在Ruby on Rails中为其他用户进行保存时如何保存参数

Question

I am building this page where teachers (a kind of user) can edit settings of their students. Every student can tell their teacher what instrument they play and teachers can let their students know what chords they have mastered.

Student page PS friend = student

= form_for :friend_instrument do |f|
  %br
  %h4.media-heading.text-post.search-result.center Basic chords
  %hr
  .half
    = f.label :c, "C chord"
    = f.select :c, [['No', false], ['Yes', true]], {}, class: 'form-control'
  .half
    = f.label :d, "D chord"
    = f.select :d, [['No', false], ['Yes', true]], {}, class: 'form-control'
  .half
    = f.label :e, "E chord"
    = f.select :e, [['No', false], ['Yes', true]], {}, class: 'form-control'
  .half
    = f.label :f, "F chord"
    = f.select :f, [['No', false], ['Yes', true]], {}, class: 'form-control'
  .half
    = f.label :g, "G chord"
    = f.select :g, [['No', false], ['Yes', true]], {}, class: 'form-control'
  .half
    = f.label :a, "A chord"
    = f.select :a, [['No', false], ['Yes', true]], {}, class: 'form-control'
  .half
    = f.label :b, "B chord"
    = f.select :b, [['No', false], ['Yes', true]], {}, class: 'form-control'                               
  = f.submit "Update #{instrument.name} chords #{friend.full_name} mastered", class: 'btn btn-primary form-control'

user_controller

  def students
    @instrument = Instrument.all
  end
  private
  def user_attributes
    params.require(:user).permit(:profile_picture, :cover_photo, :username, :full_name, :facebook_url, :featured_song, :soundcloud_url, :twitter_url, :location, :date_of_birth, :about, :website, :phone, :terms, :playlist_id, :subscribed, :password, :sort_user, :school_is, instrument_ids: [])
  end

user model

  has_many :user_instruments, dependent: :destroy
  has_many :instruments, through: :user_instruments
  accepts_nested_attributes_for :instruments

instrument model

class Instrument < ActiveRecord::Base
  has_many :user_instruments
  has_many :users, through: :user_instruments

  has_many :meeting_instruments
  has_many :meetings, through: :meeting_instruments
end

user instrument model

class UserInstrument < ActiveRecord::Base
  belongs_to :user
  belongs_to :instrument
end

I tried to add user_instruments_attributes but no luck! Any help would be much appreciated.

Answer 1

You want to keep that on the students side of things. The change you want to make is to allow teachers to update the attributes of students. You want to use cancan or access granted (I like access granted) to set who can update what.