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plurals

POIterating through associated objects
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Id
20454745
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ClosedDate
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2013-12-08T14:52:31.567
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2013-12-08T16:22:57.600
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Body
Having set up a has_many through relationship, I'm trying to iterate through associated B objects in the view of an object A. I.e. something like <pre><code><% for q in @survey.questions do %> <%= q.name %> <% end %> </code></pre> yields nothing, while <pre><code><%= @survey.questions %> </code></pre> yields <pre><code>#<ActiveRecord::Associations::CollectionProxy::ActiveRecord_Associations_CollectionProxy_Question:0x007f9859f221e8> </code></pre> How could (should) I access these? <hr> Here's the Controller <pre><code>class SurveysController < ApplicationController before_action :set_survey, only: [:show, :edit, :update, :destroy] def index @surveys = Survey.all end def show end def new @survey = Survey.new end def edit end def create @survey = Survey.new(survey_params) respond_to do |format| if @survey.save format.html { redirect_to @survey, notice: 'Survey was successfully created.' } format.json { render action: 'show', status: :created, location: @survey } else format.html { render action: 'new' } format.json { render json: @survey.errors, status: :unprocessable_entity } end end end def update respond_to do |format| if @survey.update(survey_params) format.html { redirect_to @survey, notice: 'Survey was successfully updated.' } format.json { head :no_content } else format.html { render action: 'edit' } format.json { render json: @survey.errors, status: :unprocessable_entity } end end end def destroy @survey.destroy respond_to do |format| format.html { redirect_to surveys_url } format.json { head :no_content } end end private def set_survey @survey = Survey.find(params[:id]) end end </code></pre> <hr> And here's the Models <pre><code>class Survey < ActiveRecord::Base has_many :assignments has_many :questions, through: :assignments end </code></pre> . <pre><code>class Question < ActiveRecord::Base has_many :assignments has_many :surveys, through: :assignments end </code></pre> . <pre><code>class Assignment < ActiveRecord::Base belongs_to :survey belongs_to :question end </code></pre>
Tags
<ruby-on-rails><ruby-on-rails-4><erb><rails-activerecord>
Title
Iterating through associated objects
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USjiku
UserOwnerUserId
1. USjiku
plurals
PostLinksPostIdRelatedPostId
1. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
2. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
3. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
 singulars
 PostTypePostTypeId
 PTAnswer
3. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId

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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.