I have one table named "files" which I would like to contain all my users files. The files can be uploaded from different views and should be related to different tables: questions table, answers table, comments table, messages table etc... but still, all of them will be related also to users table, that way I will know who is the owner of the file.
Example: "user asking a question, and attaching a picture to help other users understand the question more easily."
The question values goes into 'questions_table', the file goes to 'files_table', and the user ID also goes to 'files_table'.
The question is! (sorry for the long introduction): Should I use a pivot table? or just a double one-to-many relation from 1.'users_table' to 'files_table' & 2.from 'question_table' to 'files_table'?
I think this is the perfect use case for a Polymorphic Relationship .
Here is the structure of the tables:
users
- id
- name
questions
- id
- title
files
- id
- user_id
- filable_id
- filable_type
In the files
table, you can see a filable_id
field that is going to reference either a question id, answer id, comment id. And the filable_type
that is going to tell the record which object is associated with this file.
class Question extends Model
{
/**
* Get all of the question's files.
*/
public function files()
{
return $this->morphMany('App\File', 'filable');
}
}
class File extends Model
{
/**
* Get all of the owning filable models.
*/
public function filable()
{
return $this->morphTo();
}
}
I highly encourage you to learn more about this type of relationship on the Laravel Documentation
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