How to query the ledger

[mattfortech]

Hello, please excuse my naivete, I am teaching myself blockchain from generous projects such as this one. Thank you so much for posting this, Ms. Chen. I have learned much from you.
I have deployed successfully and have created many commodities and POs (of course participants as well). My question is: how do I see the full history of a commodity? I have researched hyperledger in general and it seems there's a way to query through the API, but I don't see that defined in this API? Again, I apologize for being so new. Thank you for your time!