Question

这是我为温度创建图表线图的代码..... 但显示的图表显示所有用户输入的值，而不仅仅是登录的用户.....

这是在app / views / temperature / index.html.erb

中

                <% if !flash[:notice].blank? %>
                  <div class="alert alert-info">
                  <%= flash[:notice] %>
                  </div>
                <% end %>
                <br />

                <h1>Body Temperatures</h1>
                <%= javascript_include_tag "//www.google.com/jsapi", "chartkick" %>
                <div style="border:2px solid black">
                <%= line_chart Temperature.group("date(temperatures.date)").average(:temperature),xtitle: "Date", ytitle: "Temperature"%>
                </div>
                <br>
                <table class ="table table-striped">
                  <thead class ="thead thead-default">
                    <tr>
                      <th>Date</th>
                      <th>Temperature</th>
                      <th>Unit of Measure</th>
                      <th colspan="3"></th>
                    </tr>
                  </thead>

                  <tbody>
                    <% @temperatures.each do |temperature| %>
                      <tr>
                        <td><%= temperature.date.strftime("%m/%d/%Y") %></td>
                        <td><%= temperature.temperature %></td>
                        <td><%= temperature.measured %></td>
                        <td><%= link_to 'Show', temperature,class: 'btn btn-mini' %></td>
                        <td><%= link_to 'Edit', edit_temperature_path(temperature),class: 'btn btn-mini btn-success' %></td>
                        <td><%= link_to 'Destroy', temperature, method: :delete,class: 'btn btn-mini btn-danger', data: { confirm: 'Are you sure?' } %></td>
                      </tr>
                    <% end %>
                  </tbody>
                </table>

                <div id="paginator">
                <%= paginate @temperatures %>
                </div>

                <br>

                <%= link_to 'New Temperature', new_temperature_path,class: "btn btn-secondary"%>

如何修改相同内容以便仅从此特定用户输入的数据中选择和显示图表

这是我的温度控制器：

                class TemperaturesController < ApplicationController
                  before_action :authenticate_user!
                  before_action :set_temperature, only: [:show, :edit, :update, :destroy]

                  # GET /temperatures
                  # GET /temperatures.json
                  def index
                    @temperatures = current_user.temperatures.page(params[:page]).per(3)
                  end

                  # GET /temperatures/1
                  # GET /temperatures/1.json
                  def show
                    @temperatures = Temperature.find_by(user_id: current_user.id) if current_user
                  end

                  # GET /temperatures/new
                  def new
                    @temperature = current_user.temperatures.build
                  end

                  # GET /temperatures/1/edit
                  def edit
                  end

                  # POST /temperatures
                  # POST /temperatures.json
                  def create
                    @temperature = current_user.temperatures.build(temperature_params)

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

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

                  # DELETE /temperatures/1
                  # DELETE /temperatures/1.json
                  def destroy
                    if current_user.id == @temperature.user.id
                      @temperature.destroy
                      respond_to do |format|
                        format.html { redirect_to temperatures_url, notice: 'Temperature was successfully destroyed.' }
                        format.json { head :no_content }
                        end
                    else
                    redirect_to root_path, notice: "You don't have permission."
                    end
                  end

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

                    # Never trust parameters from the scary internet, only allow the white list through.
                    def temperature_params
                      params.require(:temperature).permit(:date, :temperature, :measured)
                    end
                end

Answer 1

您可以获得此行中所有用户的温度：

<%= line_chart Temperature.group("date(temperatures.date)").average(:temperature),xtitle: "Date", ytitle: "Temperature"%>

如果您只想为一个用户提供温度，那么您必须在下面的查询中提及：

<%= line_chart Temperature.where(:user_id => current_user.id).group("date(temperatures.date)").average(:temperature),xtitle: "Date", ytitle: "Temperature"%>

Rails仅为特定用户显示chartkick图

1 个答案: