
    {
       return $this->hasManyJson(Activity::class, 'verticals');
    }
}