How to pass variable to asset function in twig, Symfony 2

Question

How to pass variable to asset function in twig, Symfony 2 ?

The images are in directory:

C:\\Bitnami\\wampstack-5.5.30-0\\sym_prog\\proj3_27\\web\\bundles\\meeting\\images\\uploads .

Trying to upload images to webpage gives error:

Unexpected token "punctuation" of value ")" .

<img src="{{ asset( 'bundles/meeting/images/uploads/'~entity.path~ ) }}" />  {# does not work #} 

 {# working <img src="{{ asset('bundles/meeting/images/uploads/8211c4c586eb4460d3ed08edcc46972bb72dcbe0.png') }}" />  #}

Answer 1

解决的办法是追加''：

<img src="{{ asset( 'bundles/meeting/images/uploads/'~entity.path~'' ) }}" />