如何在Phoenix框架中为必填字段添加自定义错误消息 [英] How to add a custom error message for a required field in Phoenix framework

问题描述

如何更改必填字段的错误消息?如果我有这样的东西

How can I change the error message for required fields? If I have something like that

@required_fields ~w(name email)

并且我想显示绝不为空"，而不是默认值不能为空"?

and I want to show "no way it's empty" instead of the default value of "can't be blank" ?

推荐答案

"can't be blank"错误消息目前已硬编码到Ecto中.但是，您可以通过执行以下操作来替换此错误消息:

The "can't be blank" error message is hardcoded into Ecto at the moment. However, you can replace this error message by doing:

def changeset(model, params \\ :empty) do
  model
  |> cast(params, @required_fields, @optional_fields)
  |> required_error_messages("no way it's empty")
end

def required_error_messages(changeset, new_error_message) do
  update_in changeset.errors, &Enum.map(&1, fn
    {key, "can't be blank"} -> {key, new_error_message}
    {_key, _error} = tuple  -> tuple
  end)
end

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