Multi-step form with user-input and external web-service
I am building a Booking model in Rails 3.2.3 where a user steps through several form-screens of choices. If the form exactly mirrored the underlying model I know I could use a gem (e.g. Wicked gem) to build a multi-step form. The issue I am having is that on one of the form-screens there are multiple options for the user and within each of those options there are multiple options coming from an external web-service. In other words, on step 2 of the multi-step process, the form presents the user with many options of Rates from our database and for each Rate we have multiple additional options from the web-service. So a user would need to choose one of the options from the web-service (radio buttons) and then make a selection of their Rate of choice. This is then repeated multiple times on this page (although the user can only choose one radio-button option from the web-service and one Rate).
Where I am unsure of best practice is that I can display the multiple options from the web-service as radio buttons but there is a Hash of values associated with each of those options and hence with each of those radio buttons.
So, the question is, should I be attempting to pass that Hash as a param to the next step of the form process or should I be making that into an object and passing that or something else entirely!
I know this is a long explanation but I feel it's a critical point in the design of this workflow and I want to get it right.
Many thanks in advance,
Thinking it through again, the initial problem is how to represent a series of radio buttons when each radio button represents many values as opposed to say an id (in this instance each radio button represents a hash of values from the external web-service). Should the hash be made into an object and this passed instead - something along those lines?
I figured this out. On inspecting the "hash" coming back from the external web-service, I noticed that date fields were not in quotes, e.g.
:departs=>Wed, 21 Aug 2013 10:40:00 +0000
whereas all the other fields were in quotes. This made me a little suspicious. So in the end I used to_json on the returned hash:
response_hash_from_webservice = data.to_json
In the form I then used:
JSON.parse(response_hash_from_webservice).each do |nested_item| # Access elements like so ... nested_item['company_name'] etc ... end
However I needed to post this nested_item through to a next step of the form (as a radio button) and it only worked by again using to_json.
<%= radio_button_tag 'nested_item', nested_item.to_json %>
I could then post this value or put it in the session and on the following form page use:
require 'json' hash = JSON.parse session[:nested_item]
And then access the values as normal:
<%= nested_item['company_name'] %>