Rails 枚举“0”不是有效的收入类型

Question

我有一个 Ruby on Rails 应用程序来处理用户收入，决定它是津贴还是收入并应用适当的税率。我已经包含了一些enums执行基本功能的内容，如下所述。

当我从默认值开始更新时，我遇到了问题“1”不是有效的收入类型。

您可以在下面看到设置，包括模型、控制器和表单。

模型 ：

class Income < ApplicationRecord
  enum incomeType: {income: 0, allowance: 1 }
  enum taxed: {yes: 0, no: 1 }

  belongs_to :user
end

控制器：

class IncomesController < ApplicationController
  before_action :set_income, only: [:show, :edit, :update, :destroy]

  # GET /incomes
  # GET /incomes.json
  def index
    @incomes = current_user.incomes.all
  end

  # GET /incomes/1
  # GET /incomes/1.json
  def show
  end

  # GET /incomes/new
  def new
    @income = current_user.incomes.build
  end

  # GET /incomes/1/edit
  def edit
  end

  # POST /incomes
  # POST /incomes.json
  def create
    @income = current_user.incomes.new(income_params)

    respond_to do |format|
      if @income.save
        format.html { redirect_to @income, notice: 'Income was successfully created.' }
        format.json { render :show, status: :created, location: @income }
      else
        format.html { render :new }
        format.json { render json: @income.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /incomes/1
  # PATCH/PUT /incomes/1.json
  def update
    respond_to do |format|
      if @income.update(income_params)
        format.html { redirect_to @income, notice: 'Income was successfully updated.' }
        format.json { render :show, status: :ok, location: @income }
      else
        format.html { render :edit }
        format.json { render json: @income.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /incomes/1
  # DELETE /incomes/1.json
  def destroy
    @income.destroy
    respond_to do |format|
      format.html { redirect_to incomes_url, notice: 'Income was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_income
      @income = Income.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def income_params
      params.require(:income).permit(:amount, :frequency, :user_id, :incomeType, :country, :taxed)
    end
end

形式 ：

<%= form_with(model: income, local: true) do |form| %>
  <% if income.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(income.errors.count, "error") %> prohibited this income from being saved:</h2>

      <ul>
      <% income.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="field">
    <%= form.label :amount %>
    <%= form.text_field :amount, id: :income_amount %>
  </div>

  <div class="field">
    <%= form.label :frequency %>
    <%= form.select :frequency, options_for_select([['Weekly', '52'], ['Fortnightly', '26'], ['Monthly', '12'], ['Bi-Monthly', '6'], ['Annually', '1']]), id: :income_frequency %>
  </div>
  <div class="field">
    <%= form.label :incomeType %>
    <%= form.select :incomeType, options_for_select([['Income', '0'], ['Allowance', '1']]), id: :incomeType %>
  </div>
  <div class="field">
    <%= form.label :taxed %>
    <%= form.select :taxed, options_for_select([['Yes', '0'], ['No', '1']]), id: :taxed %>ra
  </div>

  <div class="actions">
    <%= form.submit %>
  </div>
<% end %>

希望你能指出我正确的方向。

{"utf8"=>"?",
 "_method"=>"patch",
 "authenticity_token"=>"HUTd5Bav9eAfWPTFFyqeD69aL4mIgZodIuL1+9eL0zIhN+SjDwAMcD7AzKEuhm6az4iALBSrDUXd/1vVfN77SQ==",
 "income"=>{"amount"=>"102000.0", "frequency"=>"1", "incomeType"=>"0", "taxed"=>"1"},
 "commit"=>"Update Income",
 "id"=>"4f9fc439-4578-487e-bc5d-02cf0cd9aaa3"}

在此先感谢您的帮助

Answer 1

是的，这是因为枚举需要键而不是值，并且您发送的是值而不是键，因此在您的情况下，枚举试图找到“0”作为一个不存在的键。所以只需稍微改变你的形式

<%= form.select :incomeType, options_for_select([['Income', 'income'], ['Allowance', 'allowance']]), id: :incomeType %>

PS：也要更改征税表格。希望这会有所帮助