Ruby on Rails

> On Feb 2, 2018, at 9:07 PM, fugee ohu <fugee279@gmail.com> wrote:
>
>
>
> On Friday, February 2, 2018 at 5:01:05 PM UTC-5, Colin Law wrote:
> On 2 February 2018 at 19:39, fugee ohu <fuge...@gmail.com> wrote:
>
> So if I'm using the second approach the has_many_through then how do i create a new record?
>
> Start by reading the rails guide on active record relations, that shows you how to do that sort of thing.
>
> Colin
>
>
>
> This code `@person.pictures << @picture` causes an error
>
> Could not find the association :people_pictures in model Person
>
>
> class PeoplePictures < ApplicationRecord
> belongs_to :person
> belongs_to :picture
>
> class Person < ApplicationRecord
> has_many :pictures, through: :people_pictures
>
> class Picture < ApplicationRecord
> has_many :people, through: :people_pictures
>
>

If you have read the guide, as Colin recommended, really read every line of it, you would have seen this:

class Physician < ApplicationRecord
has_many :appointments
has_many :patients, through: :appointments
end

class Appointment < ApplicationRecord
belongs_to :physician
belongs_to :patient
end

class Patient < ApplicationRecord
has_many :appointments
has_many :physicians, through: :appointments
end

See how each has_many is described with two, separate has_many relationships? One goes to the "join object" and another to the "joined object". You are missing the association to the 'join object', which in your relationship would be:

has_many :people_pictures

Walter

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