ruby - Rails Create Multiple Records in Join Table -

i'm trying create multiple records in join table via create action. here associations.

class user   has_many :abilities   has_many :skills, through: :abilities end  class job   has_many :abilities   has_many :skills, through: :abilities end  class ability   belongs_to :job   belongs_to :skill end 

i have form create new job. there select box choose skills needed job (skills created). in create action of jobs_controller.rb, how create multiple abilities? here's have.

def create   @job = job.new(job_params)   @abilities = @job.abilities.build(params[:job][:skills]) end 

my params returns array skills.

"job"=> {   "name"=>"abc",   "skills"=>["2", "5"] } 

getting stuck on how create 2 ability records in create action of jobs_controller (and associating gig_id gig being created).

you can use singular_collection_ids method this:

#app/controllers/jobs_controller.rb class jobscontroller < applicationcontroller    def new       @job = job.new       @skills = skill.all    end     def create       @job = job.new job_params       @job.save    end     private     def job_params       params.require(:job).permit(skill_ids: [])    end end  #app/views/jobs/new.html.erb <%= form_for @job |f| %>    <%= f.collection_select :skill_ids, @skills, :id, :name %>    <%= f.submit %> <% end %> 

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having said this, you've got major structural issue. need replace user skill:

#app/models/skill.rb class skill < activerecord::base   has_many :abilities   has_many :jobs, through: :abilities end  #app/models/ability.rb class ability < activerecord::base   belongs_to :job   belongs_to :skill end  #app/models/job.rb class job < activerecord::base   has_many :abilities   has_many :skills, through: :abilities end