How could I render to a string a JSON representation of a JBuilder view?

后端未结

关注

 8  1458

I\'m using JBuilder as to return some JSON. I have a index.json.jbuilder that generates the data, and I need to render it to a string. However, I\'m not sure ho

相关标签:

8条回答

佛祖请我去吃肉

2020-12-29 05:51

If you're doing this in the controller, a much simpler option is to try to the move the code into the view being rendered by the controller.

I described this here: https://github.com/shakacode/react-webpack-rails-tutorial/blob/master/docs/jbuilder.md

basically you can call render in the view, and you're done. Like this:

<%= react_component('App', render(template: "/comments/index.json.jbuilder"),
    generator_function: true, prerender: true) %>

Here's the notes on what happens if you want to pass the data from the controller to the view:

class PagesController < ApplicationController
  def index
    @comments = Comment.all

    # NOTE: The below notes apply if you want to set the value of the props in the controller, as
    # compared to he view. However, it's more convenient to use Jbuilder from the view. See
    # app/views/pages/index.html.erb:20
    #
    #  <%= react_component('App', render(template: "/comments/index.json.jbuilder"),
    #     generator_function: true, prerender: true) %>
    #
    #
    # NOTE: this could be an alternate syntax if you wanted to pass comments as a variable to a partial
    # @comments_json_sting = render_to_string(partial: "/comments/comments.json.jbuilder",
    #                                         locals: { comments: Comment.all }, format: :json)
    # NOTE: @comments is used by the render_to_string call
    # @comments_json_string = render_to_string("/comments/index.json.jbuilder")
    # NOTE: It's CRITICAL to call respond_to after calling render_to_string, or else Rails will
    # not render the HTML version of the index page properly. (not a problem if you do this in the view)
    # respond_to do |format|
    #   format.html
    # end
  end
end

0 讨论(0)

一生所求

2020-12-29 05:52

You can also do it like this, which leaves your controller a bit cleaner.

# controller
def new
  @data = Data.all
end


# view
<% content_for :head do %>
  <script type="text/javascript">
    var mydata = <%= raw render :partial => 'path/to/partial', :locals => {data: @data} %>;
  </script>
<% end %>


# path/to/_partial.html.jbuilder
json.array!(@data) do |d|
  json.extract! field1, :field2, :field3, :field4
  json.url data_url(d, format: :json)
end


# layouts/application.html
<!DOCTYPE html>
<html>
<head>
  <%= yield :head %>
</head>
<body>
...
</body>
</html>

0 讨论(0)

上一页 1 2