Hi All
I’m trying to create an ActiveRecord object ‘directly’ from some JSON
data.
By ‘directly’ - I mean without ‘walking’ the parsed JSON data, but
rather
just passing the parsed JSON data to a method that will process all the
data.
To keep the question simple - let’s say I have two objects. A Survey
and a
Question. Each Survey can have many Questions.
Here’s a script containing the json data and my attempt at creating an
ActiveRecord object directly from the json string …
begin test.rb script
json = '{
“name”:“Fundraising Survey”,
“description”:“A survey about a fundraiser”,
“questions”:[
{“text”:“How clearly did our organization explain our fundraising
goals?”},
{“text”:“Was the cost of attending our fundraiser too high, too low,
or
about right?”}
]
}’
survey = Survey.new
survey.attributes = ActiveSupport::JSON.decode(json)
end test.rb script
For reference = here is the ruby code for the Survey and Question
classes
…
class Survey < ActiveRecord::Base
has_many :questions, :dependent => :destroy
accepts_nested_attributes_for :questions, :allow_destroy => true,
:reject_if => lambda {|attrs|
attrs[‘text’].blank? }
attr_accessible :name, :description
end
class Question < ActiveRecord::Base
belongs_to :survey
acts_as_list :scope => :survey
validates_presence_of :text, :message => ‘Text can not be blank’
attr_accessible :survey_id, :text
end
I get this error when I run the test.rb script (see code snippet above)
…
/Users/dse/.rvm/gems/ruby-1.9.3-p327@sq/gems/activerecord-3.2.9/lib/active_record/associations/association.rb:204:in
`raise_on_type_mismatch’: Question(#70357035179920) expected, got
Hash(#70357017137920) (ActiveRecord::AssociationTypeMismatch)
Any help would be greatly appreciated.
Thanks again
Dave