NoMethodError Ruby 1.9.3

Question

I am using Ruby 1.9.3 and getting the following error on the following line while trying to use the SendGrid API.

ERROR [on this line below "mailer.mail(mail_defaults)"]:

 NoMethodError (undefined method `to_h' for #<Hash:0x00000005da0958>):

CODE:

assuming some users

      recipients = []

        recipient = SendGrid::Recipient.new('jn@geo.com')
        recipient.add_substitution('name', 'Billy Bob')
        recipient.add_substitution('number', 1234)
        recipient.add_substitution('time', '10:30pm')

        recipients << recipient



      # then initialize a template
      template = SendGrid::Template.new('blahblah7bef2-d25b00')

      # create the client
      # see client above

      # set some defaults
      mail_defaults = {
        :from => 'no-reply@geo.com',
        :html => '<h1>I like email tests</h1>',
        :text => 'I like email tests',
        :subject =>'Test Email is great',
      }

      mailer = SendGrid::TemplateMailer.new(client, template, recipients)

      # then mail the whole thing at once
      mailer.mail(mail_defaults)

I thought it might be my mail_defaults array so I tried this (see below) and received the same error on the same line.

mail_defaults = {
        from: 'no-reply@geo.com',
        html: '<h1>I like email tests</h1>',
        text: 'I like email tests',
        subject: 'Test Email is great',
      }

Do I have an error in my code or is their an error in SendGrids mailer.mail method?

Can you please show us the complete back trace? You might need to remove backtrace silencers in your `config/initializers/backtrace_silencers.rb`. — Matouš Borák, Mar 29 '16 at 05:53

score 0 · Answer 1 · answered May 11 '16 at 04:27

This problem is with mail.mailer. This uses the to_h method internally, which was implemented in Ruby 2.1. Effectively, the sendgrid sdk requires ruby 2.1 now. I had the same issue with Ruby 1.9.3 and solved it by upgrading to 2.1.

This is what I used to upgrade to Ruby 2.1 on CentOS 6 (not my gist): https://gist.github.com/mustafaturan/8290150

Hope this helps.

NoMethodError Ruby 1.9.3

assuming some users

1 Answers1