为什么create_order / 2在我的测试中不匹配？

Question

我正在尝试在Phoenix中运行以下测试：

别名BarronWatchCompany.MWS别名BarronWatchCompany.Accounts

@valid_attrs %{amazon_order_id: "some amazon_order_id", buyer_email: "some buyer_email", buyer_name: "some buyer_name", earliest_delivery_date: "some earliest_delivery_date", last_update_date: "some last_update_date", latest_delivery_date: "some latest_delivery_date", order_status: "some order_status", order_total: "some order_total", purchase_date: "some purchase_date"}
@user_attrs %{encrypted_password: "some encrypted_password", username: "some username", mws_token: "some mwstoken"}

test "list_orders/0 returns all orders" do
  user = Accounts.create_user(@user_attrs)
  order = MWS.create_order(@valid_attrs, user)

  assert MWS.list_orders() == []
end

但是，我收到此错误：

  * test orders list_orders/0 returns all orders (369.7ms)

  1) test orders list_orders/0 returns all orders (BarronWatchCompany.MWSTest)
     test/barron_watch_company/mws/mws_test.exs:65
     ** (FunctionClauseError) no function clause matching in BarronWatchCompany.MWS.create_order/2

     The following arguments were given to BarronWatchCompany.MWS.create_order/2:

         # 1
         %{amazon_order_id: "some amazon_order_id", buyer_email: "some buyer_email", buyer_name: "some buyer_name", earliest_delivery_date: "some earliest_delivery_date", last_update_date: "some last_update_date", latest_delivery_date: "some latest_delivery_date", order_status: "some order_status", order_total: "some order_total", purchase_date: "some purchase_date"}

         # 2
         {:ok, %BarronWatchCompany.Accounts.User{__meta__: #Ecto.Schema.Metadata<:loaded, "users">, encrypted_password: "$2b$12$rJCbdwGS7uIAcHuMrnk/K.jij1bUfWNrx65sTtO4aqXYAMyGVLmIG", id: 44, inserted_at: ~N[2019-10-14 18:20:58], mws_token: "some mwstoken", orders: #Ecto.Association.NotLoaded<association :orders is not loaded>, updated_at: ~N[2019-10-14 18:20:58], username: "some username"}}

     Attempted function clauses (showing 1 out of 1):

         def create_order(attrs, %BarronWatchCompany.Accounts.User{} = user)

     code: order = MWS.create_order(@valid_attrs, user)
     stacktrace:
       (barron_watch_company) lib/barron_watch_company/mws/mws.ex:54: BarronWatchCompany.MWS.create_order/2
       test/barron_watch_company/mws/mws_test.exs:67: (test)

在此处定义create_user / 1和create_order的位置：

# BarronWatchCompany.MWS
def create_order(attrs \\ %{}, %User{} = user) do
  %Order{}
  |> Order.changeset(attrs)
  |> Ecto.Changeset.put_change(:user_id, user.id)
  |> Repo.insert()
end

# BarronWatchCompany.Accounts
def create_user(attrs \\ %{}) do
  %User{}
  |> User.changeset(attrs)
  |> Repo.insert()
end

知道为什么create_order/2不匹配吗？

Answer 1

您的错误是告诉您正在传递给create_order/2函数的第二个参数是{:ok, %User{...}}。您的功能只是期望顺序，而不是元组。如果您将用户提取出来并正确传递，则您的呼叫应该可以进行。