Add an index to a form

Rails
1

Hello,

I’m having some trouble with forms, my app allows to enter data by
using a multi-step form that has 7 steps.
There are 3 steps that may let the user to add 1 form, for example
there’s a step called “children”
and that children has the following fields:

in the “invite” partial
_invite.html.erb
<%= fields_for “user[invites_attributes][]”, invite do |i| %>

  • <%= link_to("Remove", "#delete", :class => "delete-invite") %> <%= i.label :full_name, "Full Name" %> <%= i.text_field :full_name %> <%= i.label :email, "Email Address" %> <%= i.text_field :email %>
    • <% end %>

    I’m having some troubles with the first line: <%= fields_for
    “user[invites_attributes][]”, invite do |i| %>
    What is the correct usage of that? I’m using formtastic and when I
    made that line but with my fields

     <%= f.semantic_fields_for ("user[children_attributes][]", user)

    do |fes| %>

    and I get this error

    … unexpected ‘,’, expecting ‘)’

    I hope someone can help

    Thanks in advance

    2

    On Oct 26, 2011, at 11:53 AM, JavierQQ wrote:

    but one father may have more than 1 child and I’m adding another form
    with ajax by following this

    I haven’t followed that particular tutorial, but I have used the
    Railscasts (73 - 75) and Ryan B.’ fabulous nested_form gem. Note that
    the 'casts show how to do it long-hand, and the gem simply wraps up all
    that work and puts a bow on it. You can probably simply follow the
    directions from the gem and get on with your life if you already know
    the theory.

    Walter

    3

    On 26 October 2011 16:53, JavierQQ [email protected] wrote:

    but one father may have more than 1 child and I’m adding another form
    <%= i.label :email, “Email Address” %>
    <%= i.text_field :email %>

    <% end %>

    I’m having some troubles with the first line: <%= fields_for
    “user[invites_attributes][]”, invite do |i| %>
    What is the correct usage of that? I’m using formtastic and when I
    made that line but with my fields

    <%= f.semantic_fields_for (“user[children_attributes][]”, user)

    You should not have a space between semantic_fields_for and (. That
    is ruby syntax. Whether it fixes you problem is another matter.

    Colin

    –
    You received this message because you are subscribed to the Google G. “Ruby
    on Rails: Talk” group.
    To post to this group, send email to [email protected].
    To unsubscribe from this group, send email to
    [email protected].
    For more options, visit this group at
    http://groups.google.com/group/rubyonrails-talk?hl=en.

    –
    gplus.to/clanlaw

    4

    On Oct 26, 2011, at 11:53 AM, JavierQQ wrote:

    but one father may have more than 1 child and I’m adding another form
    <%= i.label :email, “Email Address” %>
    do |fes| %>

    and I get this error

    … unexpected ‘,’, expecting ‘)’

    I hope someone can help

    Thanks in advance

    I think that the space after f.semantic_fields_for and the parentheses
    around the argument list are interacting to produce the error.

    I think that you can probably do either fix and resolve the issue:

     <%= f.semantic_fields_for "user[children_attributes][]", user do |

    fes| %>

     <%= f.semantic_fields_for("user[children_attributes][]", user) do

    |fes| %>

    -Rob

    Rob B.
    [email protected] http://AgileConsultingLLC.com/
    [email protected] http://GaslightSoftware.com/

    5

    In the casts I’ve seen this

    <%= render :partial => 'task', :collection => @project.tasks %>

    so as far as I understand theres a file _task.html.erb, but they
    create tasks by building it in the controller
    should I do something like that?, I mean
    <%= render “children”, :collection => @user.childrens %>

    6

    Thanks for your reply,

    I’ve seen that cast, but when I add another form for another children
    the
    HTML shows this

    so it’s not increasing and it will only save the first child

    and now I’m trying what the cast says

    _children.html.erb

    <%= f.semantic_fields_for “user[children][]”, user do |children| %>
    …
    <% end %>

    and I get this

    undefined local variable or method `user’

    It’s maybe something I’m not seeing, I’m starting with rails and I hope
    someone can help me

    Thanks

    7

    On Oct 26, 2011, at 12:17 PM, Javier Q. wrote:

    _children.html.erb

    <%= f.semantic_fields_for “user[children][]”, user do |children| %>
    …
    <% end %>

    and I get this
    undefined local variable or method `user’

    It’s maybe something I’m not seeing, I’m starting with rails and I hope someone
    can help me

    Here’s an extraction from a site that’s using Ryan’s plug-in (a person
    can have N images):

    #people_controller.rb
    …
    def new
    @person = Person.new
    @person.images.build
    end
    …

    #person.rb
    class Person < ActiveRecord::Base
    attr_accessible :images_attributes, :name, :sort_name, :birth, :death,
    :nationality, :historical_period, :short_description, :bio
    has_many :images, :as => :attachable, :dependent => :destroy
    accepts_nested_attributes_for :images, :reject_if => lambda { |a|
    a[:file].blank? && a[:file_uid].blank? && a[:file_url].blank? &&
    a[:name].blank? }, :allow_destroy => true
    validates :name, :presence => true
    validates :nationality, :presence => true
    validates :historical_period, :presence => true
    end

    #image.rb
    class Image < ActiveRecord::Base
    attr_accessible :name, :attachable_type, :attachable_id, :file_name,
    :file_url, :file_uid, :file, :retained_file, :remove_file, :created_at,
    :file_height, :updated_at, :file_width
    image_accessor :file
    belongs_to :attachable, :polymorphic => true
    def label
    name.blank? ? file_name : name
    end
    end

    #people/_form.html.erb
    <%= nested_form_for @person, :url => person_path(@person, :page =>
    params[:page]), :html => {:multipart => true} do |f| %>
    <%= f.error_messages %>

    …

    <%= f.fields_for :images %>

    <%= f.link_to_add "Add an image", :images %>

    <%= f.submit %>

    <% end %>

    #people/_image_fields.html.erb (this name is critical to success)

    <%- if f.object.file_uid -%> <%= link_to( image_tag( f.object.file.thumb('60x60#').url, :class => 'border', :size => '60x60' ), f.object.file.url, :target => '_blank') %>
    <%= f.object.file_width %> <%= f.object.file_height %>     <%= f.link_to_remove "Delete", :class => 'delete' %> <%- else -%> <%= image_tag( 'thumb_new.jpg', :class => 'border', :size => '60x60' ) %> <%- end -%> <%= f.label :name %> <%= f.text_field :name %>
    <%= f.label :file, "Upload" %> <%= f.file_field :file %> <%= f.hidden_field :retained_file %>
    <%= f.label :file_url, "Upload From URL" %> <%= f.text_field :file_url %>

    That is quite literally all there is to it, except to follow the rest of
    the install directions on the Github page.

    Walter