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has_one through incorrect id add

#6251

class Device < ActiveRecord::Base
has_many :units has_many :components, :through => :units end

class Component < ActiveRecord::Base
has_one :unit has_one :device, :through => :unit end

class Unit < ActiveRecord::Base
belongs_to :device belongs_to :component end

Everything I add a device_id to a component, it adds 1 to the device_id stored in the Units table.

x=Component.new
x.device=1
x.save

device_id=2 in the Unit model

Reported by ronin-131274 (at lighthouseapp) · January 5th, 2011 @ 05:15 AM

State: new
Milestone: none
Assigned to: nobody
Importance: none

Activity

  1. glebm
    glebm

    Confirmed

    January 10th, 2011 @ 09:31 PM

  2. gerardc
    gerardc

    Why would you add 1 as the device for x and not a Component object?

    January 11th, 2011 @ 02:10 PM

  3. gerardc
    gerardc

    Edit to my previous comment:

    Why would you set x.device to hold the value 1 instead of a Device object

    /newb

    January 11th, 2011 @ 02:15 PM

  4. ronin-131274 (at lighthouseapp)
    ronin-131274 (at lighthouseapp)

    If I wanted to assign a component to a device.

    January 11th, 2011 @ 02:23 PM

  5. Dan Pickett
    Dan Pickett

    this looks as though it doesn't honor the contract in associations.

    x.device = 1 is not a proper assignment. You must assign x's device association to a device object.

    x.device_id = 1 should successfully assign the foreign key for you.

    March 12th, 2011 @ 04:19 PM