global_merge_vars doesn't work

[rubydev]

Hello,

my code looks like this:

class RemindersMailer < ActionMailer::Base
  def feedback_email
    mail(
      to: 'name@domain.com',
      body: '',
      subject: 'Your feedback is important to us!',
      template: 'your-feedback-is-important-to-us',
      global_merge_vars: [
          {
              'name' => 'FNAME',
              'content' => 'Jamie'
          },
          {
              'name' => 'CONSULTANT_NAME',
              'content' => 'Grace'
          }
      ]
    )
  end
end

RemindersMailer.feedback_email.deliver_now

But "global_merge_vars" are in header instead in message. So vars aren't replaced. Could you help me? Request looks like this:

    "template_name": "your-feedback-is-important-to-us",
    "template_content": null,
    "message": {
        "auto_html": null,
        "auto_text": null,
        "bcc_address": null,
        "from_email": "info@domain.com",
        "from_name": null,
        "global_merge_vars": null,
        "headers": {
            "Date": "Mon, 18 Dec 2017 17:32:32 +0100",
            "From": "info@domain.com",
            "To": [
                "name@domain.com"
            ],
            "Bcc": "info@domain.com",
            "Message-ID": "<5a37eda0553ad_bf7@XYZ-MacBook-Pro.local.mail>",
            "Subject": "Your feedback is important to us!",
            "Mime-Version": "1.0",
            "Content-Type": "text/plain",
            "Content-Transfer-Encoding": "7bit",
            "template": "your-feedback-is-important-to-us",
            "global-merge-vars": "{\"name\"=>\"FNAME\", \"content\"=>\"Jamie\"}, {\"name\"=>\"CONSULTANT_NAME\", \"content\"=>\"Grace\"}"
        },
        "html": null,
        "important": false,
        "inline_css": null,
        "merge": null,
        "merge_language": null,
        "merge_vars": null,
        "metadata": null,
        "preserve_recipients": null,
        "return_path_domain": null,
        "signing_domain": null,
        "subaccount": null,
        "subject": "Your feedback is important to us!",
        "tags": {},
        "text": "",
        "to": [
            {
                "email": "name@domain.com",
                "name": null,
                "type": "to"
            },
            {
                "email": "info@domain.com",
                "name": null,
                "type": "bcc"
            }
        ],
        "track_clicks": null,
        "track_opens": null,
        "tracking_domain": null,
        "url_strip_qs": null,
        "view_content_link": null
    },
    "async": false,
    "ip_pool": null,
    "send_at": null,
    "key": "xyz"
}

mandrill_dm 1.3.4
rails 5.1.4
mail 2.7.0
mandrill-api 1.0.53

Maybe I'm using it in wrong way? Could you help me?

[rubydev]

With gem mail version 2.6.4 it is working well, with 2.7.0 no.

[Tensho]

Yes, there is breaking change of the private API in mail 2.7.0. As far as mandrill_dm relies on private API for retrieving header value unmodified, it should be updated accordingly.

>> require 'mail'
true
>> Mail::VERSION.version
"2.7.0"
>> m = Mail.new
#<Mail::Message:70160019869900, Multipart: false, Headers: >
>> m[:global_merge_vars] = {
  'name' => 'FNAME',
  'content' => 'Jamie'
}
{
       "name" => "FNAME",
    "content" => "Jamie"
}
>> m[:global_merge_vars].instance_variable_get(:@value)
nil # Should be initial value according to mail 2.6.4
>> m[:global_merge_vars].instance_variable_get(:@unparsed_value)
{
       "name" => "FNAME",
    "content" => "Jamie"
}
>> m[:global_merge_vars].value
"{\"name\"=>\"FNAME\", \"content\"=>\"Jamie\"}" # Still returns encoded value

Compare #field method in version 2.7.0 and 2.6.4. You may notice that the raw value is no more assigned to @value. But mandrill_dm relies on it in the #get_value method.

[spovich]

@rubydev please try version 1.3.5. It should work with both mail 2.6.x and 2.7.x.