Ex_machina创建时更改数据

Question

这是我的工厂：(using the ex_machina package)

def question_factory do
    %Question{
      active: true,
      type: "NBA",
      description: "player points",
      reserved: %{
        information: %{
          game_id: Ecto.UUID.generate,
          player_id: Ecto.UUID.generate,
          player_name: "Lebron James"
        },
        inputs: [
          %{
            type: "text",
            label: "Player Points",
          }
        ]
      }
    }
end

问题模式

schema "questions" do
  field(:active, :boolean)
  field(:type, :string)
  field(:description, :string)
  embeds_one(:reserved, Statcasters.Questions.Reserved)

  timestamps()
end

保留架构

embedded_schema do
  field(:information, :map)
  field(:inputs, {:array, :map})
end

这是我的测试设置：

question = insert(:question, reserved: %{ information: %{player_name: "steve"}})

在此示例中，我想only更新player_name映射的reserved。但是当我使用上述设置时，问题结构看起来像这样：

%MyApp.Question{
  __meta__: #Ecto.Schema.Metadata<:loaded, "questions">,
  active: true,
  description: "player points",
  id: 125,
  inserted_at: ~N[2018-08-27 14:47:42.075169],
  reserved: %MyApp.Questions.Reserved{
    information: %{player_name: "steve"},
    inputs: nil
  },
  type: "NBA",
  updated_at: ~N[2018-08-27 14:47:42.075182]
}

我希望它看起来像这样：

%MyApp.Question{
  __meta__: #Ecto.Schema.Metadata<:loaded, "questions">,
  active: false,
  description: "player points",
  id: 122,
  inserted_at: ~N[2018-08-27 14:39:52.672051],
  reserved: %MyApp.Questions.Reserved{
    information: %{
      game_id: "1ab95979-329a-488c-9d5f-22bed4f2b985",
      player_id: "07cc1588-68eb-43b6-afa6-483fa3005cb2",
      player_name: "Steve"
    },
    inputs: [%{label: "Player Points", type: "text"}]
  },
  type: "NBA",
  updated_at: ~N[2018-08-27 14:39:52.672058]
}

同样，问题在于它正在替换reserved中的所有值，我只想更改player_name，如何使用elixir和ex_machina来实现？感谢您的帮助。

Answer 1

您当前明确地告诉ex_machina按照指定设置reserved。当需要更新记录时，应ExMachina.build/2对其进行记录，更新并保存。或者，ExMachina.Ecto.insert/2支架，然后对其进行更新，但这不是ex_machina想要的。

也就是说，以下应该起作用。

:question
|> build()
|> put_in(~w|reserved information player_name|a, "steve")
|> insert()

有关详细信息，请参见Flexible Factories with Pipes。