Question

好吧，我猜这可能是一个非常直截了当的问题。我似乎打破了我的应用程序的一个功能，它显示了提交帖子的人的用户名（在我的情况下是'pin'）。

这一切都发生在我将用户名添加到数据库（设计）的时候，因为之前我只显示了电子邮件地址，觉得这不是我想要的。

Tl; dr：= pin.user.username （ app / views / pins / index.html.haml ）不显示该用户的用户名提交了这个帖子。但是，它会显示带有 pin.user.email 的电子邮件。

这是我的PinsController（在我的例子中是Pin in the design in devise）

class PinsController < ApplicationController
before_action :find_pin, only: [:show, :edit, :update, :destroy, :upvote, :downvote]
before_action :authenticate_user!, except: [:index, :show]

attr_accessor :username

def index
    @pins = Pin.all.order("created_at DESC")
end

def show
end

def new
    @pin = current_user.pins.build
end

def create
    @pin = current_user.pins.build(pin_params)

    if @pin.save
        redirect_to @pin, notice: "Fit was successfully created"
    else
        render 'new'
    end
end

def edit
end

def update
    if @pin.update(pin_params)
        redirect_to @pin, notice: "Fit was successfully updated"
    else
        render 'edit'
    end
end

def destroy
    @pin.destroy
    redirect_to root_path
end

def upvote
    @pin.upvote_by current_user
    redirect_to :back
end

private

def pin_params
    params.require(:pin).permit(:title, :description, :image)
end

def find_pin
    @pin = Pin.find(params[:id])
end

end

这是我的index.html.haml

#pins.transitions-enabled
- @pins.each do |pin|
    .box.panel.panel-default
        = link_to (image_tag pin.image.url), pin
        %h2= link_to pin.title, pin
        %p.user
            Submitted by
            = pin.user.username

我的架构为用户显示了这个

  add_index "pins", ["user_id"], name: "index_pins_on_user_id"

create_table "users", force: true do |t|
t.string   "email",                  default: "", null: false
t.string   "encrypted_password",     default: "", null: false
t.string   "reset_password_token"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer  "sign_in_count",          default: 0,  null: false
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.string   "current_sign_in_ip"
t.string   "last_sign_in_ip"
t.datetime "created_at"
t.datetime "updated_at"
t.string   "username"
end

我已经附上了我的git，只是你需要一些具体的细节 https://github.com/thgilartlU/MyFitIdentity

Answer 1

你的问题不是haml，你试图显示的用户名似乎是空的。你的haml结构看起来很好。正如您pin_params中提到的那样username是不允许的，因此请确保允许并将其保存到数据库中。比你的haml应该工作。

Answer 2

删除

         public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
//Call to the algorithm class    
RespAlgo myAlgo = new RespAlgo();
        @Override
            protected void onCreate(Bundle savedInstanceState) {
        //Code to initiate the graphs...
        }
         private final BluetoothGattCallback mGattCallback =
                    new BluetoothGattCallback() { 
        public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) 
        {
        // Here I catch the data from the BLE device
         for (int i_bt_nTs = 0; i_bt_nTs < getResources().getInteger(R.integer.bt_nTs); i_bt_nTs++) {
                                //V2V8, S1, S2, S3
                                // k = R3/(Rs + R4) = V2V8/(ADCval * LSB / Gain + V2V8/2) - 1
                                // Rs = R3/k - R4

                                v2v8_val = v2v8_2_bval * 2 * adc_lsb * vbat_correction;
                                k = v2v8_val / (characteristic.getIntValue(FORMAT_UINT16, 2 + 6 * i_bt_nTs) * adc_lsb / ina_gain + v2v8_val / 2) - 1;
                                rs1 = R3 / k - R4;

                                //run the algorithm. the below should move to parallel task
                                // Add counter to the algorithm
                                        myAlgo.addTime();
                                //Add value from the sensor to the algorithm
                                        myAlgo.setValue(rs1);
                                //Return result to rr1 variable
                                        rr1 = (float)myAlgo.getRR();
                                 // Change the UI with the new value
                                        myRR1.setText(String.valueOf(rr1));

        }
        }

来自您的attr_accessor :username def username=(username) @username = username end模型文件，它会混淆ActiveRecord

Post.Username不会在haml中显示？

2 个答案: