Doing a mass purge of the cache using a wildcard

[Jordan Keith]

We are using nginx plus. We have caching configured for a few endpoints, one which is similar to the following: 

document/{id}/report 

I would like to purge all items cached under that endpoint, but executing a purge request like the following does not purge anything: 

document/*/report 

We have other endpoints where mass purges work fine, but they have the * at the end of the URL instead of the middle. 

So I have 2 questions: 

1). Does nginx only support wildcards at the end of the URL for cache-purging purposes? 
2). Is there some other way I can accomplish a mass purge here? 
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