未定义函数cast附件/3

Question

对灵丹妙药和凤凰城来说很新鲜。尽我所能。

defmodule Countdown.Posts.Post do use Ecto.Schema import Ecto.Changeset schema "posts" do field :description, :string field :image, Countdown.PostUploader.Type field :shot, :naive_datetime field :title, :string timestamps() end @doc false def changeset(post, attrs) do post |> cast(attrs, [:title, :shot, :description, :image]) |> cast_attachments(params, [:image]) |> validate_required([:title, :shot, :description, :image]) end end

错误：

文件lib/倒计时/posts/post.ex == * (CompileError) lib/倒计时/posts/post.ex:19:未定义函数cast_ == /3 (stdlib) lists.erl:1338：:lists.foreach/2 (stdlib) erl_eval.erl:677：：erl_val.do_apply/6 (elixir) lib/核/并行_==.fn:198:匿名fn/4

Answer 1

据我所知，您正在使用埃多上传图像。

然后，您可能希望use Arc.Ecto.Schema包含cast_attachments宏：

 defmodule Countdown.Posts.Post do
   use Ecto.Schema
   use Arc.Ecto.Schema
   import Ecto.Changeset

    schema "posts" do
      field :description, :string
      field :image, Countdown.PostUploader.Type
      field :shot, :naive_datetime
      field :title, :string
      timestamps()
    end

    @doc false
    def changeset(post, attrs) do
      post
      |> cast(attrs, [:title, :shot, :description, :image])
      |> cast_attachments(params, [:image])
      |> validate_required([:title, :shot, :description, :image])
  end
end