I have a button that links to a method, let's call it "method", inside the UserController that looks something like this:
def method
***do stuff***
@my_variable = value dependent on the do stuff part
end
Is there any way to access the variable in my javascript when it is done being computed (basically, when it's defined)?
in your erb file
<%= javascript_tag do %>
window.MyVariable = '<%= @my_variable %>';
<% end %>
railscast http://railscasts.com/episodes/324-passing-data-to-javascript?view=asciicast
window.MyVariable = <%= @my_variable.to_json %>;If you don't want to use window. solution, here's a different idea to try.
This is what I do in my show.html.erb to pass a reverse geocoded address to map the point in a js function that uses google map API.
<!-- Must be set to pass instance vars to javascript -->
<%= javascript_tag "var js_marker_lat = #{@location.latitude.to_json};" %>
<%= javascript_tag "var js_marker_lng = #{@location.longitude.to_json};" %>
In the javascript function, you use the vars as usual.
var latlng = new google.maps.LatLng(js_marker_lat, js_marker_lng);
In the controller, javascript_tag helper is not available, so you may be limited to to using the html.erb files for js vars stuff. Please let me know how it goes.
