Ruby on Rails应用中的致命错误

Question

Hi we had an app copied over to a new domain and are getting the following errors in the log. Can anyone point us in the right direction since we are no experts in Ruby on Rails?

F, [2018-04-17T07:01:04.366958 #32309] FATAL -- : [e1fdedc8-ccf2-4537-a2ca-2760fd71eb68]   
F, [2018-04-17T07:01:04.367095 #32309] FATAL -- : [e1fdedc8-ccf2-4537-a2ca-2760fd71eb68] ActionView::Template::Error (Missing host to link to! Please provide the :host parameter, set default_url_options[:host], or set :only_path to true):
F, [2018-04-17T07:01:04.367316 #32309] FATAL -- : [e1fdedc8-ccf2-4537-a2ca-2760fd71eb68]     87:                 </tr>
[e1fdedc8-ccf2-4537-a2ca-2760fd71eb68]     88:                 <tr style="font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;">  <td class="content-block" style="font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;" valign="top">
[e1fdedc8-ccf2-4537-a2ca-2760fd71eb68]     89:                     <p>
[e1fdedc8-ccf2-4537-a2ca-2760fd71eb68]     90:                       <a href="<%= lead_url(@lead, host: ENV['root_url'] ) %>"> <%= @lead.address %></p>
[e1fdedc8-ccf2-4537-a2ca-2760fd71eb68]     91:                   </td>
[e1fdedc8-ccf2-4537-a2ca-2760fd71eb68]     92:                 </tr>
[e1fdedc8-ccf2-4537-a2ca-2760fd71eb68]     93:                 <tr style="font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;"><td class="content-block" style="font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;" valign="top">
F, [2018-04-17T07:01:04.367370 #32309] FATAL -- : [e1fdedc8-ccf2-4537-a2ca-2760fd71eb68]   
F, [2018-04-17T07:01:04.367412 #32309] FATAL -- : [e1fdedc8-ccf2-4537-a2ca-2760fd71eb68] app/views/offer_mailer/lead_received_email.html.erb:90:in `_app_views_offer_mailer_lead_received_email_html_erb__2123924889929648841_69874930248760'
[e1fdedc8-ccf2-4537-a2ca-2760fd71eb68] app/mailers/offer_mailer.rb:6:in `lead_received_email'
[e1fdedc8-ccf2-4537-a2ca-2760fd71eb68] app/controllers/wizards_controller.rb:79:in `email_notify_agent'
[e1fdedc8-ccf2-4537-a2ca-2760fd71eb68] app/controllers/wizards_controller.rb:54:in `notify_agent'
[e1fdedc8-ccf2-4537-a2ca-2760fd71eb68] app/controllers/wizards_controller.rb:31:in `validate_step'

Answer 1

Try to the config/environment.rb file adding below line

Rails.application.routes.default_url_options = { :host => "https://example.herokuapp.com" } 
#=> host you can change your domain

you can use this separately in development.rb , production.rb and test.rb

production.rb

config.action_mailer.default_url_options = { :host => "https://example.herokuapp.com" }

make sure restart the server after making changes

Update

Now I think the issue raising for ENV['root_url'] , can you change this like below

<%= lead_url(@lead, host: 'https://your-domain.com' ) %> 

for test purpose and see what's happening, if it's working then you can set up the environment variable in the right way

For environment variable you can use Figaro gem, add Figaro to your Gemfile and bundle install:

gem "figaro"

Figaro installation is easy:

bundle exec figaro install
#=> create  config/application.yml

after installing this go to config/application.yml and add URL like this

root_url: "https://you-domain.com"

then now

<%= ENV['root_url'] %>
#=> https://you-domain.com