Route with optional parameter is not working in Symfony 2

问题

I am experiencing some issues with optional parameters in my routes. I think I did it properly according to the documentation but still it is not working.

So I have the following route defined:

test_wizard:
    pattern:  /test/wizard/{testName}/{step}/
    defaults: { _controller: TestBundle:Wizard:wizard, step: 1 }

and would like the route to be able to be called by /test/wizard/someTestName and then fill in the step parameter with the default value of 1 but everytime I call the route just with the test name I get the following instead:

No route found for "GET /test/wizard/someTestName" 

When I call the route by /test/wizard/someTestName/1/ itworks just fine. Why is my defined default value for step not working? Any suggestions? Thanks.

回答1:

It is not possible to make a parameter optional if you have a character after it (/ in your case). You have to define two routes:

test_wizard:
    pattern:  /test/wizard/{testName}
    defaults: { _controller: TestBundle:Wizard:wizard }

test_wizard_optional:
    pattern:  /test/wizard/{testName}/{step}/
    defaults: { _controller: TestBundle:Wizard:wizard, step: 1 }

来源：https://stackoverflow.com/questions/21078154/route-with-optional-parameter-is-not-working-in-symfony-2