Ruby – Find or create record through factory_girl association

Finally fixed this and I hope I can save someone the six hours of debugging it took me to figure it out.

By a) getting lucky and ending up with a version of code that worked and b) stripping both sets of code down this is what I found:

Test that chokes up

require 'spec_helper'

describe UsersController do

  @user = Factory.create(:user) 
end

Test that works

require 'spec_helper'

describe UsersController do

  it "should make a factory models without choking" do
    @user = Factory.create(:user)   
  end
end

The transaction is defined by the it "should do something" do... statement. If you instantiate the factory outside that statement it turns out not to be transactional.

You can also put it outside the "it should.." block as long as it's in a "before..end" block

require 'spec_helper'

describe UsersController do

  before(:each) do
    @user = Factory.create(:user) 
  end

  it 'should make a factory without choking' do
    puts @user.name
    # prints out the correnct name for the user
  end
end

On experimenting, it seems to be valid to define a user outside of an "it should do..end" block as long as it's in a "before.. end" block. I guess this is only executed in the scope of the "it should do..end" block and therefore works fine.

[Thanks to @jdl for his (also correct) suggestion]

I think you will need to draw to a Bitmap, then in the OnPaint Method, draw that bitmap to the window. I will demonstrate in a moment.

As Hans pointed out, in the OnPaint method you are setting

formGraphics = e.Graphics;

but at the end of the method e.Graphics is disposed, so you can't use it anymore, if your code got to

Engine.Draw(formGraphics);

you would get an exception.

So basically you need to have a global

Bitmap buffer = new Bitmap(this.Width, this.Height)

in your asynced thread you would invoke your drawing to that Bitmap you can use

Graphics g=Graphics.FromBitmap(buffer);//

To get a graphics object, but remember you have to

g.Dispose()

it or wrap it in a

using (Graphics g=Graphics.FromBitmap(buffer))
{
//do something here

}

I am going to play with it for a few moments and see if I can get you a working sample

EDIT Here's your working sample. I started a new form and tossed a button on it. I changed the mainform backgroundimagelayout to none.

I think you need to be using .net 4.0 or better, if not using this, let me know I can change it to match your version... I think.

//you need this line to use the tasks
using System.Threading.Tasks;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    public void Draw()
    {
        Bitmap buffer;
        buffer = new Bitmap(this.Width, this.Height);
        //start an async task
        Task.Factory.StartNew( () =>
        {
                using (Graphics g =Graphics.FromImage(buffer))
                {
                    g.DrawRectangle(Pens.Red, 0, 0, 200, 400);
                    //do your drawing routines here
                }
            //invoke an action against the main thread to draw the buffer to the background image of the main form.
            this.Invoke( new Action(() =>
            {
                    this.BackgroundImage = buffer;
            }));
        });

    }

    private void button1_Click(object sender, EventArgs e)
    {
        //clicking this button starts the async draw method
        Draw();
    }

}

}