I have students that belong to a submission and I need a drop down that shows the students so the user can choose one of them. I tried to use this but it's not working:
<%= collection_select(:student_name, :submission_id, Submission.all, :form_id, :title) %>
submission.rb:
class Submission < ActiveRecord::Base
belongs_to :form
has_one :student
end
student.rb:
class Student < ActiveRecord::Base
belongs_to :submission
end
submission_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
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
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(:student_name)
end
end
submission form:
<%= form_for([@form, @submission]) do |f| %>
<% if @submission.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@submission.errors.count, "error") %> prohibited this submission from being saved:</h2>
<ul>
<% @submission.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :conflict %><br />
<%= f.radio_button :conflict, :Yes, required: :true %> Yes<br>
<%= f.radio_button :conflict, :No, required: :true %> No
</div>
<br>
<div class="field">
<%= f.label :computer %><br />
<%= f.radio_button :computer, :Yes, required: :true %> Yes<br>
<%= f.radio_button :computer, :No, required: :true %> No
</div>
<br>
<div class="field">
<%= f.label :am_pm %><br />
<%= f.radio_button :am_pm, :Am, required: :true %> Am<br>
<%= f.radio_button :am_pm, :Pm, required: :true %> Pm
</div>
<br>
<div class="field">
<%= f.label "Student" %><br />
<%= collection_select(:student_name, :submission_id, Submission.all, :form_id, :title) %>
</div>
<br>
<div class="field">
<%= f.label :extra_time %><br />
<%= f.radio_button :extra_time, 25, required: :true %> 25%<br>
<%= f.radio_button :extra_time, 50, required: :true %> 50%
</div>
<br>
<div class="actions">
<%= f.submit "Submit", class: "btn btn-primary" %>
</div>
<% end %>
Hope to find an answer! Thanks
