rails - problem when install nokogiri cannot discover where libxml2 is located on your system.

Update

For those using El Capitan the following command will work:

gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/libxml2 --use-system-libraries


sierra

gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/libxml2 --use-system-libraries





http://stackoverflow.com/questions/19643153/error-to-install-nokogiri-on-osx-10-9-maverick

swift send value via HTTPHeader

i.e authentication

http://stackoverflow.com/questions/35071753/send-data-through-params-to-rails-app-from-ios-in-swift

request.setValue("XXXXXXXXXX", forHTTPHeaderField: "Authorization")

func postRequest2(x: String) {
    let string = "http://localhost:3000/api/users/2/products"
    let url = NSURL(string: string)
    let session = NSURLSession.sharedSession()
    let request = NSMutableURLRequest(URL: url!)
    let params = ["title": "Fifth Title"]
    request.setValue("XXXXXXXXXX", forHTTPHeaderField: "Authorization")
    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    request.HTTPMethod = "POST"
    do {
        request.HTTPBody = try NSJSONSerialization.dataWithJSONObject(params, options: NSJSONWritingOptions.PrettyPrinted)
    }
    catch {

    }
    let tache = session.dataTaskWithRequest(request) { (data, response, error) -> Void in
        if let antwort = response as? NSHTTPURLResponse {
            let code = antwort.statusCode
            print(code)
        }
    }
    tache.resume()

}




swift - A Simple Table View Example

https://medium.com/@ronm333/a-simple-table-view-example-in-swift-cbf9a405f975#.egj26mr64

Swift waitUntilAllTasksAreFinished error

http://stackoverflow.com/questions/26947608/waituntilalltasksarefinished-error-swift

func checkLogin(succeed: Bool, msg: String) {
    if (succeed) {

        NSOperationQueue.mainQueue().addOperationWithBlock {
            self.performSegueWithIdentifier("logInTrue", sender: self)
        }        

    }
}

swift - NSUserDefaults

https://www.hackingwithswift.com/example-code/system/how-to-save-user-settings-using-nsuserdefaults

let defaults = NSUserDefaults.standardUserDefaults()
defaults.setInteger(25, forKey: "Age")
defaults.setBool(true, forKey: "UseTouchID")
defaults.setDouble(M_PI, forKey: "Pi")

defaults.setObject("Paul Hudson", forKey: "Name")
defaults.setObject(NSDate(), forKey: "LastRun")

When you set values like that, they become permanent – you can quit the app then re-launch and they'll still be there, so it's the ideal way to store app configuration data.

As mentioned, you can use NSUserDefaults to store arrays and dictionaries, like this:

let array = ["Hello", "World"]
defaults.setObject(array, forKey: "SavedArray")

let dict = ["Name": "Paul", "Country": "UK"]
defaults.setObject(dict, forKey: "SavedDict")

When it comes to reading data back, it's still easy but has an important proviso: NSUserDefaults will return a default value if the setting can't be found. You need to know what these default values are so that you don't confuse them with real values that you set. Here they are:

• integerForKey() returns an integer if the key existed, or 0 if not.
• boolForKey() returns a boolean if the key existed, or false if not.
• floatForKey() returns a float if the key existed, or 0.0 if not.
• doubleForKey() returns a double if the key existed, or 0.0 if not.
• objectForKey() returns AnyObject? so you need to conditionally typecast it to your data type.

With that in mind, you can read values back like this:

let defaults = NSUserDefaults.standardUserDefaults()

let age = defaults.integerForKey("Age")
let useTouchID = defaults.boolForKey("UseTouchID")
let pi = defaults.doubleForKey("Pi")

When retrieving objects, the result is optional. This means you can either accept the optionality, or typecast it to a non-optional type and use the nil coalescing operator to handle missing values. For example:

let array = defaults.objectForKey("SavedArray") as? [String] ?? [String]()

rails api docs

important one :

http://apionrails.icalialabs.com/book/chapter_one

its github
https://github.com/kurenn/market_place_api

User Authentication on iOS with Ruby on Rails and Swift

https://www.raywenderlich.com/85528/user-accounts-ios-ruby-rails-swift

github

https://github.com/subhransu/railsauth

some blogs

http://www.yoniweisbrod.com/rails-api-mini-guide/

https://labs.kollegorna.se/blog/2015/04/build-an-api-now/

http://www.andrewhavens.com/posts/20/beginners-guide-to-creating-a-rest-api/

https://codedecoder.wordpress.com/2013/02/21/sample-rest-api-example-in-rails/

api problem Stub Method error in request spec

according to the tutorial
http://apionrails.icalialabs.com/book/chapter_five

to setting current_user will face a problem

Failure/Error: authentication.stub(:request).and_return(request)

http://stackoverflow.com/questions/26428882/stub-method-error-in-request-spec

require 'rails_helper'

class Authentication
  include Authenticable
end

describe Authenticable, :type => :controller do
  let(:authentication) { Authentication.new }

  describe "#current_user" do
    before do
      @user = FactoryGirl.create :user
      request.headers["Authorization"] = @user.auth_token
      allow(authentication).to receive(:request).and_return(request)
    end

    it "returns the user from the authorization header" do
      expect(authentication.current_user.auth_token).to eql @user.auth_token
    end
  end
end

app/controllers/concerns/authenticable.rb

module Authenticable
  # Devise methods overwrites
  def current_user
    @current_user ||= User.find_by(auth_token: request.headers['Authorization'])
  end

  def request
    request
  end
end