How to re-construct ActiveRecord from yaml

rubyonrails-talk
1

My controller rm_grants_controller.rb snip: class RmGrantsController < ApplicationController   def dump     File.open('db/backup/rm_grants.yaml', 'w') { |f| f.puts RmGrants.find(:all).to_yaml }   end end

This creates 'db/backup/rm_grants.yaml' whose content look like

2

My controller rm_grants_controller.rb snip: class RmGrantsController < ApplicationController def dump    File.open('db/backup/rm_grants.yaml', 'w') { |f| f.puts RmGrants.find(:all).to_yaml } end end

This creates 'db/backup/rm_grants.yaml' whose content look like --- - !ruby/object:RmGrant attributes:    key1: value1    key2: value2    key3: value3 attributes_cache: {}

- !ruby/object:RmGrant attributes:    key1: value1    key2: value2    key3: value3 attributes_cache: {}

I'm guessing that this code has been slightly edited from what's
actually in your app. Please be careful when you do this as errors
produced (or omitted) in the process (the code above contains several
typos and so) can make things very confusing.

I'm guessing you just want to dump the object attributes (ie the
database attributes). An active record object contains some other
instance variables that track a bunch of stuff, so you're not dumping
quite what you want, so you probably want something like

RmGrant.find(:all).collect {|record| record.attributes}.to_yaml

Now, I want to reconstruct ActiveRecord from the yaml file, so in rm_grants_controllers.rb def load records = YAML.load_file('db/backup/rm_grants.yml') records.each do |record|    @rm_grant = RmGrant.new(params[record])    @rm_grants.save! end end

I'm not entirely sure what you were thinking here. Why are you using
params at all? This should just be @rm_grant = RmGrant.new(record) (assuming you've
made the change I suggested above)

Fred