Ajax response in erb from ruby method defined in controller

Question

I have a ruby controller file with various methods defined, i want to get response of one of the method in erb i.e frontend using ajax call.

I am a beginner in ruby, so doesn't have much experience of handling requests in ruby, when i try to run the below code it gives error 404 in console stating url not found.

I have added relevant code snippets instead of entire code.


=> appcontroller.rb file


def returnimage_url
  image_url = "http://dfdabfyag.jpg"  //random url
  { :success => true, :img_value => image_url }.to_json
end

=> loadimage.erb file

<script>
function showImage(){
    $.ajax({
            url: '/returnimage_url',
            method: 'GET',
            dataType: "json",
            success: function(response){
                let image_data = JSON.parse(response);
                console.log(image_data);
            }
    });
}

showImage();
</script>

score 0 · Answer 1 · answered Jul 10 '20 at 12:26

You need to map the path /returnimage_url to your appcontroller.rb file and the specific method.

That should be done in your config/routes.rb file using something like this:

get 'returnimage_url', to: 'app#returnimage_url'

That will work if you rename your appcontroller.rb to app_controller.rb

See routing documentation for more info.

There are more issues in your code, but this should point you in the right direction and resolve the 404.

Ajax response in erb from ruby method defined in controller

1 Answers1