Rails搜索=>模型关系

Question

I have a main model called 'Notes' which has the following:

attr_accessible :name, :label_tokens
has_many :labelships
has_many :labels, :through => :labelships
attr_reader :label_tokens

So basically the Note_id & Label_id are kept in the Labelships table.

What i would like to do is create a list of distinct Labels and create a link on each value to the respective Note.

Example: Note 'mynote' has a label of 'git' associated through the labelship table, i would like Git to appear on a list of other labels, and then when i click on git, i get a list of Notes that have the label 'git' on them.

Answer 1

Assuming you have the following models:

class Note
  has_many :labelships
  has_many :labels, :through => :labelships
end

class Labelships
  belongs_to :note
  belongs_to :label
end

class Label
  has_many :labelships
  has_many :notes, :through => :labelships
end

Now given a label, you can get its notes as follows:

label.notes

To exclude the note in hand:

label.notes.where("id != ?", note.id)