Tips for transferring data via ajax to rails 3. The jQuery function is ensuring the string is properly handled

I am attempting to achieve the following:

$.ajax({
   type: "PUT",
   url: /example,
   data: {_method: "put", "foo_model[bar_attribute]": value_var }
});

It is working as expected, but I need to dynamically construct the part foo_model[bar_attribute].

I have attempted the following approach:

var model = "foo_model";
var attribute = "foo_attribute";
var param = model + "[" + attribute + "]";
var dataStr = '{_method: "put",' + param + ': ' + value + '}';

And then again:

$.ajax({
   type: "PUT",
   url: /example,
   data: dataStr
});

However, it does not work as intended. jQuery seems to be escaping quotes and adding curly brackets everywhere...

Is there a better way to accomplish this? I have also tried other methods such as creating a JSON object, setting processData to false, as mentioned in another post, but nothing seems to be effective... The request always gets transformed and escaped. I also attempted to use unescape, but it only works when I explicitly write:

data: {_method: "put", "foo_model[bar_attribute]": value_var }

Thank you.

Answer №1

This is a simple solution that has been tested and proven to work:

var model = "foo_model";
var attribute = "foo_attribute";
var param = model + "[" + attribute + "]";
var value = "test";

$.ajax({
  url: "http://fiddle.jshell.net/pu6ME/show/",
  type: "GET",
  data: param + '=' + value
}).done(function() {
   alert("It's working!");
});

By using the param + '=' + value method, you can create dynamic names for your variables. Using this workaround allows for flexibility in naming conventions.

No need to define a separate datastring variable; simply use the concatenated parameters.

View this JSFiddle example (press Control/Cmd + I to view network activity and see it in action).

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