I am using Rails 3.0.9 and Ruby 1.9.2
Models associations are
document.rb
has_many :sections
accepts_nested_attributes_for :sections, :allow_destroy => :true, :reject_if => proc { |attrs| attrs.all? { |k, v| v.blank? } }
section.rb
belongs_to :document
has_many :paragraphs, :dependent => :destroy
has_many :contents :through => :paragraphs
validates :user_id, :presence => { :message => “Must be filled” }
paragraph.rb
attr_accessible :user_id, :section_id, :content_id
belongs_to :section
belongs_to :content
validates :user_id, :section, :content, :presence => { :message => “Must be filled” }
paragraphs table just like a intermediate table for sections and contents and I want to save records in documents, sections and paragraphs table using single form submission.
_form.html.erb
<%= form_for @document, :validate => true do |f| %>
<%= f.error_messages %>
<div><%= f.text_field :name %></div>
<% f.fields_for :sections do |builder| %>
<div><%= builder.text_field :name %></div>
<div><%= builder.select :content_ids, Content.all.collect {|p| [ p.name, p.id ] },{:prompt => "Please Select"}, {:class => "nhs_select", :multiple => true} %></div>
<% end %>
<%= f.submit :submit%>
<% end %>
Example parameters when submiting the form
{“document”=>{“name”=>“sdf”, “sections_attributes”=>{“0”=>{“name”=>“sdf”, “description”=>“sdf”, “_destroy”=>“0”, “content_ids” => [“1”, “2”]}}, “commit”=>“Create Document”}
In additionally, I should need to update current_user’s id to user_id column of paragraphs table.
def create
@document = Document.new
@document.attributes = params[:document]
@document.sections.each {|section|
section.user_id = current_user.id
section.paragraphs.each {|paragraph| paragraph.user_id = current_user.id}
}
if @document.save!
success
else
render :action => ‘new’
end
end
Problem 1:
At first, I submit the form, rails render new form without error message even I have implemented code to display error messages.
then again clicked submit button, action goes to update method. But it should go to new action.
I inspected in console, the inserted records were rollbacked but still the ID is retain in object.
Example:
Problem 2:
Documentation said that the changes are not saved to the database when assigning the attributes as like user.attributes = {:name => “Rob”}.
but my case validation is triggered when assigning the attributes so I can’t assign the value to user_id column in paragraph object before calling save method
@document.attributes = {“sections_attributes”=>{“0”=>{“name”=>“sdf”, “content_ids” => [“1”, “2”]}}
or
section = Section.first
section.attributes = {“content_ids” => [“1”, “2”]}
How to assign the value to user_id in paragraph object before calling save method
