Symfony2和Assetic - cssrewrite非常适合dev，而不适用于prod

I include my CSS with the following code:

{% stylesheets 'bundles/majorproductionssewingdivasite/css/*.css' filter='cssrewrite' %}
    <link rel="stylesheet" type="text/css" href="{{ asset_url }}" />
{% endstylesheets %}

In dev, this allows me to use image sprites without any problems. The resulting URL to my sprite is:

http://localhost/diva/web/bundles/majorproductionssewingdivasite/images/diva-sprites.jpg

But, in prod, it gets mapped to:

http://localhost/diva/bundles/majorproductionssewingdivasite/images/diva-sprites.jpg

Notice the lack of web directory.

The generated code in the CSS file is as it should be, and all my CSS (both the dev 'chunks' and the finalized prod assetic dump) are at web/css/. Any ideas as to why the prod environment is skipping the web directory?

EDIT: what's weird is that both dev and prod generate the same URL in the CSS itself:

url('../../bundles/majorproductionssewingdivasite/images/diva-sprites.jpg')

Solution is to dump the assets in the prod environment:

$ app/console assetic:dump --env=prod

In debug mode, Assetic 1.1 also seems to rewrite CSS even when it's not in the {% stylesheets %} tag. So it's worth checking that's there when you turn off debug in production.

Remember to Clear the Cache

php app/console cache:clear --env=prod --no-debug

berore

php app/console assetic:dump --env=prod --no-debug

Also remember to appropriate configure assetic, in your config_prod.yml set as below:

assetic:
    use_controller: false

Edit: As said in Symfony docs (actually in chapter refers to dev environment): tell Symfony to stop trying to process these files dynamically