我正在尝试使用Absinthe找出如何在查询中使用嵌套项的参数。
我试图完成的是:
{
users(order: ASC) {
id
email
clients(order: DESC) {
id
email
}
}
}
这是我的架构和类型:
query do
@desc "Get all users"
field :users, list_of(:user) do
arg :order, type: :sort_order, default_value: :asc
resolve &Resolvers.users/2
end
end
@desc "A user"
object :user do
field :id, :id
field :email, :string
field :clients, list_of(:user)
end
解析器:
def users(_, args, _) do
args
|> Enum.reduce(User, fn
{:order, order}, query ->
query |> order_by({^order, :email})
end)
|> Repo.all |> Repo.preload([:clients])
end
所以我的问题是我应该如何以及在何处为客户放置排序参数? 通过上面的例子我得到一个错误:
"message": "Unknown argument \"order\" on field \"clients\" of type \"User\"."
答案 0 :(得分:4)
将参数放在clients
字段下:
object :user do
field :id, :id
field :email, :string
field :clients, list_of(:user) do
arg :order, type: :sort_order, default_value: :asc
resolve &Resolvers.clients/2
end
end
然后写一个解析器来处理排序:
def clients(user, %{order: clients_order}, _) do
sorted_clients = user.clients # TODO sort those clients into the desired order
{:ok, sorted_clients}
end