render.transformer.resolve_value_fn
render.transformer.resolve_value_fn(value_fn)
Resolve the value function
This function is used to resolve the value function (value_fn
) to an object of type IT
. If the value function is asynchronous, it will be awaited. If the value function is synchronous, it will be called.
While always using an async method within an output transform function is not appropriate, this method may be safely used to avoid boilerplate.
Replace this:
if is_async_callable(_fn):
= await _fn()
x else:
= cast(ValueFnSync[IT], _fn)() x
With this:
= await resolve_value_fn(_fn) x
Parameters
value_fn:
ValueFn
[IT
]-
App-supplied output value function which returns type
IT
. This function can be synchronous or asynchronous.
Returns
Type | Description |
---|---|
IT |
The resolved value from value_fn . |