Sending an array from JavaScript to Ruby using Sinatra

Question

Sending an array from JavaScript to Ruby using Sinatra

My goal is to transfer a 2D array from JavaScript to something that Ruby can interpret. All elements in the array are strings.

I have been using gon-sinatra, but it doesn't fulfill all my requirements. I tried storing the string I want to pass in 'gon.text' like this:

@temp = gon.text
array.push(@temp)

Unfortunately, this approach doesn't work because 'gon.text' appears as a nil object type instead of a string. When I try converting it using gon.text.to_s, it returns an empty string. As a result, when I attempt to display it, nothing shows up. For example,

alert("<%= @temp %>") // displays an empty string

.

I am unsure about the best course of action at this point. Would it be more effective to store the array in JSON format and then parse it in Ruby?

javascript ruby arrays sinatra

Answer 1

Answer №1

A possible solution is to first convert your array to a JSON string using Javascript:

var jsonData = JSON.stringify(yourArray);

After sending this string to your Ruby script, you can parse it back into an array using Ruby:

require 'json'

parsedArray = JSON.parse(receivedString)

Answer 2

A possible solution is to first convert your array to a JSON string using Javascript:

var jsonData = JSON.stringify(yourArray);

After sending this string to your Ruby script, you can parse it back into an array using Ruby:

require 'json'

parsedArray = JSON.parse(receivedString)

Answer 3

Answer №2

To implement this functionality in JavaScript, you would typically write code like the following:

var myArray = [ ['str1','str2'], ['str3','str4'] ];
$.get('/endpoint', { myArray: myArray })

If you are using Sinatra as your backend framework, the corresponding endpoint code could look something like this:

get 'endpoint' do
    myArrayStr = params[:myArray]
    error!('invalid array') unless myArrayStr
    @myArray = JSON.parse(myArrayStr)
    gon.rabl 'goners/yourFile.rabl', :instance => self

In your Gon file, you can then access the data with the following reference:

alert(gon.myArray[0][0]); // str1

Answer 4

To implement this functionality in JavaScript, you would typically write code like the following:

var myArray = [ ['str1','str2'], ['str3','str4'] ];
$.get('/endpoint', { myArray: myArray })

If you are using Sinatra as your backend framework, the corresponding endpoint code could look something like this:

get 'endpoint' do
    myArrayStr = params[:myArray]
    error!('invalid array') unless myArrayStr
    @myArray = JSON.parse(myArrayStr)
    gon.rabl 'goners/yourFile.rabl', :instance => self

In your Gon file, you can then access the data with the following reference:

alert(gon.myArray[0][0]); // str1

Sending an array from JavaScript to Ruby using Sinatra

Answer №1

Answer №2

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