FAQ

How do I override, or provide a default value for a dependency?

you can use `dg.node` to create a factory to override the value. you can also have dependencies in your factory, and they will be resolved recursively.

class Config:
    def __init__(self, env: str = "prod"):
        self.env = env

@dg.node
def config_factory() -> Config:
    return Config(env="test")

How do i override a dependent in test?

you can use `dg.node` with a factory method to override the dependent resolution.

class Cache: ...

class RedisCache(Cache):
    ...

class MemoryCache(Cache):
    ...

@dg.node
def cache_factory(...) -> Cache:
    return RedisCache() 

in your conftest.py:

@dg.node
def memory_cache_factory(...) -> Cache:
    return MemoryCache()

as this follows LSP, it works both with ididi and type checker.

How do I make ididi reuse a dependencies across different dependent?

by default, ididi will reuse the dependencies across different dependent, you can change this behavior by setting `reuse=False` in `dg.node`.

@dg.node(reuse=False) # True by default
class AuthService: ...