[Rails] Re: Relation In Mongodb using mongoid

Mohammed Niyas wrote in post #995052:
> Hi All,
> I am trying to implement follow and unfollow functionality like in
> twitter in my application. I am new to mongodb and I am using mongoid in
> my rails 3 app. I dont know how to make a relation between my User model
> and friends model. And I am also maintaining a model named deals which
> contains the user_id as a forign key and I also want to display the
> latest deals post by user that have been followed by me. Anyone please
> guide me to implement this functionality.
> Thanks a lot in Advance....

All this is explained in the Mongoid documentation:

http://mongoid.org/docs/relations.html

MongoDB isn't a relational database, which means there are differences
in how models are associated. First you need to decide which type of
association is best for a given relationship. Do you want the associated
objects to be "embedded" in the document, or do you want to store
references in the document.

http://mongoid.org/docs/relations/embedded.html
http://mongoid.org/docs/relations/referenced.html

Using embedded relations you can choose from one-to-many or one-to-one.
If you need many-to-many then you'll need to use referenced.

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