Comments on: Ruby on Rails – Insert Multiple Child Records

By: shridevi

shridevi — Fri, 11 Jan 2008 06:31:18 +0000

Thanks for explaining the difference between check_box and check_box_tag my part of my problem got solved,but when I am checking more than one box only one id is getting saved in the join table.Please help me hres the code I am trying

html

controller
params[:o].collect do |os_id|

@complist=CompanyListingsOperatingSystems.new(:company_listing_id=>@a,:operating_system_id=>os_id) if os_id != nil
@complist.save

By: O'Malley

O'Malley — Mon, 26 Nov 2007 14:59:11 +0000

The relevant portion of the code is this line above:

@invoice.invoice_items < < InvoiceItem.new(:item_id => item_id)

From http://corelib.rubyonrails.org/classes/Array.html#M000405 :

Append—Pushes the given object on to the end of this array. This expression returns the array itself, so several appends may be chained together.

The "<<" is the aggregate method which allows you to append multiple rows to your invoice.invoice_items object.

This little bit I wrote is probably out of date, so your mileage may vary. I’d check a more definitive source at one of the ruby on rails community sites or http://api.rubyonrails.com/

By: Rohit

Rohit — Mon, 26 Nov 2007 14:17:56 +0000

Hi,

I want to insert multiple rows at once in the database. My functionality is to add product prices against different quantities. I have a table named productprices in the database. Now I require to insert product_id, quantity and price in the table as number of times as there are quantities corresponding to the particular product but not able to do so.

Can you tell me how to implement this functionality.

My view is:

But i am not able to access these quantities and prices in controller.

Please help me in implementing the functionality.

By: O'Malley

O'Malley — Sat, 21 Jul 2007 03:33:03 +0000

Why yes I do. Here’s a hint. Checkboxes are not what you need. Try radio.

By: ravvuinn

ravvuinn — Sat, 21 Jul 2007 00:42:31 +0000

Hey! Almost informative for my purpose…. was wondering if you know how to do the following:

build a quiz question with five multiple choice answers, using checkboxes to pass the correct answer_id into the correct answer_id column in the questions table.

By: varma

varma — Fri, 13 Jul 2007 12:41:32 +0000

in rhtml—

“line_cartitem[cartitem_id][]“, :id => “line_cartitem_id_#{Product.id}”} %>
in controller—
def select
@product = Product.new(params[:product])
@product.order_id = @session["order_id"]
for cartitem_id in params[:product_cartitem][:cartitem_id] do
@product.product_cartitems cartitem_id)
end
if @product.save
flash[:notice] = ‘selected items was saved’
redirect_to :action => ‘add_to_cart’
else
render :action => ‘index’
end
end

i am geeting error as
undefined method `order_id=’ for #

By: mahesh

mahesh — Fri, 13 Jul 2007 12:38:30 +0000

hai
thank u for giving the detailed explation on this, but when i done the same as u did its geeting an error. i am trying for three days please help me

Errorundefined method `order_id=’ for #

By: Florian

Florian — Wed, 27 Sep 2006 11:19:27 +0000

Ahh, I hate commentsystems without preview because I’m to lazy to read my source in this tiny textbox…

-class InvoiceItem +class InvoiceItem < Item

By: Florian

Florian — Wed, 27 Sep 2006 11:16:12 +0000

If you do STI you could possibliy say: @invoice.invoice_items = InvoiceItems.find params[:invoice_items] Wherefor you tell your InvoiceItem Model:

class InvoiceItem
And finally change the name of your checkbox tag:

<%= check_box_tag ‘line_item’, item.id, checked=false, {:name => "invoice_items[]", :id => "line_item_id_#{item.id}" } %>

By: O'Malley

O'Malley — Thu, 27 Jul 2006 13:02:43 +0000

Thanks for the tip, whoever (if that is your real name ) Active Record is indeed an amazing thing.

Thanks for the heads up on transaction