Created
October 16, 2012 20:30
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Removing attribute surprises
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| chef > Chef::VERSION | |
| => "10.14.2" | |
| ### Hidden state | |
| chef > i = node[:network][:interfaces] ; nil | |
| => nil | |
| chef > i.en0.to_hash | |
| => {"addresses"=>{"20:c9:d0:45:45:63"=>{"family"=>"lladdr"}, "fe80::22c9:d0ff:fe45:4563"=>{"family"=>"inet6", "prefixlen"=>"64", "scope"=>"Link"}, "172.28.8.77"=>{"family"=>"inet", "netmask"=>"255.255.255.0", "broadcast"=>"172.28.8.255"}}, "mtu"=>"1500", "flags"=>["UP", "BROADCAST", "SMART", "RUNNING", "SIMPLEX", "MULTICAST"], "type"=>"en", "number"=>"0", "encapsulation"=>"Ethernet", "arp"=>{"169.254.255.255"=>"0:22:d:11:4b:48", "172.28.8.1"=>"0:22:d:11:4b:48", "172.28.8.255"=>"ff:ff:ff:ff:ff:ff"}} | |
| chef > i.en0.to_hash | |
| ArgumentError: Attribute en0 is not defined! | |
| from /Users/ddeleo/.rbcompile/apps/chef/chef-10.14.2/lib/chef/node/attribute.rb:428:in `method_missing' | |
| from (irb):31 | |
| from /Users/ddeleo/.rbcompile/apps/chef/chef-10.14.2/lib/chef/shef.rb:73:in `block in start' | |
| from /Users/ddeleo/.rbcompile/apps/chef/chef-10.14.2/lib/chef/shef.rb:72:in `catch' | |
| from /Users/ddeleo/.rbcompile/apps/chef/chef-10.14.2/lib/chef/shef.rb:72:in `start' | |
| from /Users/ddeleo/.rbcompile/apps/chef/chef-10.14.2/bin/shef:34:in `<top (required)>' | |
| from /Users/ddeleo/.rbcompile/bin/shef:46:in `load' | |
| from /Users/ddeleo/.rbcompile/bin/shef:46:in `<main>' | |
| ### Implicit Attribute setting: | |
| chef > node.some_attribute?(:foo) | |
| => :foo | |
| chef > node[:some_attribute?] | |
| => :foo |
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| chef > Chef::VERSION | |
| => "11.0.0.alpha" | |
| ### No more hidden state: | |
| chef > i = node[:network][:interfaces] ; nil | |
| => nil | |
| chef > i.en0 | |
| => {"addresses"=>{"20:c9:d0:45:45:63"=>{"family"=>"lladdr"}, "fe80::22c9:d0ff:fe45:4563"=>{"family"=>"inet6", "prefixlen"=>"64", "scope"=>"Link"}, "172.28.8.77"=>{"family"=>"inet", "netmask"=>"255.255.255.0", "broadcast"=>"172.28.8.255"}}, "mtu"=>"1500", "flags"=>["UP", "BROADCAST", "SMART", "RUNNING", "SIMPLEX", "MULTICAST"], "type"=>"en", "number"=>"0", "encapsulation"=>"Ethernet", "arp"=>{"169.254.255.255"=>"0:22:d:11:4b:48", "172.28.8.1"=>"0:22:d:11:4b:48", "172.28.8.255"=>"ff:ff:ff:ff:ff:ff"}} | |
| chef > i.en0 | |
| => {"addresses"=>{"20:c9:d0:45:45:63"=>{"family"=>"lladdr"}, "fe80::22c9:d0ff:fe45:4563"=>{"family"=>"inet6", "prefixlen"=>"64", "scope"=>"Link"}, "172.28.8.77"=>{"family"=>"inet", "netmask"=>"255.255.255.0", "broadcast"=>"172.28.8.255"}}, "mtu"=>"1500", "flags"=>["UP", "BROADCAST", "SMART", "RUNNING", "SIMPLEX", "MULTICAST"], "type"=>"en", "number"=>"0", "encapsulation"=>"Ethernet", "arp"=>{"169.254.255.255"=>"0:22:d:11:4b:48", "172.28.8.1"=>"0:22:d:11:4b:48", "172.28.8.255"=>"ff:ff:ff:ff:ff:ff"}} | |
| ### No surprise attribute creation: | |
| chef > node.some_attribute?(:foo) | |
| NoMethodError: Undefined node attribute or method `some_attribute?' on `node' |
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