The prefixes for Ruby on Rails routes are not properly preprocessed in the .erb.js file

I'm currently working with Rails 4 and encountering an issue with the following file:

// apps/assets/javascripts/products.js.erb

var getColoursAndMaterialsData = function(onSuccess)
{
    var fd = formdata();

    $.post( '<%= data_products_path(:format => :json) %>', fd )
    .done(function(data)
    {
        onSuccess(data);
    });
};

When I include products.js.erb in a .html.erb file, I am faced with the error:

undefined method `data_products_path'

It seems like the routes prefix 'data_products_path' is not being pre-processed. I had assumed that by giving products.js the .erb extension, it would have prompted the pre-processor to handle it.

Interestingly, the exact same code works fine when placed within

<script type="text/javascript"></script>
tags in the .html.erb file. The relevant section of my routes.rb file has this structure:

resources :products do
    collection do     
        post 'data'
    end
end

Is there another step or configuration required for this to work correctly?

Answer №1

Adding the .erb extension may not be enough for it to work. Have you considered using a simple jQuery AJAX post request instead?

Include dataType: "json" in your code to ensure that you receive a JSON response, and specify the URL directly instead of using URL helpers.

More information on jQuery post method here

If you need further clarification, this link provides an answer to a similar question:

Using a Rails helper method within a javascript asset

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