Mel*_*Mel 8 polymorphism ruby-on-rails polymorphic-associations
我正在尝试将Evaluation模型添加到我的Rails 4应用中.
我做了一个名为的模型evaluation.rb.它有:
class Evaluation < ActiveRecord::Base
belongs_to :evaluator, :polymorphic => true
belongs_to :evaluatable, :polymorphic => true
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我也提出了担忧evaluator,并evaluatable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
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我在用户模型中包含了每个问题:
class User < ActiveRecord::Base
include Evaluator
include Evaluatable
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在我的展示页面中,我想展示特定用户的评估(从其他用户 - 他们是评估者)收到.
在我的节目中,我有:
<% Evaluation.find(params[:id]).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>
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在我的评估表中,我不确定如何指定评估的接收者.我已经制作了基本表格,但我不清楚如何将其与应该接受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} %>
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我的评估表有:
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
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质询
如何设置节目页面以显示收到的用户评估?
如何调整表单以便将用户ID指定为应该接收评估的人?
如何设置显示页面来显示收到的用户评价?
您对模型的关注应该对您有所帮助。在您的UsersController#show操作中,只需添加以下内容即可解决问题:
@received_evaluations = @user.received_evaluations
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然后您可以在您的展示模板中使用它:
<% @received_evaluations.each do |evaluation| %>
// render some view stuff
<% end %>
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或者使用集合渲染。
注意:Evaluation.find(...)当前在您视图中的内容应该放在控制器操作中,将其保留在视图中并不是一个好的做法。
如何调整表单,以便将用户 ID 指定为应接受评估的人员?
如果您已经确定了将充当的用户,则evaluatable可以在控制器操作或视图表单中进行设置,以防您的页面上有要评估的用户列表。
在控制器中:
@evaluation.evaluatable_id = user_to_evaluate.id
@evaluation.evaluatable_type = user_to_evaluate.class.to_s
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或者这个更简单的语句应该做同样的事情:
@evaluation.evaluatable = user_to_evaluate
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同样,您应该能够以相同的方式设置评估器:
@evaluation.evaluator = user_that_evaluates
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视图中:
<% @users_to_evaluate.each do |user| %>
<%= simple_form_for(Evaluation.new) 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} %>
<%= f.hidden_field :evaluator_id, :value => current_user.id %>
<%= f.hidden_field :evaluator_type, :value => current_user.class.to_s %>
<%= f.hidden_field :evaluatable_id, :value => user.id %>
<%= f.hidden_field :evaluatable_type, :value => user.class.to_s %>
</div>
<% end %>
<% end %>
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