I have two models that I would like to create with one form. I tried following this railscasts tutorial, but I just can't get the nested fields to display on the form. How can I make these nested fields appear?
Models
class Poll < ActiveRecord::Base
has_many :poll_answers, :dependent => :destroy
accepts_nested_attributes_for :poll_answers, allow_destroy: true
end
class PollAnswer < ActiveRecord::Base
belongs_to :poll
end
Controller
class PollsController < ApplicationController
def new
#poll = Poll.new
2.times { #poll.poll_answers.build }
end
private
def poll_params
params.require(:poll).permit([
:question,
poll_answers_attributes: [:answer]
])
end
end
View
<%= form_for(#poll) do |f| %>
<div class="field">
<%= f.label :question %><br>
<%= f.text_field :question %>
</div>
<% f.fields_for :poll_answers do |pa| %>
<p>Hello
<%= pa.text_field :answer %>
</p>
<% end %>
<%= debug #poll.poll_answers %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
You missed an =
<%= f.fields_for :poll_answers do |pa| %>
<p>Hello
<%= pa.text_field :answer %>
</p>
<% end %>
Related
I was following this RailsCast about Nested Model Form, but something seems weird.
Here is Model relationship
class Question < ActiveRecord::Base
belongs_to :survey
end
class Survey < ActiveRecord::Base
has_many :questions
accepts_nested_attributes_for :questions
end
_form.html.erb(created by scaffold)
<div class="field">
<%= f.label :name %><br>
<%= f.text_field :name %>
</div>
<% f.fields_for :questions do |builder| %>
<div class ='question'>
<%= builder.label :content, "Question" %>
<br>
<%= builder.text_area :content, :rows => 3 %>
</div>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
survey_controller.rb
# GET /surveys/new
def new
#survey = Survey.new
3.times do |i|
#survey.questions.build
end
end
I was expecting it will display like
However,it didn't display 3 blocks of question.
You've missed a very small but important part of the form - actually outputting the f.fields_for call.
You need to call <%= f.fields_for :question (note the =) to actually output the generated form.
I have two models in my app: "WorkPost" and "Contacts".
WorkPost
class WorkPost < ActiveRecord::Base
has_one :contacts
end
Contacts
class Contacts < ActiveRecord::Base
belongs_to :work_post
end
In my controller's new method I do:
def new
#work_post = WorkPost.new
#work_post.contacts
end
And in view I create form:
<%= form_for(#work_post) do |f| %>
<div class="field">
<%= f.label 'Vacation' %><br>
<%= f.text_field :post_title, :placeholder => 'Vacation here' %>
</div>
<div class="field">
<%= f.label 'Vacation description' %><br>
<%= f.text_area :post_body, :placeholder => 'Vacation description here' %>
</div>
<% f.fields_for :contacts do |cf| %>
<div class="field">
<%= cf.label 'Email' %><br>
<%= cf.text_field :emails, :placeholder => 'Email here' %>
</div>
<% end %>
<div class="actions">
<%= f.submit "Post vacation", :class => 'btn_act' %>
</div>
<% end %>
But it seems like line <% f.fields_for :contacts do |cf| %> doesn't work.
Everything is rendered fine but email field.What I am doing wrong?
The problem is with this line
<% f.fields_for :contacts do |cf| %>
which should be
<%= f.fields_for :contact do |cf| %>
Also, the class name for the model and the association name for has_one/belongs_to should be singular.
#work_post.rb
class WorkPost < ActiveRecord::Base
has_one :contact #should be singular
end
#contact.rb
class Contact < ActiveRecord::Base #should be singular
belongs_to :work_post
end
Also, notice the change :contacts to :contact, as it is a has_one association.
Update:
Also, try the below changes
Include accepts_nested_attributes_for :contact in work_post.rb model
#work_post.rb
class WorkPost < ActiveRecord::Base
has_one :contact
accepts_nested_attributes_for :contact
end
Change the new method to below
def new
#work_post = WorkPost.new
#work_post.build_contact
end
I just started learning Rails 4.2. The problem is that one field in the form is not being displayed.
I have restaurant, category and a dish. While creating a dish, the category and restaurant will also be inputted via /dishes/new.
Expected behaviour: Dish, Category and Restaurant fields are displayed.
Actual behaviour: Only Dish and Category fields are displayed.
Here are my models
models/restaurant.rb
class Restaurant < ActiveRecord::Base
has_many :categories
has_many :dishes, :through => :categories
end
models/category.rb
class Category < ActiveRecord::Base
belongs_to :restaurant
has_many :dishes
end
models/dish.rb
class Dish < ActiveRecord::Base
belongs_to :category
validates :name, :price, :category, :restaurant, :presence => true
accepts_nested_attributes_for :restaurant, :category
end
dish controller
def new
# I think this is where
# I am making a mistake
#dish = Dish.new
category = #dish.build_category
restaurant = category.build_restaurant
end
def create
#dish = Dish.new(dish_params)
respond_to do |format|
if #dish.save
.... # default stuff #
end
end
end
# strong params
def dish_params
params.require(:dish).permit(:name, :description, :price, restaurant_attributes: [:name], category_attributes: [:name])
end
Dishes views/dishes/_form.html.erb
<%= form_for(#dish) do |f| %>
<% if #dish.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#dish.errors.count, "error") %> prohibited this dish from being saved:</h2>
<ul>
<% #dish.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :nameWoW %><br>
<%= f.text_area :name %>
</div>
<div class="field">
<%= f.label :description %><br>
<%= f.text_area :description %>
</div>
<div class="field">
<%= f.label :price %><br>
<%= f.number_field :price %>
</div>
*** The restaurant name field is not being displayed **
<%= f.fields_for :restaurant do |restaurant| %>
<div class="field">
<%= restaurant.label :Restname %><br>
<%= restaurant.text_area :name %>
</div>
<% end %>
<%= f.fields_for :category do |category| %>
<div class="field">
<%= category.label :Catname %><br>
<%= category.text_area :name %>
</div>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
I have followed steps from rails guide, browsed questions on stackoverflow and read some blog posts as well but havent been able to figure out whats wrong. Some micro level mistake is blocking me :( . Anyone knows whats wrong ?
Thanks in advance.
UPDATE:
Hey I found a solution.
def new
#dish = Dish.new
#dish.build_category
#dish.category.build_restaurant
end
This works well.But this is just a part of the actual solution. I had to do lot of /dish/create controller modification as well. I think the entire solution will have to be put in blog post. Otherwise it wont make any sense. I will soon be posting and updating it here.
You can add this in your dish.rb
class Dish
delegate :restaurant, to: :category
end
Or you can do
<%= f.fields_for :restaurant, #dish.category.restaurant do |restaurant| %>
<div class="field">
<%= restaurant.label :Restname %><br>
<%= restaurant.text_area :name %>
</div>
<% end %>
I think you are missing:
class Dish
belongs_to :restaurant, through: :category
end
You have it on the other side (many) but not there. You could test this by trying to output #dish.restaurant on your form (should be empty but not nil).
def new
# I think this is where
# I am making a mistake
#dish = Dish.new
category = #dish.category.build
restaurant = category.restuarant.build
end
I am building a dynamic form for a client. A form has many form questions which has many form answers. As of now, I am able to create everything nicely in Active Admin and have it displaying through the show action on the app interface. Here is the problem I have. I want to display the form title (which is working), along with the form questions (which is working), along with input fields to submit new form answers on the fly (which is the part that is not working). I feel like I have exhausted everything when it comes to nested forms. I will post my code below.
Form
<%= form_for #form do |f| %>
<div class="field">
<h1><%= #form.name %></h1>
</div>
<%= f.fields_for :form_questions do |ff| %>
<div class="field">
<%= ff.label :title %>
<%= ff.text_field :form_answers %>
</div>
<% end %>
<div class="form-actions">
<%= f.button :submit %>
</div>
<% end %>
Here is the models
class Form < ActiveRecord::Base
has_many :form_questions, dependent: :destroy
accepts_nested_attributes_for :form_questions, allow_destroy: true
end
class FormQuestion < ActiveRecord::Base
belongs_to :form
has_many :field_types
has_many :form_answers, dependent: :destroy
accepts_nested_attributes_for :field_types
accepts_nested_attributes_for :form_answers
end
class FormAnswer < ActiveRecord::Base
belongs_to :form_question
end
And my form controller
class FormsController < ApplicationController
def new
#form = Form.new
# form_questions = #form.form_questions.build
# form_answers = form_questions.form_answers.build
end
def create
#form = Form.new(form_params)
end
def index
#forms = Form.includes(:form_questions).all
end
def show
#form = Form.find(params[:id])
end
def edit
#form = Form.find(params[:id])
end
def form_params
params.require(:form).permit(:id, :name, form_questions_attributes: [:title, form_answers_attributes: [:answer]])
end
end
Firstly,you should uncomment those two lines in your new method.I guess they are correct.
def new
#form = Form.new
#form_questions = #form.form_questions.build
#form_answers = #form_questions.form_answers.build
end
And in your create action,you are not saving the data
def create
#form = Form.new(form_params)
if #form.save
.....
else
.....
end
end
Secondly,your form code should look like this
<%= form_for #form do |f| %>
<div class="field">
<h1><%= #form.name %></h1>
</div>
<%= f.fields_for #form_questions do |ff| %>
<div class="field">
<%= ff.label :title %>
<%= ff.text_field :title %>
</div>
<%= ff.fields_for #form_answers do |fa| %> #Here comes the important step
<div class="field" %>
<%= fa.label :answer %>
<%= fa.text_field :answer %>
</div>
<% end %>
<% end %>
<div class="form-actions">
<%= f.button :submit %>
</div>
<% end %>
I am learning RoR and i am trying to find how to set a fields_for in another one with has_one models like this:
class Child < ActiveRecord::Base
belongs_to :father
accepts_nested_attributes_for :father
end
class Father < ActiveRecord::Base
has_one :child
belongs_to :grandfather
accepts_nested_attributes_for :grandfather
end
class Grandfather < ActiveRecord::Base
has_one :father
end
I used Nested Model Form Part 1 on Railscasts to get these:
In children_controller.rb:
def new
#child = Child.new
father=#child.build_father
father.build_grandfather
end
def child_params
params.require(:child).permit(:name, father_attributes:[:name], grandfather_attributes:[:name])
end
And my form:
<%= form_for(#child) do |f| %>
<div class="field">
<%= f.label :name %><br>
<%= f.text_field :name %>
</div>
mother:<br>
<%= f.fields_for :father do |ff| %>
<%= ff.label :name %>
<%= ff.text_field :name %><br>
grand mother:<br>
<%= f.fields_for :grandfather do |fff| %>
<%= fff.label :name %>
<%= fff.text_field :name %>
<% end %>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
I am trying to retrieve the datas with:
<%= child.father.name %>
<%= child.father.grandfather.name %>
but the grandfather's name won't work.
I cannot find the mistake(s)...anyone to help on this?
Thanks!
Try switching:
<%= f.fields_for :grandfather do |fff| %>
to:
<%= ff.fields_for :grandfather do |fff| %>
And switching:
params.require(:child).permit(:name, father_attributes:[:name], grandfather_attributes:[:name])
To:
params.require(:child).permit(:name, father_attributes:[:name, grandfather_attributes:[:name]])