Integrating external JavaScript files with ajax in Ruby on Rails

Question

Integrating external JavaScript files with ajax in Ruby on Rails

After creating a Rails module that generates JavaScript for a Google map, I encountered an issue. Whenever the user modifies the webpage, the observe_field function is used to send a callback to the server in order to update the map's JavaScript without refreshing the entire page. However, I am struggling to find a suitable method for inserting this new JavaScript into the page.

<div id='my_div_1'>div1</div>
<%= 
  update_page_tag do |page|
    page.replace_html 'my_div_1', "<script>alert('hi');</script>"
  end
%>

It appears that using replace_html only functions properly with non-script HTML content. When attempting to include the closing </script> tag, it encounters errors.

The following link leads to a page that may provide insights on this issue:

javascript ruby-on-rails ruby ajax prototypejs

Answer 1

Answer №1

One approach I experimented with that showed some promise was implementing an observe_field on the page and using prototype's Ajax.Updater to fetch the necessary JavaScript for the map functionality. The success rate of this method is around 95%, although there is a lingering doubt about its reliability in the remaining 5%. Upon downloading and running the JavaScript, a global init_map function is invoked, which was included in the downloaded content.

<% observe_field(:id_of_field_to_watch, 
:function => "
new Ajax.Updater('map_id', '/filter/map',   
{ 
    evalscripts: true,
    onComplete: function() { init_map() }
}); 
")
%>

Answer 2

One approach I experimented with that showed some promise was implementing an observe_field on the page and using prototype's Ajax.Updater to fetch the necessary JavaScript for the map functionality. The success rate of this method is around 95%, although there is a lingering doubt about its reliability in the remaining 5%. Upon downloading and running the JavaScript, a global init_map function is invoked, which was included in the downloaded content.

<% observe_field(:id_of_field_to_watch, 
:function => "
new Ajax.Updater('map_id', '/filter/map',   
{ 
    evalscripts: true,
    onComplete: function() { init_map() }
}); 
")
%>

Answer 3

Answer №2

Instead of relying on dynamic javascript, I decided to switch things up and use a json data structure to power the map. Now, whenever the map markers are updated, I simply download the necessary json data using Rails replace_html method and seamlessly integrate them into the map.

Answer 4

Instead of relying on dynamic javascript, I decided to switch things up and use a json data structure to power the map. Now, whenever the map markers are updated, I simply download the necessary json data using Rails replace_html method and seamlessly integrate them into the map.

Integrating external JavaScript files with ajax in Ruby on Rails

Answer №1

Answer №2

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