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String interpolation not working for Ruby heredoc constant


instead:

const = <<-EOT.constantize
  This::Is::ThePath::
  To::MyModule::#{a_variable}
EOT

use:

const = <<-EOT.gsub(/
/, '').constantize
  This::Is::ThePath::
  To::MyModule::#{a_variable}
EOT

This method that create string <<-EOF ... EOF put on the end of line, then constantize can't work properly. Removed undesired character , , s and all should work.

Look my test case:

conts = <<-EOF.constantize
=> ActionDispatch::Integration::Session
=> EOF

#> NameError: wrong constant name "Session
"

conts = <<-EOF.chomp.constantize
=> ActionDispatch::Integration::Session
=> EOF
#> ActionDispatch::Integration::Session

For many lines:

conts = <<-EOF
=> ActionDispatch::
=> Integration::
=> Session
=> EOF
=> "ActionDispatch::
Integration::
Session
"

Fix it:

conts = <<-EOF.gsub(/
/, '').constantize
=> ActionDispatch::
=> Integration::
=> Session
=> EOF
=> ActionDispatch::Integration::Session

Categories : Ruby On Rails

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