passing array of objects from js to rails

问题

I am trying to pass an array of objects from js to rails

data.test = [{test: 'asdas'}]

$.ajax({
  url: 'evaluate.json',
  data: data,
  success: function(data){
  },
  dataType : "json"
});

Rails

def evaluate
   logger.info("#{params.test}")
end

Here the logger statement always gives me out put as

{"0"=>{"test"=>"asdas"}}

I am expecting the below log in rails.

 [{:test=>"asdas"}] 

回答1:

You should use JSON.stringify in Javascript, which takes either an array or hash as its argument (since these are the only valid JSON constructions). It returns a form which is the Javascript object serialized to JSON.

On the Ruby side, you'll receive a JSON encoded string, so you'll need to require 'json' (this is done automatically in Rails) and use JSON.parse(string). This will give you a Ruby object.

回答2:

Try this:

data.test = [{test: 'asdas'}]

$.ajax({
  url: 'evaluate.json',
  data: JSON.stringify(data),  // Explicit JSON serialization
  contentType: 'application/json',  // Overwrite the default content type: application/x-www-form-urlencoded
  success: function(data){
  },
  dataType : "json"
});

来源：https://stackoverflow.com/questions/38175383/passing-array-of-objects-from-js-to-rails