Passing data from rails controller to react component

Question

I'm trying to integrate rails with react via webpacker, but i dont know how to pass in example @post = Post.all from controller to react component props. I have to do this by api or there is other way??

Answer 1

I find solution by my self. https://hackernoon.com/how-to-get-your-rails-data-into-your-react-component-with-webpacker-647dc63706c9

By adding content tag to view where I want to render react component and pass props as attributes.

<%= content_tag :div,
  id: "appointments_data",
  data: @appointments.to_json do %>
<% end %>

then parse data and add it do props

document.addEventListener('DOMContentLoaded', () => {
  const node = document.getElementById('appointments_data')
  const data = JSON.parse(node.getAttribute('data'))
  ReactDOM.render(
    <Appointments appointments={data} />,
    document.body.appendChild(document.createElement('div')),
  )
})

Answer 2

Here is another way:

some_views.html.erb

<%= javascript_tag do %>
  var appointments = <%= raw(@appointments.to_json) %>
<% end %>

some_react_components.js

document.addEventListener('DOMContentLoaded', () => {
  const data = window.appointments
  ReactDOM.render(
    <Appointments appointments={data} />,
    document.body.appendChild(document.createElement('div')),
  )
})