elixir - 表单中的 date_select 失败， " is invalid"

Question

我有这个模板

<div class="form-group">
  <label>Insurance Expiry : </label>
  <%= date_select f, :insurance_expiry, class: "form-control" %>
</div>

和迁移有，

def change do
  create table(:buses) do

   # snipped

    add :insurance_expiry, :date, default: Ecto.Date.local

  end

在 db 模型中，

 schema "buses" do

 # snipped

   field :insurance_expiry, :date

 end

关于创建操作的调试信息，

[info] Processing by BusMan.BusController.create/2
  Parameters: %{"_csrf_token" => "PDkIZycHTRJsEzwOEBJRXxo6MVIFJgAAHla/FI4Y5PQxTYdk/XakNg==", "_utf8" => "✓", "bus" => %{"bus_no" => "138", "chassis_no" => "nTHSNTH", "engine_no" => "RCHR989", "insurance_expiry" => %{"day" => "1", "month" => "10", "year" => "2019"}, "models" => "NTHRCG898", "reg_no" => "TN21W0613", "year_of_registration" => "1990"}, "format" => "html"}

表单提交失败:

Oops, something went wrong! Please check the errors below:

    Insurance expiry is invalid

我只想输入一个日期，是 date_select是我需要的还是我缺少其他东西？

Answer 1

如 José Valim更正，使用 Ecto.Date而不是 :date正确解决了问题，并且不需要显式转换。

看起来传递给 create 函数的日期是一个映射。在插入之前，请尝试将其转换为日期
Ecto.Date.cast(%{"day" => "1", "month" => "10", "year" => "2019"})
我可以想象代码看起来像

selected_date = %{"day" => "1", "month" => "10", "year" => "2019"}
  |> Ecto.Date.cast
  |> Repo.insert!