Dynamic Config Support

help
1

I'm using the config crate, which is great.

One of my config sections looks like this:

[strategy]
name = "mean-reversion"
symbols = ["SPY", "AAPL"]

I'd like to be able to support n strategies - something like:

[strategy-1]
name-1 = "mean-reversion"
symbols-1 = ["SPY", "AAPL"]

[strategy-2]
name-2 = "mean-reversion"
symbols-2 = ["SPY", "AAPL"]

I don't think the crate supports importing this into a data structure directly - I'd have to write custom code. Am I correct?

2

Are TOML tables the answer?

1 Like
3

I think arrays of tables are a better solution here:

[[strategy]]
name = "mean-reversion"
symbols = ["SPY", "AAPL"]

[[strategy]]
name = "angry-regression"
symbols = ["EYE", "MSFT"]
4 Likes
4

I'll find out if the crate supports this.

5

Worked like a charm!

[[strategies]]
name = "mean-reversion"
symbols = ["SPY", "AAPL"]

[[strategies]]
name = "pairs"
symbols = []

...

Config:
Ok(AppConfig { strategies: [Strategy { name: "mean-reversion", symbols: ["SPY", "AAPL"] }, Strategy { name: "pairs", symbols: [] }] })
6

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