mysql - Adding multiple records in Rails -

i'm newbie stumbling way through creating first rails application. i'm trying add multiple records table nested form, , @ moment, last record being added.

i'm working on form allow user associate mathematics equation how should read under given reading rule. in abstract view, 2 simple records be:

equation: "x-3", readingrule:"simple", transcription"x take away three"  equation: "x-3", readingrule:"standard", transcription"x minus three" 

i have 4 tables: 'equations', 'transcriptions', 'readingrulesets', , 'tests'. single test consists of ids of equation, transcription, , readingruleset.

i have form, has text field user select id of equation, , 4 text fields (associated 4 reading rule sets) them select id of transcriptions. when hit submit, want 4 new 'tests' added, 1 each of transcriptions. @ moment, rails adding last one.

i thought because id's of text fields same in html source. tried concatenating field name index each_with_index, left me 1 record being added 'test', , reading_rule_set_id null because i'd amended name of column index. i've taken out, read lot more, watched railscasts 196, , i'm still stuck.

relevant bits of code:

\app\models\test.rb

class test < activerecord::base   has_many :equations   has_many :reading_rule_sets   has_many :transcriptions   accepts_nested_attributes_for :equations :transcriptions :reading_rule_sets end 

the other 3 tables have respective 'belongs_to's.

\app\views\tests:

<div>     <fieldset>         <legend> reading rules , transcriptions </legend>             <% readingruleset.all.each_with_index |rrs, index| %>                 <div class="row">                     <div class="col-md-6">                         <label><%= rrs.name %></label>                     </div>                     <div class="col-md-6">                         <%= f.text_field :transcription_id %>                         <%= f.hidden_field :reading_rule_set_id, :value =>rrs.id %>                         <!--# .to_s + index.to_s-->                     </div>                 </div>             <% end %>     </fieldset> </div>  <div class="actions">     <%= f.submit %> </div> 

app\controllers\tests_controller.rb

# post /tests # post /tests.json def create @test = test.new(test_params)  respond_to |format|   if @test.save     format.html { redirect_to @test, notice: 'test created.' }     format.json { render :show, status: :created, location: @test }   else     format.html { render :new }     format.json { render json: @test.errors, status: :unprocessable_entity }   end end end  # patch/put /tests/1 # patch/put /tests/1.json def update respond_to |format|   if @test.update(test_params)     format.html { redirect_to @test, notice: 'test updated.' }     format.json { render :show, status: :ok, location: @test }   else     format.html { render :edit }     format.json { render json: @test.errors, status: :unprocessable_entity }   end end end  private     # use callbacks share common setup or constraints between actions.     def set_test       @test = test.find(params[:id])     end  # never trust parameters scary internet, allow white list through. def test_params   params.require(:test).permit(:equation_id, :reading_rule_set_id, :transcription_id, :transcription_transcription) end 

check test_params.

see rails guide nested-form

for information, possible nested of nested , nested polymorphic model.

#example def class_info_params   params.require(:class_info).permit(.....     classes_attributes : [:id, :_destroy, , class_times_attributes:[:id, :day, :start_time, :_destroy]],     my_subcategories_attributes: [:id,:_destroy, :subcategoriable_id, :subcategoriable_type, :subcategory_id]) end 

but think better pass json data (made js json.stringify) because of complexity(?), intuition(?) , above all, front-end framework (e.g. angularjs (ng-model))

p.s. (?) means me.