Problems adding fields in nested form through jQuery form railscasts episode
i have followed the railscasts episode on nested forms(part 1 and 2) and having difficulty with adding fields using jquery, however when i click the remove fields link, the field gets removed. Here is the code.
In my question model i haveclass Question < ActiveRecord::Base
has_many :tags, :class_name => "Tag", :dependent => :destroy, :foreign_key => "question_id"
accepts_nested_attributes_for :tags, :reject_if => lambda { |a| a[:keyword].blank? }, :allow_destroy => true
In my tag model i have
class Tag < ActiveRecord::Base
attr_accessible :keyword, :question_id
belongs_to :question, :class_name => "Question", :foreign_key => 'question_id'
end
In my question form i have
<%= form_for @question, :url => { :controller => "questions", :action => "create" } do |f| %>
<%= f.label(:name, "Request Question:") %>
<%= f.text_field(:name, :size => 72, :maxlength => 120) %><br />
<%= f.fields_for :tags, :url => { :controller => "tags", :action => "create" } do |builder| %>
<%= render "tag_fields", :f => builder %>
<% end %>
<p><%= link_to_add_fields "Add new tag", f, :tags %></p>
<% end %>
In my tag_fields partial
<p class="fields">
<%= f.label(:keyword, "Keywords:") %>
<%= f.text_field(:keyword, :size => 20, :maxlength => 25) %>
<%= link_to_remove_fields "remove", f %>
</p>
In application_helper.rb
module ApplicationHelper
def link_to_remove_fields(name, f)
f.hidden_field(:_destroy) + link_to_func开发者_Python百科tion(name, "remove_fields(this)")
end
def link_to_add_fields(name, f, association)
new_object = f.object.class.reflect_on_association(association).klass.new
fields = f.fields_for(association, new_object, :child_index => "new_#{association}") do |builder|
render(association.to_s.singularize + "_fields", :f => builder)
end
link_to_function(name, h("add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")"))
end
end
Then finally in my application.js
function remove_fields(link) {
$(link).prev("input[type=hidden]").val("1");
$(link).closest(".fields").hide();
}
function add_fields(link, association, content) {
var new_id = new Date().getTime();
var regexp = new RegExp("new_" + association, "g")
$(link).parent().before(content.replace(regexp, new_id));
}
I have checked to see if files are included in page source. The jquery works because other parts of my app are working. I do not get any error when i click add new tag. I have looked at other solutions, but none work for me. I cannot seem to add a field. Thanks for the help
I managed to figure this on out, but i am not sure if it is the best way.
In application_helper.rb i changed the following line from this
link_to_function(name, h("add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")"))
to this
link_to_function(name, "add_fields(this, '#{association}', '#{escape_javascript(fields)}')", :remote => true)
i am not 100% sure why it works, but i believe its got to do with rails 3 no longer having the link_to_function. Hope this help
精彩评论