如何将数据保存到has_many_through表，同时节省与nested_form轨父对象

Question

我有工作模式，技术模式和job_skill模型

class Job < ActiveRecord::Base 
     has_many :job_skills 
     has_many :skills ,through: :job_skills 
     accepts_nested_attributes_for :job_skills 


class Skill < ActiveRecord::Base 
    has_many :job_skills 
    has_many :jobs ,through: :job_skills 
    accepts_nested_attributes_for :job_skills 


class JobSkill < ActiveRecord::Base 
    belongs_to :skill 
    belongs_to :job 
    accepts_nested_attributes_for :job 
    accepts_nested_attributes_for :skill 

和就业控制器

class JobsController < ApplicationController 
    def new 
     @job = Job.new 
     @job.job_skills.build 
    end 

    def create 
     @job = Job.new(job_params) 
     @job.save 
    end 

    private 
    def job_params 
    params.require(:job).permit(:occupation, :industry, :location,job_skills_attributes:[]) 
    end 

和工作形式是

= form_for @job do |f| 
    = f.label :location 
    = f.text_field :location  
.clear 
    = f.label "industry*" 
    = f.text_field :industry 
.clear 
    = f.label :occupation 
    = f.text_field :occupation 
.clear 
    = f.label "Skill Required*" 
    = f.fields_for(:job_skills) do |s| 
    = s.select :skill_id, Skill.all.collect{|p| [p.skill, p.id]},{}, {:multiple => true, :class=> "chosen-select multiple-select-skills"} 
= f.submit "submit" 

only job get save。 jobs_skills不保存。在工作参数中，我只能得到工作数据。可能是什么原因。请帮忙。！！您的form_for到nested_form_for

= nested_form_for @job do |f| 
    = f.label :location 
    = f.text_field :location  
.clear 
    = f.label "industry*" 
    = f.text_field :industry 
.clear 
    = f.label :occupation 
    = f.text_field :occupation 
.clear 
    = f.label "Skill Required*" 
    = f.fields_for(:job_skills) do |s| 
= s.select :skill_id, Skill.all.collect{|p| [p.skill, p.id]},{}, {:multiple => true, :class=> "chosen-select multiple-select-skills"} 

Answer 1

更新。

你模式应该

class Job < ActiveRecord::Base 
    has_many :job_skills 
    has_many :skills ,through: :job_skills 

class Skill < ActiveRecord::Base 
    has_many :job_skills 
    has_many :jobs ,through: :job_skills 

class JobSkill < ActiveRecord::Base 
    belongs_to :skill 
    belongs_to :job 

和就业控制器

class JobsController < ApplicationController 
    def new 
    @job = Job.new 
    #@job.job_skills.build #=> No need of buid 
    end 

    def create 
    @job = Job.new(job_params) 
    @job.save 
    end 

    private 

    # Add skill_ids to job_params 
    def job_params 
    params.require(:job).permit(:occupation, :industry, :location, skill_ids:[]) 
    end 

和工作形式

= form_for @job do |f| 
    = f.label :location 
    = f.text_field :location  
    .clear 
    = f.label "industry*" 
    = f.text_field :industry 
    .clear 
    = f.label :occupation 
    = f.text_field :occupation 
    .clear 
    = f.label "Skill Required*" 
    = s.select :skill_ids, Skill.all.collect{|p| [p.skill, p.id]},{}, {:multiple => true, :class=> "chosen-select multiple-select-skills"} 
    = f.submit "submit" 

希望这会对你有帮助

Answer 2

在这种情况下accepts_nested_attributes_for不需要