评估-反馈回路上的多态关联 [英] Evaluation - polymorphic associations on feedback loop
问题描述
我试图弄清楚如何在Rails 4应用程序中实现评估模型.
我以前曾问过这些相关问题，但尚未解决此问题:
我有:
class Evaluation < ActiveRecord::Base
belongs_to :evaluator, :polymorphic => true
belongs_to :evaluatable, :polymorphic => true
我也对评估者表示担忧，可以评估为:
module Evaluator
extend ActiveSupport::Concern
included do
has_many :given_evaluations, as: :evaluator, dependent: :destroy, class_name: 'Evaluation'
end
end
module Evaluatable
extend ActiveSupport::Concern
included do
has_many :received_evaluations, as: :evaluatable, dependent: :destroy, class_name: 'Evaluation'
end
end
我已经将每个关注点都包括在我的用户模型中:
class User < ActiveRecord::Base
include Evaluator
include Evaluatable
在我的显示页面上，我想显示特定用户的评估(从其他用户那里获得，他们是评估者).
在我的节目中，我有:
<% Evaluation.find(params[:id]).received_evaluations.order('created_at DESC').each do |eval| %>
<div id="portfolioFiltering" class="masonry-wrapper row">
<%= eval.remark %>
<%= eval.personal_score %>
<small><%= eval.created_at %></small>
在我的评估表中，我不确定如何指定评估的接受者.我已经完成了基本表单，但是我不清楚如何将其与应该接收评估的用户联系起来.
<%= simple_form_for(@evaluation) do |f| %>
<%= f.error_notification %>
<div class="form-inputs">
<%= f.input :score, collection: 1..10, autofocus: true, :label => "How do you rate this experience (1 being did not meet expectations - 10 being met all expectations) ?" %>
<%= f.input :remark, as: :text, :label => "Evaluate your project experience", :input_html => {:rows => 10} %>
我的评估表具有:
t.integer "user_id"
t.integer "evaluatable_id"
t.string "evaluatable_type"
t.integer "overall_score"
t.integer "project_score"
t.integer "personal_score"
t.text "remark"
t.boolean "work_again?"
t.boolean "continue_project?"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_index "evaluations", ["evaluatable_type", "evaluatable_id"], name: "index_evaluations_on_evaluatable_type_and_evaluatable_id", unique: true, using: :btree
在我的用户控制器中，我有:
def show
# authorize! :read, @user
@received_evaluations = @user.received_evaluations
end
我目前收到一条错误消息:
undefined method `received_evaluations' for #<Evaluation:0x007fb8c4b32160>
我不确定此消息的含义或解决方法.
如果我将演出更改为:
<% @user.received_evaluations.each do |eval| %>
我收到此错误:
undefined method `received_evaluations' for nil:NilClass
在阅读有关此问题的不同问题时，我认为正在尝试建立一种机制来评估一个User评估另一个User的问题.
基于上述逻辑，不需要使用多态关联.它们可能会使您的事情变得过于复杂.
这是我认为您需要的:
class User
has_many :given_evaluations, foreign_key: :evaluator_id, class_name: Evaluation
has_many :received_evaluations, foreign_key: :evaluatee_id, class_name: Evaluation
end
class Evaluation
belongs_to :evaluator, foreign_key: :evaluator_id, class_name: User
belongs_to :evaluatee, foreign_key: :evaluatee_id, class_name: User
end
您的评估表如下:
id :integer not null, primary key
evaluator_id :integer not null
evaluatee_id :integer not null
overall_score :integer
continue_project :boolean
created_at :datetime not null
updated_at :datetime not null
然后可以取消使用Evaluator和Evaluatable模块.
因此，现在要显示用户收到的评估并摆脱您收到的错误消息:
在控制器中:
# ensure we get the user for all relevant routes
before_filter :get_user, only: [:show, edit, :update, :destroy]
def get_user
@user = User.find(params[:id])
end
def show
# get the received evaluations and order
@received_evaluations = @user.received_evaluations
@received_evaluations = @received_evaluations.order('created_at DESC')
# you will probably want grab the evaluator record as well...
@received_evaluations = @received_evaluations.includes(:evaluator)
end
在显示视图中
<% @received_evaluations.each do |eval| %>
<div id="portfolioFiltering" class="masonry-wrapper row">
<%= eval.remark %>
<%= eval.personal_score %>
<small><%= eval.created_at %></small>
...
</div>
<% end %>
I'm trying to figure out how to implement an evaluation model in my Rails 4 app.
I've previously asked these related questions but am yet to solve this problem:
Rails 4 Polymorphic associations and concerns
Rails 4 - post completion evaluations model - structure
I have:
class Evaluation < ActiveRecord::Base
belongs_to :evaluator, :polymorphic => true
belongs_to :evaluatable, :polymorphic => true
I have also made concerns for evaluator and evaluatable as:
module Evaluator
extend ActiveSupport::Concern
included do
has_many :given_evaluations, as: :evaluator, dependent: :destroy, class_name: 'Evaluation'
end
end
module Evaluatable
extend ActiveSupport::Concern
included do
has_many :received_evaluations, as: :evaluatable, dependent: :destroy, class_name: 'Evaluation'
end
end
I have included each concern in my user model:
class User < ActiveRecord::Base
include Evaluator
include Evaluatable
In my show page, I want to show a particular user's evaluations (received from other users -who are evaluators).
In my show, I have:
<% Evaluation.find(params[:id]).received_evaluations.order('created_at DESC').each do |eval| %>
<div id="portfolioFiltering" class="masonry-wrapper row">
<%= eval.remark %>
<%= eval.personal_score %>
<small><%= eval.created_at %></small>
In my evaluations form, I"m not sure how to designate the recipient of the evaluation. I have made the basic form, but I'm not clear about how to tie it to the user who should receive the evaluation.
<%= simple_form_for(@evaluation) do |f| %>
<%= f.error_notification %>
<div class="form-inputs">
<%= f.input :score, collection: 1..10, autofocus: true, :label => "How do you rate this experience (1 being did not meet expectations - 10 being met all expectations) ?" %>
<%= f.input :remark, as: :text, :label => "Evaluate your project experience", :input_html => {:rows => 10} %>
My evaluations table has:
t.integer "user_id"
t.integer "evaluatable_id"
t.string "evaluatable_type"
t.integer "overall_score"
t.integer "project_score"
t.integer "personal_score"
t.text "remark"
t.boolean "work_again?"
t.boolean "continue_project?"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_index "evaluations", ["evaluatable_type", "evaluatable_id"], name: "index_evaluations_on_evaluatable_type_and_evaluatable_id", unique: true, using: :btree
In my users controller, I have:
def show
# authorize! :read, @user
@received_evaluations = @user.received_evaluations
end
I currently get an error that says:
undefined method `received_evaluations' for #<Evaluation:0x007fb8c4b32160>
I'm not sure what this message means or how to solve it.
If I change the show to:
<% @user.received_evaluations.each do |eval| %>
I get this error:
undefined method `received_evaluations' for nil:NilClass
Reading your different questions on this issue I think what are are trying to set up a mechanism for one User to evaluate another User.
Based on the above logic, the use of polymorphic associations is not required. They are probably overcomplicating things for you.
This is what I think you need:
class User
has_many :given_evaluations, foreign_key: :evaluator_id, class_name: Evaluation
has_many :received_evaluations, foreign_key: :evaluatee_id, class_name: Evaluation
end
class Evaluation
belongs_to :evaluator, foreign_key: :evaluator_id, class_name: User
belongs_to :evaluatee, foreign_key: :evaluatee_id, class_name: User
end
Your evaluation table would be like this:
id :integer not null, primary key
evaluator_id :integer not null
evaluatee_id :integer not null
overall_score :integer
continue_project :boolean
created_at :datetime not null
updated_at :datetime not null
You can then do away with the Evaluator and Evaluatable modules.
So, now to display a user's received evaluations and get rid of the error messages you are receiving:
In the controller:
# ensure we get the user for all relevant routes
before_filter :get_user, only: [:show, edit, :update, :destroy]
def get_user
@user = User.find(params[:id])
end
def show
# get the received evaluations and order
@received_evaluations = @user.received_evaluations
@received_evaluations = @received_evaluations.order('created_at DESC')
# you will probably want grab the evaluator record as well...
@received_evaluations = @received_evaluations.includes(:evaluator)
end
And in the show view
<% @received_evaluations.each do |eval| %>
<div id="portfolioFiltering" class="masonry-wrapper row">
<%= eval.remark %>
<%= eval.personal_score %>
<small><%= eval.created_at %></small>
...
</div>
<% end %>
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