After starting the rails server and vite dev server, when I try to access the rails application from browser I am getting this error:
#<NoMethodError: undefined method `then' for #<Array:0x00007fb072a3b2c0>>
/home/.rvm/gems/ruby-2.5.3/gems/rack-proxy-0.7.6/lib/rack/proxy.rb:27:in `extract_http_request_headers'
/home/.rvm/gems/ruby-2.5.3/gems/rack-proxy-0.7.6/lib/rack/proxy.rb:115:in `perform_request'
/home/.rvm/gems/ruby-2.5.3/gems/vite_ruby-3.2.14/lib/vite_ruby/dev_server_proxy.rb:20:in `perform_request'
/home/.rvm/gems/ruby-2.5.3/gems/rack-proxy-0.7.6/lib/rack/proxy.rb:87:in `call'```
The versions from my system are below:
ruby is 2.5.3
rails is 5.2.2
node is 14.21.2
npm is 6.14.17
yarn is 1.22.19
vite_ruby is 3.2.14
vite_rails is 3.0.14
The configurations from my system are below:
package.json -
`{
"devDependencies": {
"vite": "^4.1.3",
"vite-plugin-ruby": "^3.1.3"
},
"dependencies": {
"axios": "^1.2.2",
"react": "^18.2.0",
"react-dom": "^18.2.0"
}
}`
I tried downgrading the puma and vite and node versions but no luck.
I have posted the config file above as well.
even tried the host as 127.0.0.1 and 0.0.0.0.
The then method was introduced in Ruby 2.6. But you are using Ruby 2.5.3.
Which means the rack-proxy gem that raises the error is simply not compatible with your old Ruby version.
Ruby 2.5 reached end-of-life about 2 years ago. Therefore, I suggest updating to an up-to-date and still maintained Ruby version. Which means Ruby 3.0, because Ruby 2.7 will reach end-of-life in about 7 weeks, too.
But that will lead to another problem. You are still running Ruby on Rails 5.2 which is outdated for a while already. And Ruby on Rails 5.2 is not compatible with Ruby >= 2.7. That means you will need to update Ruby on Rails too.
Another option might be to try removing the dependency on the rack-proxy gem from your application or to downgrade rack-proxy to a version that was up-to-date when Ruby 2.5 was still maintained, like ~> 0.6.0.