Question

我试图将我的student_id连接到submission_id，但它无法正常工作。我有一个名为submissionstudent的连接表。

Student Controller.rb：

class StudentsController < ApplicationController
before_action :set_student, only: [:show, :edit, :update, :destroy]

  # GET /students
  # GET /students.json
  def index
    @students = Student.all
  end

  # GET /students/1
  # GET /students/1.json
  def show
  end

  # GET /students/new
  def new
    @student = Student.new
  end

  # GET /students/1/edit
  def edit
  end

  # POST /students
  # POST /students.json
  def create
    @student = Student.new(student_params)

    respond_to do |format|
      if @student.save
        format.html { redirect_to @student, notice: 'Student was successfully created.' }
        format.json { render :show, status: :created, location: @student }
      else
        format.html { render :new }
        format.json { render json: @student.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /students/1
  # PATCH/PUT /students/1.json
  def update
    respond_to do |format|
      if @student.update(student_params)
        format.html { redirect_to @student, notice: 'Student was successfully updated.' }
        format.json { render :show, status: :ok, location: @student }
      else
        format.html { render :edit }
        format.json { render json: @student.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /students/1
  # DELETE /students/1.json
  def destroy
    @student.destroy
    respond_to do |format|
      format.html { redirect_to students_url, notice: 'Student was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_student
      @student = Student.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def student_params
      params.require(:student).permit(:name)
    end
end

提交Controller.rb：

class SubmissionsController < ApplicationController
before_action :set_submission, only: [:show, :edit, :update, :destroy]
  before_action :set_form

  # GET /submissions/new
  def new
    @submission = Submission.new

    @all_students = Student.all

    @submission_student = @submission.submissionstudent.build
  end

  # GET /submissions/1/edit
  def edit
  end

  # POST /submissions
  # POST /submissions.json
  def create
    @submission = Submission.new(submission_params)
    @submission.form_id = @form.id

    respond_to do |format|
      if @submission.save
        format.html { redirect_to @form, notice: 'Submission was successfully created.' }
        format.json { render :show, status: :created, location: @submission }
      else
        format.html { render :new }
        format.json { render json: @submission.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /submissions/1
  # PATCH/PUT /submissions/1.json
  def update
    respond_to do |format|
      if @submission.update(submission_params)
        format.html { redirect_to @submission, notice: 'Submission was successfully updated.' }
        format.json { render :show, status: :ok, location: @submission }
      else
        format.html { render :edit }
        format.json { render json: @submission.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /submissions/1
  # DELETE /submissions/1.json
  def destroy
    @submission.destroy
    respond_to do |format|
      format.html { redirect_to submissions_url, notice: 'Submission was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_submission
      @submission = Submission.find(params[:id])
    end

    def set_form
      @form = Form.find(params[:form_id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def submission_params
      params.require(:submission).permit(:conflict, :computer, :extra_time, :am_pm)
    end
end

Model Student.rb：

class Student < ActiveRecord::Base
  has_many :submissionstudent
  has_many :submissions, :through => :submissionstudent
end

Model Submission.rb：

class Submission < ActiveRecord::Base
  belongs_to :form

  has_many :submissionstudent
  has_many :students, :through => :submissionstudent
end

加入表模型Studentsubmission.rb：

class Submissionstudent < ActiveRecord::Base
  belongs_to :submission
  belongs_to :student
end

告诉我你是否还需要更多代码，谢谢你的帮助

Answer 1

您可能需要根据最佳做法更改association_name，table_name，model_name和file_names，我相信它会起作用

型号名称：Singular CamelCase，例如StudentSubmission
模型文件名：单数snake_case（_分隔），例如student_submission
表名：复数submissions
加入表名：复数，例如students_submissions按字母顺序排列的＃表名称学生将在稍后提交
has_many association：复数，例如student_submissions
belongs_to和has_one association：Singular eg submission

<强> student.rb：

class Student < ActiveRecord::Base
  has_many :student_submissions
  has_many :submissions, :through => :student_submissions
end

<强> submission.rb：

class Submission < ActiveRecord::Base
  belongs_to :form

  has_many :student_submissions
  has_many :students, :through => :student_submissions
end

<强> student_submission.rb：

class StudentSubmission < ActiveRecord::Base
  # join_table_name: students_submissions
  belongs_to :submission
  belongs_to :student
end

您还需要更改使用它们的关联

@student_submission = @submission.student_submissions.build

将student_id连接到Rails中的submission_id

1 个答案: