[英]Ruby on Rails “has_many :through” association return an array
[英]Ruby on Rails : Filter with has_many :through Association
我的index.html.erb中有一個表單,我想用“合格”表過濾項目。 has_many:through association怎么辦? 我在控制器中寫了一個請求,但不起作用。
非常感謝您的建議!
型號:Project_eligible.rb
class ProjectEligible < ApplicationRecord
belongs_to :project
belongs_to :eligible
end
project.rb
class Project < ApplicationRecord
has_many :project_eligibles
has_many :eligibles, through: :project_eligibles
scope :eligibles, -> (eligibles) { where eligibles: eligibles }
end
eligible.rb
class Eligible < ApplicationRecord
has_many :project_eligibles
has_many :projects, through: :project_eligibles
end
控制器:project_controller.rb
def index
@search = Search.new(search_params)
@eligibles = Eligible.all
session[:search] = params[:search] if params[:search].present?
request = Project
return @projects = request.page(params[:page]).order("expiration ASC").paginate(:page => params[:page], :per_page => 2) unless session[:search].present?
request = request.joins(:eligibles).where(eligibles: session[:search]['eligibles']) if session[:search]['eligibles'].present?
@projects = request.page(params[:page]).order("expiration ASC").paginate(:page => params[:page], :per_page => 2)
end
private
def search_params
if params[:search].present?
p = params.require(:search).permit!
session[:search] = p
else
session[:search]
end
end
查看:Index.html.erb
<div class="form-inputs" id="form">
<%= simple_form_for @search, method: :get, url: projects_path do |f| %>
<div>
<%= f.input :eligible, :include_blank => "Tous publics", required: false, label: false, collection: @eligibles, class: 'form-control' %>
</div>
<div>
<%= f.submit 'GO', class: 'btn btn-primary paddind-category btn-from-search' %>
</div>
<% end %>
</div>
解決方案是:
request = request.joins(:project_eligibles).where(project_eligibles: {eligible_id: session[:search]['eligible']}) if session[:search]['eligible'].present?
不是: request = request.joins(:eligibles).where(eligibles: session[:search]['eligibles']) if session[:search]['eligibles'].present?
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