Question

感谢您的帮助。我正在使用Rails 4.2.6并尝试为健身房制作想象网站的搜索表单。

在每个页面上，我都有一个代码为

的搜索表单

  <%= form_tag "/client_workouts/find" do %>
    <%= text_field_tag :search_string %>
    <%= submit_tag "Search" %>
  <% end %>

my routes.rb：

Rails.application.routes.draw do
  resources :client_workouts

  post 'client_workouts/find' => 'client_workouts#find'
end

我的schema.rb：

ActiveRecord::Schema.define(version: 20161103044039) do

  create_table "client_workouts", force: :cascade do |t|
    t.string   "client_name"
    t.string   "trainer"
    t.integer  "duration_mins"
    t.date     "date_of_workout"
    t.decimal  "paid_amount"
    t.datetime "created_at",      null: false
    t.datetime "updated_at",      null: false
  end

end

和我的脚手架client_workouts_controller.rb（＆＃39; def find＆＃39;我编辑了以使搜索表单工作）：

class ClientWorkoutsController < ApplicationController
  before_action :set_client_workout, only: [:show, :edit, :update, :destroy]

  def find
    @client_workouts = ClientWorkout.find(:all, 
      :conditions=>["client_name = ? OR trainer = ?", params[:search_string], params[:search_string]])
  end

  # GET /client_workouts
  # GET /client_workouts.json
  def index
    @client_workouts = ClientWorkout.all
  end

  # GET /client_workouts/1
  # GET /client_workouts/1.json
  def show
  end

  # GET /client_workouts/new
  def new
    @client_workout = ClientWorkout.new
  end

  # GET /client_workouts/1/edit
  def edit
  end

  # POST /client_workouts
  # POST /client_workouts.json
  def create
    @client_workout = ClientWorkout.new(client_workout_params)

    respond_to do |format|
      if @client_workout.save
        format.html { redirect_to @client_workout, notice: 'Client workout was successfully created.' }
        format.json { render :show, status: :created, location: @client_workout }
      else
        format.html { render :new }
        format.json { render json: @client_workout.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /client_workouts/1
  # PATCH/PUT /client_workouts/1.json
  def update
    respond_to do |format|
      if @client_workout.update(client_workout_params)
        format.html { redirect_to @client_workout, notice: 'Client workout was successfully updated.' }
        format.json { render :show, status: :ok, location: @client_workout }
      else
        format.html { render :edit }
        format.json { render json: @client_workout.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /client_workouts/1
  # DELETE /client_workouts/1.json
  def destroy
    @client_workout.destroy
    respond_to do |format|
      format.html { redirect_to client_workouts_url, notice: 'Client workout was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_client_workout
      @client_workout = ClientWorkout.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def client_workout_params
      params.require(:client_workout).permit(:client_name, :trainer, :duration_mins, :date_of_workout, :paid_amount)
    end
end

但是当我试图通过表格找到某些东西时，我得到了：

Couldn't find all ClientWorkouts with 'id': 
(all, {:conditions=>["client_name = ? OR trainer = ?", "lol", "lol"]}) 
(found 0 results, but was looking for 2)

Extracted source (around line #5):
  def find
    @client_workouts = ClientWorkout.find(:all, 
      :conditions=>["client_name = ? OR trainer = ?",
 params[:search_string], params[:search_string]])
  end

Answer 1

您的查询应该是

ClientWorkout.where("client_name LIKE ? OR trainer LIKE ?", "%#{params[:search_string]}%", "%#{params[:search_string]}%")

此外，Find是来自ActiveRecord的方法，它接受id或ids或object来查找记录。它还接受collection ids来从表中返回记录。你编写查询的方式可能不对。

我建议查看此页面：http://guides.rubyonrails.org/active_record_querying.html如果您刚开始学习Rails 那么我强烈建议你阅读Crafting Rails和其他书籍。一切顺利

Rails - 搜索表单返回错误

1 个答案: