This is Chapter 17. If you want to go back to the beginning, you can find it here: Chapter 1.

Go back to Chapter 16: The_1000_steps_program_to_MDriven_Chapter_16

Default names , dim default, plural suffix, what happens when model is changed - is your data lost?

Modal window - pick a seller

Check valid action based in current state with oclIsInState

Make use of GetSystemURL Eco.ExternalLateBound function to make our report work on any server

Video for chapter 17 https://youtu.be/m1oer_jjQh4

531	Change the name of a Association that has data in it - what happens on evolve with exiting data
532	Update the versions on MDrivenServer
533	Follow the discussion of where foreign keys are stored in the database
534	Rename the CarFactory.BrandOfCar and check with changes what would happen
535	Follow the discussion of Former-Names and understand benefit to move data when things change in the db
536	Follow the discussion of the rename-function vs just changing the name
537	In the CarFactoryView - amend the action CreateAndAddCodumentForSales according to the video
538	Follow the discussion what ViewModel column names that has underscore in them
539	Follow the discussion on whay it is unnecessary to set both ends of an association in MDriven
540	Amend the expression for CreateAndAddCodumentForSales to set the selected Car
541	Add the Cars registration and State to the DocumentForSales grid
542	Discover that The we actually use the state machine to create the paperwork for a sale
543	Clean up the model according to the video
544	Set up the rule to stop deletion of the PaperWork as long as a is not in InOwnershipTransaction
545	Create a new Viewmodel named CarDealerPicker - by using UIHints CopyValueStore autoForm
546	Move the global action into the Views manuGroup
547	Clean up un needed columns from the DocumentForSales grid
548	Add an action in DocumentForSales grid - call it PickBuyer
549	Create a new ViewModelAction that bring up our the new CarDealerPicker viewModel - call that also PickBuyer
550	Set the PickBuyer viewmodel action as "Is modal"
551	When you show a dialog as modal you must give an expression to decide when the "Ok" button in the modal should show - set it to vCurrent_CarDealer->notempty
552	When you have a dialig as model - you can also perfom something specific upon the user pressing OK - This is called the Expression after modal ok. In our case we want to vCurrent_DocumentForSales.Buyer:=vModalResult_vCurrent_CarDealer
553	Save model - and upload it to MDrivenServer
554	Test to assign a buyer - see that the CarDealer-picker shows - but it is empty
555	Go to Views/CarDealerPicker - and use the left side actions to create 3 dealers - give them names - save
556	Navigate back to the CarFactoryView and test the Pick buyer button again
557	Verify that the DeleteDocumentForSales readonly rule works as designed - not allowing delete of paperwork in a Ownership transaction
558	Initiate sale of a new car. Verify that you cannot do Initiate sale on a car that already is in a Ownership transaction
559	Follow the discussion in the video on why the report does not work any longer.
560	Follow the discussion on how to get a access to the servers own adress from within our model
561	Follow the discussion on methods tagged with Eco.ExternalLateBound tag value
562	In the report template viewmodel TheTemplateForCarTransferOwnersdhipDocumentReport change the TemplateUrl expression to NOT return a hard coded server address but rather ask the system for the correct server address just in time.
563	Upload the model and test to produce the document.

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