Problem with rails 2.1.0 & its older versions in Ask a Rails expert forums on WorkingWithRails

Problem with rails 2.1.0 & its older versions

Authority 12

Posting Rating 0

hi to everyone .i am using rails 2.1.0 for my current project.in the console mode i tried to excute the statement in console mode

User.find(:first,:select=>”name as text,id as value”).to_json

=> “{\”user\”: {\”text\”: \”thillai\”, \”value\”: \”1\”}}”

in rails 2.1.0 its giving the model name user also

but in rails 2.0.2 the results are coming as

{\”text\”: \”thillai\”, \”value\”: \”1\”}

as per my requirement i want results to be

{\”text\”: \”thillai\”, \”value\”: \”1\”}.

Is there any solution for this problem

Ashish Bansal Profile...

about 1 month ago

Authority 25

Posting Rating 49

Aha! One of the Rail 2.1 gotchas:
Changes in Active Record Attribute Filtering

ActiveRecord::Base#attributes does not allow filtering anymore (it does not accept :only, for example). You must do the filtering manually, with something like this:

1: def json_attributes_for(model, *attrs)
2: attrs = [attrs].flatten.map(&:to_s)
3: model.attributes.delete_if{|k,v| !attrs.include?(k) }.to_json
4: end

Called like so:

json_attributes_for(page, :id, :keyword)

From: http://giantrobots.thoughtbot.com/2008/6/19/gotchas-when-upgrading-to-rails-2-1

So you will have to change the way you call it….

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