Form with dynamic number of items
dynamic-data, forms, ruby, ruby-on-rails, validation
Solution
Not answering the question directly, but here are some sources to get you there:
- Railscasts: Nested Model Form Part 1
- Railscasts: Nested Model Form Part 2
- Railscasts: Complex Forms Part 3
On a personal note. Your question comes across as asking for someone to do your work for you. I would gladly post an answer to cover all your needs if I was on the clock.
Problem
Just thinking about the best way to build an Order form that would (from user-perspective): - Allow adding multiple items. - Each item has Name, Job Type drop-down and File upload. - User can add or remove items. - User must provide at least one item. - All the items should be validated (eg: Name, JobType and File are required). - When he hits the Submit, an Order should be created with all the items in it. So the model looks like: `User -1---*-Order-1---*- OrderItem-*--1-JobType`. Additionally OrderItem includes number of attributes, let's say `name`, `file`. Now I would like to have as skinny controller as possible. Better with the 'standard' code like: ``` class OrdersController < ApplicationController def create @order = Order.new(params[:order]) if @order.save redirect_to account_url else flash.now[:error] = "Could not save Order" render :action => "new" end end end ``` The most interesting thing is how a view should look like so that rails automatically binds all the values posted to the correct objects? For now I don't worry about degradation from JavaScript, but rather the template for the items to be added and linking all that with the validation (probably as a partial). I expect a template to look like the one below, but not sure. ``` <input type='text' name='order[order_items[name[]]][]' /> <select name='order[order_items[job_type[]]][]'>...</select> <input type='file' name='order[order_items[file[]]][]' /> ``` I have to clone this template in order to add item using JS. So the answer should: - Include the view or part of it that demonstrates: - correct binding of the post values; - correct validation for all items; - Include related part of model. - Include changes to the controller IF and ONLY IF necessary. - (JavaScript is not required) Ideally I would like to see a sample if somebody knows one (maybe somewhere on GitHub). And the last note, please, check your solutions before posting. Thanks, Dmitriy.