rails, accepts_nested and has_many :through is creating duplicate entries

Question

I have a store model that has many products with a has_many :through relationship.

I have this working with accepts_nested_attributes, but the result is that rails is making duplicate associates.

I don't have anything special going on it is a very simple app.

Any ideas on why duplicates associates are getting created?

let me work on it a little more and then I will post. I was just checking if anyone knows about a bug — thenengah, Apr 04 '10 at 06:22
I changed the association to just a has_many instead of with :through => and that fixed the problem. It was creating double entries with a nested nested attribute. My code was not very good so I didn't add much else to this question. You can just ignore it. — thenengah, Apr 07 '10 at 09:25

score 1 · Answer 1 · edited May 23 '17 at 12:18

look at answer : how to avoid duplicates in a has_many :through relationship? here :

add :uniq => true to the has_many :through

class Blog < ActiveRecord::Base
 has_many :blogs_readers, :dependent => :destroy
 has_many :readers, :through => :blogs_readers, :uniq => true
end

class Reader < ActiveRecord::Base
 has_many :blogs_readers, :dependent => :destroy
 has_many :blogs, :through => :blogs_readers, :uniq => true
end

class BlogsReaders < ActiveRecord::Base
  belongs_to :blog
  belongs_to :reader
end

score 0 · Accepted Answer · answered May 11 '10 at 21:39

0

This is a confirmed bug in Rails, with a fix set to be included in 2.3.6.

https://rails.lighthouseapp.com/projects/8994/tickets/3575-multiple-join-records-when-using-nested_attributes-in-habtm

answered May 11 '10 at 21:39

BrendanDean

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rails, accepts_nested and has_many :through is creating duplicate entries

2 Answers2