Laravel 4上两个以上的表或模型之间的关系

Question

I have this method:

public function tags()
{
    return $this->belongsToMany("Tag","question_tags");
}

this get the Tag's details through the question_tags table and connects Tag with Questions like:

Tags <- question_tags <- questions

Now I need to get the tag's details but using this relations:

Tag <- question_revision_tags <- question_revisions <- questions

but I can't make it work with a belongsToMany() or hasManyThrough() because there are more than 2 models implicated.

you think, it would be better if I insert a column on question_revision_tags called question_id? or is there a way to make this relation?

Answer 1

In this case you can make models Tag, QuestionRevision and Question.

I understand that right now you have "Question has many-to-many Tag-s" and it works fine.

Now you want to have

• Question has one-to-many QuestionRevisions
• QuestionRevisionTags has many-to-many Tag-s

After building such relationships you can get all tags of the question and all questions of a tag also. In this case there is no needfor 2 step many-to-many relationship.