Multiple bindings for string

[J7mbo]

Hi, I expect this to be a simple problem to solve.

I have two structs, one Controller and one Dependency, and a factory for each struct. Each factory function takes a single string as a parameter. I'm trying to initialise the first struct with the second struct as a dependency, both of which require a string.

package main

type Controller struct {
	controllerString string
}
func NewController(controllerString string) Controller {
	return Controller{controllerString: controllerString}
}

type Dependency struct {
	dependencyString string
}
func NewDependency(dependencyString string) Dependency {
	return Dependency{dependencyString: dependencyString}
}

func main() {
	initialiseController("str1", "str2")
}

Here's my wire.go.

func initialiseController(dependencyString string, controllerString string) Controller {
	wire.Build(NewDependency, NewController)
	return Controller{}
}

I am new to this library and I don't know how wire is working under the hood. Wouldn't Wire see two strings, reflect on NewDependency, inject the first one, and then the second with NewController?

What do I need to do to achieve what I require?

[Hartimer]

Wire does not support multiple bindings of the same type, in this case string.

You'll have to create a type alias for at least one of those strings in order to disambiguate.

[vangent]

@Hartimer is correct. There is a FAQ about this as well:
https://github.com/google/wire/blob/master/docs/faq.md#what-if-my-dependency-graph-has-two-dependencies-of-the-same-type

Hope that helps!

[J7mbo]

Cheers guys!