$.AJAX for creating multiple records in rails - ruby-on-rails

Question

I'm using Ruby on Rails, and I have a button that can create a post through AJAX, using this:
$.ajax({
beforeSend: function(xhr) {
xhr.setRequestHeader(
'X-CSRF-Token',
$('meta[name="csrf-token"]').attr('content'))},
url: "/posts/",
type: "POST",
data: {
post: {
title: "Cheese",
content: "Cake",
}
}
});
How do I format the data to create multiple posts at once, for example
posts = [
{
title: "Cheese",
content: "Cake"
},
{
title: "Key Lime",
content: "Pie"
}
]
so I can insert multiple objects with one POST?
I have a list of titles and contents. Might I have to construct a JSON object out of these?
Regardless of whether this is good Rails practice, how do I do this? Also, where might I look for how to format such HTTP requests?

Answer 1

Your jQuery call won't change much:
$.ajax({
beforeSend: function(xhr) {
xhr.setRequestHeader(
'X-CSRF-Token',
$('meta[name="csrf-token"]').attr('content'))},
url: "/posts/",
type: "POST",
contentType: "application/json",
data: JSON.stringify({
posts: [
{
title: "Cheese",
content: "Cake",
},
{
title: "Key Lime",
content: "Pie"
}
]
})
});
In your Rails action, you will be able to access your posts as an array of hashes via params[:posts].
class ThingsController < ApplicationController
def batch_create
params[:posts].each do |post|
Post.create post
end
end
end
Explanation
Using JSON.stringify causes your data to be serialized as JSON. Set contentType to application/json to add the "Content-Type: 'application/json'" header to your POST. That will clue Rails to interpret your POST as JSON.