Using Rails to Pass Front-End JavaScript Data from an External API to the Controller

I need to retrieve coordinates from an external API, specifically the Google Maps API, and then send it to my controller. However, I am encountering a 500 internal server error when using jQuery/Ajax for this task. Researching the issue online suggests that it could be due to a cross-domain Ajax request. Below are the relevant code snippets in JavaScript and the controller:

JavaScript:

// Here is where the Google Maps API code resides. The points variable represents an object with an array of coordinates.
var points = polyline.GetPointsAtDistance(16000);

$.ajax({
    type: "POST",
    url: '/pages/calculate',
    data: {mydata: points},
    success: function(response) {
        // Add your response handling logic here
    }
});

Controller:

def calculate
    x = params[:mydata]
    # Perform operations using 'x'...
end

Is there a way to successfully transmit this JavaScript data to the controller? Would submitting the data through a hidden form be a viable alternative? Alternatively, if backend manipulation of Google Maps data is required, should a Google Maps gem be used to handle all data processing on the backend instead?

Answer №1

One way to retrieve data from an external API is by setting up an ActiveResource. This will allow you to easily access and manipulate the data for use in your controllers and views.

To learn more about ActiveResource, visit: [http://api.rubyonrails.org/v3.2.1/classes/ActiveResource/Base.html]

Alternatively, you can utilize a pre-built Gem for this purpose...

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