tickNewsEvent does not map tickerId

[Fredrik-C]

I have a loop to subscribe for streaming news for a set of tickers:

for ticker in tickers:
    contract = Stock(ticker, 'SMART', 'USD')
    ib.qualifyContracts(contract)
    ib.reqMktData(contract, f'mdoff,292:{codes}', False, False)
    
ib.sleep(5)
ib.tickNewsEvent += on_tick_news

The passed argument to the eventhandler on_tick_news is a NewsTick:

class NewsTick(NamedTuple):
    timeStamp: int
    providerCode: str
    articleId: str
    headline: str
    extraData: str

According to TWS Api documentation the is a tickerId:

This tickerId however seems to be "lost in translation".

In my use case it is essential to know which ticker the news is related to.

[mattsta]

Thanks for pointing that out!

I'll look into fixing the data structure and API there for the next update cycle.

The entire "news API" adapters are under-tested and under-used apparently since we keep finding edge cases and data mismatches.

[Fredrik-C]

I figured out that it is most likely the unused _reqid that is tickerid:

But that id is not what I was hoping for (was hoping it would be conid in the contract)

[Fredrik-C]

Hm... If I do a modification to also return the reqid when starting the subscription, then I can use a dictionary to map reqId => contract. I bit ugly, but solves my problem:

[mattsta]

also return the reqid when starting the subscription, then I can use a dictionary to map reqId => contract.

This is a reasonable approach. We can automate it at the API level (remembering the mapping internally) so it can populate a Ticker or Contract object on the news event results.