symfony - How to check app.request.attributes.get('_route')==blog/slug variables -

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for eg if url is
http://localhost/project/blog can check current url routes 

 {% if app.request.attributes.get('_route') == 'blog' %} </p>this default page</p>     {%endif%}

but below url:
http://localhost/project/blog/2
not working 

{% if app.request.attributes.get('_route') == 'blog/2' %} </p>this blog page 2</p> {%endif%}

try app.request.requesturi: should return "project/blog/2"

{% if 'blog/2' in app.request.uri  %}     </p>this blog page 2</p> {% endif %}

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