Elixir 菲尼克斯外星变量模型法

我正在使用Phoenix web framework（Elixir）重写一个基于python的API交付服务，但遇到了一个小问题

我正在尝试创建一个基本的模型方法，当调用该方法时，您向它传递一个序列号，它通过Ecto查询数据库并返回结果。通过查看文档，我应该能够使用插值来定义查询中的变量，但是我仍然得到一个错误

lib/test\u result.ex文件

defmodule Webservices.TestResult do
  use Ecto.Schema

      schema "test_result" do
            field :date_added, Ecto.DateTime
            field :serial, :string
            field :sequence_id, :integer
            field :last_completed_stage, :integer
            field :last_completed_sequence, :integer
            field :workorder, :string
            field :product, :string
            field :is_complete, :integer
            field :is_scrapped, :integer
            field :value_stream, :string
            field :promise_date, Ecto.Date
            field :fail_lock, :integer
            field :sequence_rev, :integer
            field :date_updated, Ecto.DateTime
            field :date, Ecto.Date
            field :time, Ecto.Time
            field :ptyp2, :string
            field :wo_qty, :integer
            field :is_active, :integer
            field :is_time_lock, :integer
            field :time_lock_timestamp, Ecto.DateTime
            field :scrap_reason, :string
            field :scrapped_by, :integer
      end
  end

defmodule Webservices.TestResultDetail do
  use Ecto.Schema, :model
  import Ecto.Query

  schema "test_result_detail" do
    field :status_id, :integer
    field :station_id, :integer
    field :stage_id, :integer
    field :operator_id, :integer
    field :failstep, :string
    field :shift, :integer
    field :sequence_rev, :integer
    field :date_added, Ecto.Date
    field :date_timestamp, Ecto.DateTime
    field :date_time, Ecto.Time
    field :stage_order, :integer
    field :serial_number, :string
    field :is_retest, :integer
    field :retest_reason, :string

    has_many :result_id, Webservices.TestResult
end


  def last_completed_test(serial) do
    from c in Webservices.TestResultDetail,
      join: t in TestResult, on: t.id == c.result_id,
      select: {t.serial, c.station_id, c.stage_id, c.operator_id, c.sequence_rev},
      where: t.serial == ^serial,
      order_by: [desc: c.id],
      limit: 1
  end

end

lib/test\u result\u detail.ex文件

defmodule Webservices.TestResult do
  use Ecto.Schema

      schema "test_result" do
            field :date_added, Ecto.DateTime
            field :serial, :string
            field :sequence_id, :integer
            field :last_completed_stage, :integer
            field :last_completed_sequence, :integer
            field :workorder, :string
            field :product, :string
            field :is_complete, :integer
            field :is_scrapped, :integer
            field :value_stream, :string
            field :promise_date, Ecto.Date
            field :fail_lock, :integer
            field :sequence_rev, :integer
            field :date_updated, Ecto.DateTime
            field :date, Ecto.Date
            field :time, Ecto.Time
            field :ptyp2, :string
            field :wo_qty, :integer
            field :is_active, :integer
            field :is_time_lock, :integer
            field :time_lock_timestamp, Ecto.DateTime
            field :scrap_reason, :string
            field :scrapped_by, :integer
      end
  end

defmodule Webservices.TestResultDetail do
  use Ecto.Schema, :model
  import Ecto.Query

  schema "test_result_detail" do
    field :status_id, :integer
    field :station_id, :integer
    field :stage_id, :integer
    field :operator_id, :integer
    field :failstep, :string
    field :shift, :integer
    field :sequence_rev, :integer
    field :date_added, Ecto.Date
    field :date_timestamp, Ecto.DateTime
    field :date_time, Ecto.Time
    field :stage_order, :integer
    field :serial_number, :string
    field :is_retest, :integer
    field :retest_reason, :string

    has_many :result_id, Webservices.TestResult
end


  def last_completed_test(serial) do
    from c in Webservices.TestResultDetail,
      join: t in TestResult, on: t.id == c.result_id,
      select: {t.serial, c.station_id, c.stage_id, c.operator_id, c.sequence_rev},
      where: t.serial == ^serial,
      order_by: [desc: c.id],
      limit: 1
  end

end

我的控制器：

defmodule Webservices.OPTController do
    use Webservices.Web, :controller

    alias Webservices.Router
    import Webservices.Router.Helpers

    def last(conn, %{"serial" => serial}) do
        import Ecto.Query

        results = Webservices.TestResultDetail.last_completed_test(serial)
        render(conn, "last.json", results: results)

    end
end

我收到以下编译错误：

==文件web/controllers/opt_controller.ex上的编译错误== **（exto.Query.CompileError）变量

serial

不是有效的查询表达式。变量需要在查询中显式插入 与^ 扩展宏：exto.Query.where/3 web/controllers/opt_controller.ex:12:Webservices.OPTController.index/2 （elixir）扩展宏：内核。|>/2 web/controllers/opt_controller.ex:13:Webservices.OPTController.index/2 （elixir）lib/kernel/parallel_compiler.ex:117:kernel.parallelciler.spawn_compilers/1中的匿名fn/4

---

您合并了两个表，在

t

表中有

：serial

字段。在

c

中有

：序列号

。只需在

t.serial==^serial

where:c.serial==^serial

->

where:c.serial\u number==^serial

而不是

t

。我创建了一个answer.c.serial是指向另一个表的FK链接，其中有一个serial字段。测试结果详细信息表中未使用序列号字段，抱歉造成混淆。我在上面更新了我的问题，这是一个明确的胖手指很好的捕捉。我已经更新了，但仍然看到相同的错误。呃，这实际上是我在另一个文件中遇到的另一个打字错误的问题。