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Next, update the ApiKey model to reflect its associations with User and KeyAccess, as well as the necessary validations and a method to generate a unique key string. The edited file is shown in Listing 8-4. Listing 8-4. Updating app/models/api_key.rb require 'digest/sha1' class ApiKey < ActiveRecord::Base before_validation_on_create :generate_identifier belongs_to :user has_many :key_accesses, :dependent => :destroy validates_presence_of :user_id, :identifier validates_uniqueness_of :identifier private def generate_identifier seed = "#{ApiKeyself.class.count}--#{self.user_id}--#{Time.now.to_i}" self.identifier = Digest::SHA1.hexdigest(seed) end end Similarly, you ll need to update the KeyAccess model to record its association with ApiKey, as in Listing 8-5. Listing 8-5. Completed app/models/key_access.rb class KeyAccess < ActiveRecord::Base belongs_to :api_key end With the model layer completed, you can now turn to the front end. First, you need to make sure that your users can get to their API keys, reviewing them and managing them as necessary. For that, you need to tweak your routes by deleting the generator-added map.resources :api_keys line and updating the file as shown in Listing 8-6. Listing 8-6. Nesting the api_keys Resource Under users in config/routes.rb ActionController::Routing::Routes.draw do |map| map.resources :comments map.resource :session map.resource :user, :has_many => [:interests, :notifications, :api_keys] # end generate qr code asp.net mvc Generate a QR Code in ASP . NET C# without using a 3rd party ... I was able to do this on the server using ZXing. Net and exposing an endpoint viaa controller(MVC or Web API). The endpoint would receive data via query string ... asp.net qr code Generate QR Barcode in ASP . Net MVC | Trailmax Tech 14 Sep 2012 ... Net MVC system. There are a lot of free web-services for generating a qr - codesfor you, ( like http:// qrcode .kaywa.com/ ) But this time I did not ... Figure 2-5. Configuring an Eclipse launch configuration to run the Hello World! app Create the Eclipse launch configuration by following these steps: 1. Select Run Run Configurations. 2. In the Run Configurations dialog box, double-click Android Application in the left pane. The wizard will insert a new configuration named New Configuration. 3. Rename the configuration RunHelloWorld. 4. Click the Browse button and select the HelloAndroid project. 5. Under Launch Action, select Launch and select pro.android.HelloActivity from the drop-down list. 6. Click Apply and then Run. You should see the emulator launched with the HelloAndroid project (see Figure 2-6). vb.net ean 13,convert tiff to pdf c# itextsharp,qr code generator in asp.net c#,.net data matrix reader,vb.net code 128 reader,data matrix code word placement asp.net mvc qr code QR Code ASP . NET Control - QR Code barcode image generator ... KA.Barcode for ASP . NET is a fully integrated SDK library to generate advanced and scannable QR Code images in ASP . NET web forms / websites / web pages using C# & VB . NET class library. In addition, web designers & developers can adjust generated barcode images with a user-friendly interface. asp.net qr code Easy QR Code Creation in ASP . NET MVC - MikeSmithDev 11 Oct 2014 ... I was using a (paid) library and it generated gif files that were stored on the ...NET MVC and I wanted the QR Code generation to be easy. Before we run this migration to create categories, though, we also need to add another table to make it possible for us to associate a post to one or more of our categories. The simplest way to do that will be to use a join model that utilizes a has_and_belongs_to_many association. Let s edit our /db/migrate/003_create_categories.rb migration file to add that table as well: class CreateCategories < ActiveRecord::Migration def self.up create_table :categories do |t| t.column :name, :string end create_table :categories_posts, :id => false do |t| t.column :category_id, :integer t.column :post_id, :integer end end def self.down drop_table :categories drop_table :categories_posts end end With that migration saved, we ll run our migration to create the new tables: rake db:migrate Note It might take the emulator a minute to emulate the device-bootup process. After starting up, you asp.net generate qr code ASP . NET MVC QRCode Demo - Demos - Telerik This sample demonstrates the core functionality of ASP . NET MVC QRCodewhich helps you easily encode large amounts of data in a machine readableformat. asp.net mvc generate qr code Dynamically Generating QR Codes In C# - CodeGuru 10 Jul 2018 ... Become more proficient with the functionalities of the QR (Quick Response) Codelibrary that works with ASP . NET MVC applications. This declaration will help to scope the system s keys to specific users, but to make it work you ll also have to update the scaffolded controller and views. To start with, you ll need to add a couple of before filters to the controller one to require logins and another to load a User model from params[:user_id] (since that s what you get from the :has_many declaration in your routes file). While you re there, you might as well remove the edit and update actions, since they re essentially meaningless with the keys as simple as they are. You can see the edited file in Listing 8-7. Listing 8-7. Completed app/controllers/api_keys_controller.rb class ApiKeysController < ApplicationController before_filter :login_required before_filter :find_api_key_user # GET /api_keys # GET /api_keys.xml def index @api_keys = @user.api_keys.find(:all) respond_to do |format| format.html # index.html.erb format.xml { render :xml => @api_keys } end end # GET /api_keys/1 # GET /api_keys/1.xml def show @api_key = @user.api_keys.find(params[:id]) respond_to do |format| format.html # show.html.erb format.xml { render :xml => @api_key } end end # GET /api_keys/new # GET /api_keys/new.xml def new @api_key = @user.api_keys.build respond_to do |format| format.html # new.html.erb format.xml { render :xml => @api_key } end end should see HelloAndroidApp running in the emulator, as shown in Figure 2-6. In addition, be aware that the emulator starts other applications in the background during the startup process, so you might see a warning or error message from time to time. 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