CODEWITHSUNDEEP
ruby-on-railsrubyruby-on-rails-3ruby-on-rails-4
John Smith
John Smith

Reputation: 6259

Interpolating and pass Argument

I want to interpolate my Javascript Code with a Ruby Function. For example:

def find_house name
   ......
end

def map_houses
 %{
    function() {
       var name = this.name;
       var house_data = #{find_house(this.name)};
       ............
     }
  }
end

But, it doesn't work like this, i get an error for this line:

 var house_data = #{find_house(this.name)};

It says this.name is Undefinded.

How can I pass a javascript argument to this function? Thanks

Upvotes: 0

Views: 684

Answers (1)

Sean Hill
Sean Hill

Reputation: 15056

If I understand correctly, you want to interpolate the value of find_house into javascript, which will be executed elsewhere. It looks pretty close, but you do need to make a couple of changes.

def map_houses
 %Q{
    function() {
       var name = this.name;
       var house_data = "#{find_house(this.name)}";
       ............
     }
  }
end

%Q allows you to interpolate into a multi-line string, whereas %q does not. It's kind of like the difference between '' and "". The other change is that you will still want to wrap the interpolated value in "" so that the resulting javascript is properly wrapped in a string, assuming that var house_data is a string. If it's supposed to be a JSON object, then you'll want to remove the quotes and ensure that you're calling to_json on whatever value is interpolated there.

Edit

You can probably just drop the quotes wrapping the interpolation and call to_json on any value, and it will interpolate correctly. "some string".to_json #=> "\"some string\"", which interpolates to "some string", for example.

Upvotes: 1

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