I want to add array type query parameter in kotlin...

# spring

[윤동환]

I want to add array type query parameter in kotlin spring boot mvc project using MockMvc.
To do this, i wrote code like this.

val productIds: List<Long>

mockMvc.get("/someUrl") {
    param("productIds", productIds.joinToString(","))
}

But, i don’t want to use joinToString and it looks ugly. Is there a nice any way to write code like this?

mockMvc.get("/someUrl") {
    params("productIds", productIds)
}

[Riccardo Lippolis]

assuming that productIds is an Array of Strings, I think it should work by using *productIds (spread operator, see docs), so like this:

mockMvc.get("/someUrl") {
    param("productIds", *productIds)
}

[윤동환]

productIds type is List<Long>. so do that, productIds.map { it.toString() }.toTypedArray() must be called…

[Riccardo Lippolis]

ah yeah, in that case joinToString is shorter 😅

[윤동환]

too sad open eye crying laughing

[kqr]

however is it the same in the end?

[kqr]

looks like it is as spring accepts comma delimited values too

[Jacob]

I recommend using joinToString if you want to test comma separated parameters.

Use params multiple times if you want to test ?productIds=42&productIds=49.

Both are valid forms of putting a list in query params, and you should be explicit about which form you're testing