Question

嗨我在轨道上有一个控制器，我可以在数据库中呼叫所有玩家。

 @candidates = Player.order("created_at DESC")

我需要的是只展示那些拥有“active = 1”的数据库。我怎样才能在这个上添加where子句..

尝试过这个..问题是主动是一个表叫“用户”而我正在取“玩家”表..

@candidates = Player.where("active = ?", "1").order("created_at DESC")

我输了:(

这是播放器模型的一部分

class Player < ActiveRecord::Base

  belongs_to :user

候选人模特

class Candidate < ActiveRecord::Base
    attr_accessible  :country_id

end

候选人控制员

class CandidatesController < SecureController

  skip_authorize_resource :only => [:index, :show]

  # GET /players
  # GET /players.json
  def index
    @candidates = Player.order("created_at DESC")

    position = params[:position]
    minyear = params[:minyear]
    maxyear = params[:maxyear]
    citizen = params[:nation]

  @candidates = Player.scoped # for Rails 3
 if params[:position].present?
   @candidates = @candidates.where(position: position)
 end


 if params[:minyear].present? 
   @candidates = @candidates.where("birthday >= ?", minyear)
 end

 if params[:maxyear].present?
   @candidates = @candidates.where("birthday <= ?", maxyear)
 end

 if params[:minyear].present? && params[:maxyear].present?
   @candidates = @candidates.where("birthday >= ? AND birthday <= ?", minyear, maxyear)
 end

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @candidates }
    end

    authorize! :show, :candidates
  end

Answer 1

您需要加入用户表：

Player.joins(:user).where("users.active = ?", "1").order("players.created_at DESC")

编写条件的更好方法是：

Player.joins(:user).where(users: { active: true }).order("players.created_at DESC")

将条件添加到Rails控制器

1 个答案: