one to many save, codeigniter DataMapper

Question

Working on a site where a user can add videos. Each video can be in many sections. It can also have many questions. Video has a one-to-many relationships with both the question and section classes.

I'm getting the section and video classes like this:

    $s = new Section();
    $s->where('section', $this->post->section)->get();

then saving like this:

    $v->save($u, $s, $q);

where $v is a video object, $u is a user object and $q is a question object.

I want to allow the user to POST multiple questions and sections. How do I save those relationships. Should $s and $q be arrays of objects?

Answer 1

I am not 100% sure that I understand what you mean but yes yu can save multiple relations at the same time.

Like this:

$s = new Section();
$s->where_in('section', $array_with_sections_ids)->get();

$v->save(array($u, $s->all, $q));

Answer 2

You use different tables in your database. Like Video, Question and VideoQuestion where you store the video ID with the different Question id's

Then VideoExample would look like:

| video_id | question_id |
--------------------------
|    1     |      1      |
|    1     |      5      |
...

for inserting this data, first insert the video and get its ID with

$videoId = $this->db->insert_id()

Do the same for your question and you've got your ID's ;) The same for the other tables and you're done. Good Luck!