Question about views

[agorina]

I am not sure I fully understand the concept of views and combining them. Here is my use case:

I am creating a config using this code and yaml file:

config = LazyConfig('qti-scoring-engine', "app")

Here is an example of the config in the yaml:

uvicorn:
  host: 127.0.0.1
  port: 8080
  workers: 1

Then augmenting it with the arguments:

 config.set_args(args, dots=True)

the arguments I am passing are

parser.add_argument('--uvicorn.host', help='a host', required=False)
parser.add_argument('--uvicorn.port', help='a port', type=int, required=False)

When I then look up the configuration using the below line it returns only the entries from the second view created by the config.set_args:

config['uvicorn'].get()

How could I get all the values returned by merging both views?

When I examine the config in the debugger it has two views, and config.flatten() returns the properly merged configuration.

Any help is very much appreciated.

[sampsyo]

Good question! Views get combined when you ask for a specific point in the "key space." That is, when you ask for config['uvicorn']['host'].get(), it looks for the topmost match in the stack of values at uvicorn.host. But if you ask for config['uvicorn'], it again dutifully walks the stack of data sources and returns the first one that has a value for uvicorn—namely, the dict containing the overrides.

Would it work to use the individual values directly—i.e., to use config['uvicorn']['host'].get() and config['uvicorn']['port'].get(), etc., instead of trying to pull out a dict all at once? This way, you can also do validation on the individual values—for example, config['uvicorn']['port'].get(int).

[agorina]

Thank you for the quick response!

Unfortunately getting each setting individually is not going to work for what I am trying to achieve. I want to pass the whole set of options to uvicorn and logging_config.dictConfig. A work around I see for now is to call lazy_cfg.flatten() that seems to returned a fully merged map of configurations. My configuration is not large. Do you see any problems with this approach?

[sampsyo]

Nope, no problems at all! That (flatten) does seem like the right thing if you need to get the dict out at that point.

[agorina]

Thank you!