我的rails应用程序中有2个模型。用户和目标。我将它们设置为这样:
用户模型
class User < ApplicationRecord
has_one :goal, dependent: :destroy
end
目标模型
class Goal < ApplicationRecord
belongs_to :user, optional: true
end
每当我尝试创建目标模型的新记录时,都会收到此错误:
undefined method `new' for nil:NilClass
这是我的目标模型的控制器和视图
目标控制器
class GoalsController < ApplicationController
def index
end
def new
@goal = Goal.new
end
def create
@goal = current_user.goal.new(goal_params)
if @goal.save
redirect_to @goal
else
render 'new'
end
end
private
def goal_params
params.require(:goal).permit(:user_id, :goal_type)
end
end
目标视图(新操作(
<%= form_for(@goal) do |f| %>
<div class="field">
<%= f.label :goal_type, "Would you like to..." %>
<%= f.select :goal_type, ["Loose weight", "Gain weight", "Keep current weight"] %>
</div>
<div class="field submit">
<%= f.submit "Submit", class: "button button-highlight button-block" %>
</div>
<% end %>
在我的目标表中,我有一个名为goal_type和user_id的列。我需要这样做,以便在创建新记录时,user_id字段会自动填充current_user id(当然使用 designise(。
提前感谢!
我刚刚将控制器从:
@goal = current_user.goal.new(goal_params)
自:
@goal = current_user.build_goal(goal_params)