including an image path in a mixin?

[jannisg]

I'm trying to write a simple mixin that I can use to place an dropshadow image into, the mixin that isn't working is this:

@mixin dropshadow($img,$padding:30) {
    padding-bottom: $padding+px;
    background:{
        image: url(../images/+$img);
        position: center bottom;
        repeat: no-repeat;
    }
}

This doesn't work and I get this error

error scss/style.scss (Line 309: Invalid CSS after " image: url(": expected ")", was "../images/+$img);")

Any ideas on how I can do this?

[nex3]

According to the CSS spec, url() is another form of string quotes, so Sass treats it the same way (usually). In order to include a variable along with some other text, you need to use #{}, as in url(../images/#{$img}).

[jannisg]

works great, thanks!