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allele","parameters":{"drakeId":1,"oldAlleles":"a:T,b:T,a:m,b:M,a:W,b:W,a:h,b:h,a:C,b:C,a:B,b:B,a:fl,b:fl,a:hl,b:hl,a:A1,b:A1,a:D,b:D,a:Bog,b:Bog,a:rh,b:rh","newAlleles":"a:T,b:T,a:m,b:M,a:W,b:w,a:h,b:h,a:C,b:C,a:B,b:B,a:fl,b:fl,a:hl,b:hl,a:A1,b:A1,a:D,b:D,a:Bog,b:Bog,a:rh,b:rh"}},{"session":"e8a14c99-b18a-20a5-1d7e-cea199a1f605","time":1393246903972,"prettyTime":"Mon Feb 24 2014 08:01:43 GMT-0500 (EST)","timeDrift":-18000716,"event":"Changed allele","parameters":{"drakeId":1,"oldAlleles":"a:T,b:T,a:m,b:M,a:W,b:w,a:h,b:h,a:C,b:C,a:B,b:B,a:fl,b:fl,a:hl,b:hl,a:A1,b:A1,a:D,b:D,a:Bog,b:Bog,a:rh,b:rh","newAlleles":"a:T,b:T,a:m,b:M,a:w,b:w,a:h,b:h,a:C,b:C,a:B,b:B,a:fl,b:fl,a:hl,b:hl,a:A1,b:A1,a:D,b:D,a:Bog,b:Bog,a:rh,b:rh"}},{"session":"e8a14c99-b18a-20a5-1d7e-cea199a1f605","time":1393246907580,"prettyTime":"Mon Feb 24 2014 08:01:47 GMT-0500 (EST)","timeDrift":-18000716,"event":"Changed 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Feb 24 2014 08:01:58 GMT-0500 (EST)","timeDrift":-18000716,"event":"Started challenge","parameters":{"title":"Case 7: Challenge 2","route":"case7/challenge2","case":7,"challenge":2}},{"session":"e8a14c99-b18a-20a5-1d7e-cea199a1f605","time":1393246918195,"prettyTime":"Mon Feb 24 2014 08:01:58 GMT-0500 (EST)","timeDrift":-18000716,"event":"Closed info"},{"session":"e8a14c99-b18a-20a5-1d7e-cea199a1f605","time":1393246918492,"prettyTime":"Mon Feb 24 2014 08:01:58 GMT-0500 (EST)","timeDrift":-18000716,"event":"Changed allele","parameters":{"drakeId":2,"oldAlleles":"a:T,b:T,a:m,b:m,a:w,b:W,a:h,b:h,a:C,b:C,a:B,b:B,a:Fl,b:fl,a:hl,b:hl,a:A1,b:A1,a:D,a:Bog,a:rh","newAlleles":"a:T,b:T,a:m,b:m,a:w,b:w,a:h,b:h,a:C,b:C,a:B,b:B,a:fl,b:fl,a:hl,b:hl,a:A1,b:A1,a:D,a:Bog,a:rh"}},{"session":"e8a14c99-b18a-20a5-1d7e-cea199a1f605","time":1393246918713,"prettyTime":"Mon Feb 24 2014 08:01:58 GMT-0500 (EST)","timeDrift":-18000716,"event":"Closed info"},{"session":"e8a14c99-b18a-20a5-1d7e-cea199a1f605","time":1393246918746,"prettyTime":"Mon Feb 24 2014 08:01:58 GMT-0500 (EST)","timeDrift":-18000716,"event":"Opened info"},{"session":"e8a14c99-b18a-20a5-1d7e-cea199a1f605","time":1393246932466,"prettyTime":"Mon Feb 24 2014 08:02:12 GMT-0500 (EST)","timeDrift":-18000716,"event":"Closed info"}

Now, I want to parse it and store the records in database. How can it be parsed effectively and what would be a good way to store parameters?

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1 Answer 1

Reset to default
2

Just do using JSON::parse

require 'json'

JSON.parse(string)

Example :

require 'json'

string = '{"session":"a24186c2-5536-1734-42cc-3eb50e625964","time":1392862093110}'
JSON.parse(string)
# => {"session"=>"a24186c2-5536-1734-42cc-3eb50e625964", "time"=>1392862093110}

Update

as per your comment do as below :

require 'json'

string = '[{"session":"a24186c2-5536-1734-42cc-3eb50e625964","time":1392862093110},{"sessi‌​on":"a24186c2-5536-1734-42cc-3eb50e625964","time":1392862093110}]'

array = JSON.parse(string)
# => [{"session"=>"a24186c2-5536-1734-42cc-3eb50e625964",
#      "time"=>1392862093110},
#     {"sessi‌​on"=>"a24186c2-5536-1734-42cc-3eb50e625964",
#      "time"=>1392862093110}]

array.each do |a|
  # your code
  puts a
end

# >> {"session"=>"a24186c2-5536-1734-42cc-3eb50e625964", "time"=>1392862093110}
# >> {"sessi‌​on"=>"a24186c2-5536-1734-42cc-3eb50e625964", "time"=>1392862093110}
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4 Comments

But how should I split the data to separate individual json objects?
@Peeyush You have now Hash object from Json string. Now you can use Ruby's Hash API...
Let me try to clarify. Let's say data is {"session":"a24186c2-5536-1734-42cc-3eb50e625964","time":1392862093110},{"session":"a24186c2-5536-1734-42cc-3eb50e625964","time":1392862093110} How to separate the two parts in it?
Thanks for the help. This works! Now how should I access session value for a particular a. a[session] does not seem to work.

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