Elixir中错误处理的最佳方法是什么

Smartechno

我正在使用简单的凤凰e剂应用程序。在这个应用程序中，我试图公开一个REST API来保存和检索数据。

就我而言，如果主键（电子邮件地址）重复，则我的应用程序将引发错误。我需要知道处理此错误的最佳方法。尝试捕获或任何其他更好的解决方案。

这是我的数据保存方法

def post(conn, %{"stooge" => stooge, "name" => name, "email" => email , "password" => password})do
    respond = Repo.insert!(%ApiDb.User{name: name, email: email, stooge: stooge, password: password})
    json conn, respond
  end

样本有效载荷

{
    "stooge": "moe",
    "name": "Joe",
    "email": "[email protected]",
    "password":"asdasd"
}

型号/user.ex

defmodule ApiDb.User do
  use ApiDb.Web, :model
  schema "users" do
    field :password, :string
    field :name, :string
    field :email, :string
    field :stooge, :string
    timestamps()
  end

   @doc """
  Builds a changeset based on the `struct` and `params`.
  """
  def changeset(struct, params \\ %{}) do
    struct
    |> cast(params, [:name, :email, :password, :stooge])
    |> validate_required([:name, :email, :password])
    |> validate_format(:email, ~r/@/)
  end
end

错误

我尝试了try-catch块，但是没有运气

try do
    respond = Repo.insert!(%ApiDb.User{name: name, email: email, stooge: stooge, password: password})
    json conn, respond
rescue 
  e in Ecto.ConstraintError -> IO.puts("An error occurred: ")
end

Smartechno

找到了很好的简单方法

 def post(conn, %{"stooge" => stooge, "name" => name, "email" => email , "password" => password})do
    try do
        respond = Repo.insert!(%ApiDb.User{name: name, email: email, stooge: stooge, password: password})
        json conn, respond
    rescue 
      e in Ecto.ConstraintError ->  json conn, (%{"status" => false, "message" => e.message})
    end
  end

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