I have a model Contact which has a many-to-many relationship with Company:
class Contact < ActiveRecord::Base has_many :contactcompanies
has_many :companies, through: :contactcompanies
Company model:
class Company < ActiveRecord::Base
has_many :contactcompanies
has_many :contacts, through: :contactcompanies
ContactCompany:
class ContactCompany < ActiveRecord::Base
belongs_to :company
belongs_to :contact
contacts_controller.rb:
def new
#contact = Contact.new
#all_companies = Company.all
#contact_company = #contact.contactcompanies.build
end
contact create form where I want to have a multiple select for companies:
<%= form_for #contact do |f| %>
<%= f.label :first_name %>
<%= f.text_field :first_name %>
<%= f.label :last_name %>
<%= f.text_field :last_name %>
<%= f.label :image_url %>
<%= f.text_field :image_url %>
<%= f.label :email %>
<%= f.text_field :email %>
<%= fields_for(#contact_company) do |cc| %>
<%= cc.label "All Companies" %>
<%= collection_select(:companies, :id, #all_companies, :id, :name, {}, { :multiple => true }) %>
<% end %>
<div class="form-action">
<%= f.submit nil, :class => 'btn btn-primary' %>
<%= link_to t('.cancel', :default => t("helpers.links.cancel")),
contacts_path, :class => 'btn' %>
</div>
<% end %>
My issue is when I go to /contacts/new I get this error:
Circular dependency detected while autoloading constant Contactcompany
Any ideas? I'm searching for hours without success. Thanks
You have declared your class as "ContactCompany"
This implies:
has_many :contact_companies
has_many :contacts, through: :contact_companies
Without the underscore, it is looking for a class named Contactcompany, which does not exist.
Related
I have a User model as below,
class User < ActiveRecord::Base
devise :database_authenticatable, :registerable
has_many :company_users
accepts_nested_attributes_for :company_users, :allow_destroy => true
has_many :companies, :through => :company_users
has_many :roles, :through => :company_users
end
and its associated model CompanyUser as below,
class CompanyUser < ActiveRecord::Base
belongs_to :user
belongs_to :company
belongs_to :role
end
I am trying to build the associations as below but it seems like not working
# GET /users/new
def new
#user = User.new
#user.company_users.build
end
View file is as follows,
<%= form_for(#user) do |f| %>
<div class="field">
<%= f.label :name %><br>
<%= f.text_field :name %>
</div>
<div class="field">
<%= f.label :email %><br>
<%= f.text_field :email %>
</div>
<h3>Companies and Roles</h3>
<div class="field">
<% f.fields_for :company_users do |cu| %>
<p>
<%= cu.label :company_id %>
<%= cu.text_field :company_id%>
<%= cu.label :role_id %>
<%= cu.text_field :role_id %>
<%= cu.check_box :_destroy %>
<%= cu.label :_destroy, 'delete' %>
</p>
<% end %>
<p>
<%= f.submit 'Add to user', :name => "add_company_user" %>
<%= f.submit 'Delete from user', :name => "remove_company_user" %>
</p>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
I am trying to figure out where it is going wrong.
You are missing a =, therefore the fields_for block isn't rendered to the page. Change this line
<% f.fields_for :company_users do |cu| %>
to
<%= f.fields_for :company_users do |cu| %>
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'm trying to manage invitations to an event with a "participation" model. I'd like that, when I invite a user, i could insert his name in the form, instead of user_id.
user.rb
class User < ActiveRecord::Base
attr_accessible :id, :name
has_many :participations
end
participation.rb
class Participation < ActiveRecord::Base
attr_accessible :event_id, :user_id
belongs_to :event
belongs_to :user
end
views/participations/new.html.erb
<%= form_for(#participation) do |f| %>
<%= f.hidden_field :event_id, value: #event.id %>
<%= f.label :user_id, 'User Id' %>
<%= f.number_field :user_id %>
<%= f.submit 'Invite' %>
<% end %>
How can i do?
Try by this:
<%= form_for(#participation) do |f| %>
<%= f.hidden_field :event_id, value: #event.id %>
<%= f.label :user_id, 'User Id' %>
<%=f.collection_select :user_id,User.all,:id,:name,:label => "User" ,:include_blank => false%>
<%= f.submit 'Invite' %>
<% end %>
You may turn include_blank to true or false as you wish to always have a user or not.
Feel free to ask for more if this doesn't solve your problem.
How do you correctly fill in the following syntax to create a dropdown select tag with each option being the data of another table?
<%= form_for(#celebrity, :html => { :multipart => true }) do |f| %>
<%= f.label :name %>
<%= f.text_field :name %>
<%= f.label :image %>
<%= f.file_field :image %>
<%= f.label :character %>
<%= f.collection_select(:character, :celebrity_id, #characters, :id, :name) %> #this line is the question
<%= f.submit 'Save' %>
<% end %>
I followed the API documentation here, but it doesn't seem to work.
http://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsHelper.html#method-i-collection_select
class Celebrity < ActiveRecord::Base
has_many :characters, through: :char_celeb_joins
has_many :char_celeb_joins
has_many :universes, through: :characters
end
class Character < ActiveRecord::Base
has_many :universes, through: :univ_char_joins
has_many :univ_char_joins
has_many :celebrities, through: :char_celeb_joins
has_many :char_celeb_joins
end
class Universe < ActiveRecord::Base
has_many :characters, through: :char_univ_joins
has_many :char_univ_joins
has_many :celebrities, through: :characters
end
But I get a
undefined method 'merge' for :name:Symbol
in the browser, when I go to a view that brings up this code.
NoMethodError in Celebrities#edit
The error is due to this line
<%= f.collection_select(:character, :celebrity_id, #characters, :id, :name) %>
When using with form_for,you have to set it like this
<%= f.collection_select(:celebrity_id, #characters, :id, :name) %>
And also your form_for object is #celebrity and you are giving :character as object to collection_select.It should be :celebrity in the collection_select too.Ofcourse you have worry about this when using collection_select without form_for.In your case it would be
<%= collection_select(:celebrity, :celebrity_id, #characters, :id, :name) %>
You can use helper:
Writer this code in any of the helper:
def character_for_select
Character.all.collect { |m| [m.id, m.name] }
end
Update your form
<%= form_for(#celebrity, :html => { :multipart => true }) do |f| %>
<%= f.label :name %>
<%= f.text_field :name %>
<%= f.label :image %>
<%= f.file_field :image %>
<%= f.label :character %>
<%= f.select(:character, character_for_select, :prompt => 'Select character') %>
<%= f.submit 'Save' %>
<% end %>
You will get your answer :)
Have you tried to use options_for_select. In your case, your code should be something like this:
app/helpers...
def options_for_characters( selected=nil )
options = Character.all.map { |c| [d.id, c.name] }
options_for_select( options, selected )
end
app/views...
...
<%= f.select(:character, options_for_characters, :prompt => 'Select character') %>
...
I have this _form file.
<%= form_for(#company) do |f| %>
<%= f.label :name %>
<%= f.text_field :name %>
<%= f.label :company_type %>
<%= f.select :company_type_id, CompanyType.order(:name).map{|x| [x.name, x.id]} %>
<%= f.label :description %>
<%= f.text_area :description %>
<%= f.submit %>
<% end %>
My question is how do I change select
<%= f.select :company_type_id, CompanyType.order(:name).map{|x| [x.name, x.id]} %>
in this form into checkbox list?
CompanyType model:
class CompanyType < ActiveRecord::Base
attr_accessible :name
has_many :companies
end
Company model:
class Company < ActiveRecord::Base
attr_accessible :description, :name, :company_type_id, :website
belongs_to :type, :class_name => "CompanyType", :foreign_key => :company_type_id
end
Try this
<%= f.check_box :company_type_id, CompanyType.order(:name).map{|x| [x.name, x.id]} %>
Try the checkboxes_select method
http://edgeapi.rubyonrails.org/classes/ActionView/Helpers/FormOptionsHelper.html#method-i-collection_check_boxes