On Tuesday, 25 November 2014 03:58:01 UTC-5, Maneesh M P wrote:
>
>
> Hello,
>
> I am trying to fetch instances details from amazon and trying to store
> in local mysql db. I am able to fetch all the details from amazon, but
> while storing the data in mysql i am getting the error undefined method
> `stringify_keys' at two places [which ever gets executed first]
>
> Below is my code, can anyone please help me to resolve this error? [ I
> marked error in red]
>
> class Ec < ActiveRecord::Base
> attr_accessible :instance_id, :name, :public_ip_address,
> :availability_zone, :state, :created_at, :flavor_id, :account
> def sync
> properties = Array.new
> instance = Ec.new
> connection_dev = Fog::Compute.new({
> :provider => 'AWS',
> :aws_access_key_id => '#######',
> :aws_secret_access_key => ######'
> })
>
> dev_instances_list = connection_dev.servers.all
>
> dev_instances_list.each do | inst|
> begin
> instance[:instance_id] = inst.id
> instance[:name] = (inst.tags['Name'].to_s.empty?)? "NA" :
> inst.tags['Name']
> instance[:public_ip_address] = inst.public_ip_address
> instance[:availability_zone] = inst.availability_zone
> instance[:state] = inst.state
> instance[:created_at] = inst.created_at
> instance[:flavor_id] = inst.flavor_id
> instance[:account] = "abc"
> #instance.save
> properties.push(instance)
> rescue
> puts "exception"
> end
> end
> update_instance_details(properties)
> end
>
> def update_instance_details(properties)
> updated_list = Array.new
> to_store = Hash.new
> up = Ec.new
> Ec.find_each do |existing|
> to_store = properties.select{|a| a[:instance_id] ==
> existing.instance_id}
>
`properties` here is an Array. `select` is always going to return an Array,
even if one or no elements match.
if(to_store.nil?)
>
So this will never work - if the instance is entirely missing, `to_store`
will be `[]`.
> #someone has deleted this instance from amazon
> puts "Removing the record"
> existing.delete
> else
> #update existing record from amazon if there any changes
> * Ec.update(existing.id <http://existing.id>, to_store)
> //Errror line*
>
And then `update` is expecting a hash, not an Array - giving the error
you've noted.
You may want `find` instead of `select` when extracting an instance's
details from `properties`. This will return the *element* instead of an
Array.
Example:
a = [1,2,3,4]
a.select { |el| el == 3 } # => returns [3]
a.find { |el| el == 3 } # => returns 3
For both cases, I'd recommend investigating exactly what class the values
in `dev_instances_list` are.
--Matt Jones
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