红宝石版本:2.0Rails的形式助手不读问号为对象属性
的Rails版本:4.0
我有一个控制器Question
,其具有用于一个模型Answer
嵌入形式。
question.rb
class Question < ActiveRecord::Base
has_many :answers, :dependent => :destroy
accepts_nested_attributes_for :answers, :allow_destroy => true
end
answer.rb
class Answer < ActiveRecord::Base
belongs_to :question
end
答案迁移
class CreateAnswers < ActiveRecord::Migration
def change
create_table :answers do |t|
t.string :text
t.integer :question_id
t.boolean :correct?
t.timestamps
end
end
end
在形式中,当编辑或创建新问题 - 用户最多可以输入4个可能的答案,并标记“正确”答案的复选框。
/views/questions/_form.html.erb
<%= form_for(@question) do |f| %>
<div class="field">
<%= f.label :text %><br>
<%= f.text_area :text %>
</div>
<p>Enter up to 4 posisble answer choices.</p>
<%= f.fields_for :answers do |answer| %>
<div class="field">
<%= answer.text_field :text %>
<%= answer.check_box :correct? %>
</div>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
从questions_controller.rb
def new
@question = Question.new
4.times { @question.answers.build }
end
private
# Use callbacks to share common setup or constraints between actions.
def set_question
@question = Question.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def question_params
params.require(:question).permit(:text, :quiz_id, answers_attributes: [:id, :text, :correct?])
end
最后相关片段 - 在我的问题
上面列出的所有东西都很完美直到我添加了复选框answer.correct?
。当我提交的形式是我在日志中得到这个消息:
Unpermitted parameters: correct
Unpermitted parameters: correct
Unpermitted parameters: correct
Unpermitted parameters: correct
怪异......肯定是在该参数的结尾问号。允许这个通过没有问号是编辑控制器允许的参数让我这个错误信息:
unknown attribute: correct
(这一个实际上抛出一个错误消息,我不必去挖日志找到)
我该如何获得表单助手来读取问号?
我不确定列名是否支持'?'。 – cortex