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我在努力弄清楚如何設置我的rails評估模型，以便用戶可以使用它來爲其他用戶留下反饋。Rails - 協會，用戶對用戶的反饋 - 顯示反饋
概述了我的問題在這個職位的關鍵部分：
Rails - feedback on specific users, how to set up the form to identify relevant users
我從收到的建議是，建立模型如下：
User.rb
has_many :given_evaluations, foreign_key: :evaluator_id, dependent: :destroy, class_name: Evaluation
has_many :received_evaluations, foreign_key: :evaluatee_id, dependent: :destroy, class_name: Evaluation
評估.rb
belongs_to :evaluator, foreign_key: :evaluator_id, class_name: User
belongs_to :evaluatee, foreign_key: :evaluatee_id, class_name: User
評價控制器
class EvaluationsController < ApplicationController
before_action :set_evaluation, only: [:show, :edit, :update, :destroy]
# before_filter :get_user, only: [:show, :edit, :update, :destroy]
# GET /evaluations
# GET /evaluations.json
def index
# @evaluations = Evaluation.all
@given_evaluations = current_user.given_evaluations
@received_evaluations = current_user.received_evaluations
end
# GET /evaluations/1
# GET /evaluations/1.json
def show
# @received_evaluations = @user.received_evaluations
@evaluation = current_user.received_evaluations.find_by(id: params[:id]) || current_user.given_evaluations.find(params[:id])
# @received_evaluation = current_user.received_evaluations.find params[:id]
end
# GET /evaluations/new
def new
@evaluation = Evaluation.new
end
# GET /evaluations/1/edit
def edit
end
# POST /evaluations
# POST /evaluations.json
def create
# @evaluation = Evaluation.new(evaluation_params)
@evaluation = current_user.given_evaluations.build(evaluation_params)
respond_to do |format|
if @evaluation.save
format.html { redirect_to @evaluation, notice: 'Evaluation was successfully created.' }
format.json { render :show, status: :created, location: @evaluation }
else
format.html { render :new }
format.json { render json: @evaluation.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /evaluations/1
# PATCH/PUT /evaluations/1.json
def update
current_user.given_evaluations.find(params[:id])
respond_to do |format|
if @evaluation.update(evaluation_params)
format.html { redirect_to @evaluation, notice: 'Evaluation was successfully updated.' }
format.json { render :show, status: :ok, location: @evaluation }
else
format.html { render :edit }
format.json { render json: @evaluation.errors, status: :unprocessable_entity }
end
end
end
# DELETE /evaluations/1
# DELETE /evaluations/1.json
def destroy
current_user.given_evaluations.find(params[:id])
@evaluation.destroy
respond_to do |format|
format.html { redirect_to evaluations_url, notice: 'Evaluation was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_evaluation
@evaluation = Evaluation.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def evaluation_params
params[:evaluation].permit(:overall_score, :project_score, :personal_score, :remark, :work_again?, :continue_project?, :evaluatee_id)
end
end
評價形式
<%= simple_form_for(@evaluation) do |f| %>
<%= f.error_notification %>
<div class="form-inputs">
<%= f.select :evaluatee_id, User.all.map{|u| [u.formal_name, u.id]} %>
<%= f.input :overall_score, collection: 1..10, autofocus: true, :label => "How do you rate this project experience (1 being did not meet expectations - 10 being met all expectations) ?" %>
<%= f.input :continue_project?, as: :boolean, checked_value: true, unchecked_value: false, :label => "Do you intend to continue working on the project?" %>
<%= f.input :remark, as: :text, :label => "Evaluate your experience", :input_html => {:rows => 10} %>
</div>
<div class="form-actions">
<%= f.button :submit %>
評價放映視圖
<% @received_evaluations.each do |receval| %>
<div id="portfolioFiltering" class="masonry-wrapper row">
<%= receval.remark %>
<%#= eval.personal_score %>
<small><%= receval.created_at %></small>
</div>
<% end %>
替代嘗試
<% @given_evaluations.each do |receval| %>
<div id="portfolioFiltering" class="masonry-wrapper row">
<%= receval.remark %>
<%#= eval.personal_score %>
<small><%= receval.created_at %></small>
</div>
<% end %>
我現在遇到的問題是，無論我是否儘量展現在表演給出評價或接收的估計，我得到一個錯誤，指出消息：
undefined method `each' for nil:NilClass
我無法弄清楚如何設置模型，以便用戶可以評估其他用戶。我想在各自的展示頁面上顯示每個用戶的評估結果。我無法弄清楚發生了什麼問題。我可以從控制檯看到用戶已收到評估結果如下：
=> #<Evaluation id: 8, evaluatee_id: 34, overall_score: 4, project_score: 5, personal_score: 5, remark: "jhjkhjhjkhkjhjkhjhkhjhkj", work_again?: nil, continue_project?: nil, created_at: "2016-06-12 21:52:53", updated_at: "2016-06-12 21:52:53", evaluator_id: 34>
有一個條目供我正在使用的用戶使用。但是，我找不到一種方式來展示評估。