Postgres JSON data type Rails query

Question

I am using Postgres\' json data type but want to do a query/ordering with data that is nested within the json.

I want to order or query with .where on the json data

Answer 1

According to this http://edgeguides.rubyonrails.org/active_record_postgresql.html#json there's a difference in using -> and ->>:

# db/migrate/20131220144913_create_events.rb
create_table :events do |t|
  t.json 'payload'
end

# app/models/event.rb
class Event < ActiveRecord::Base
end

# Usage
Event.create(payload: { kind: "user_renamed", change: ["jack", "john"]})

event = Event.first
event.payload # => {"kind"=>"user_renamed", "change"=>["jack", "john"]}

## Query based on JSON document
# The -> operator returns the original JSON type (which might be an object), whereas ->> returns text
Event.where("payload->>'kind' = ?", "user_renamed")

So you should try Record.where("data ->> 'status' = 200 ") or the operator that suits your query (http://www.postgresql.org/docs/current/static/functions-json.html).