Hello, let's continue talking about the model of fonts feature. The next feature which I will talk about will be cascaded list of values. What does mean cascade list of value, it means there are we have some lists of value which are dependent on each other. For example, if you have a region country cities so once the user select the region you want to filter the country depending on the selected region and once you select a country you want to filter the location or the or the city depending on the selected country this is called cascading list of value. So, if you your page or your form have two or three or four multiple lists of value and each list of value depending on the value which the user will select from the previous value, we call it cascade list often. So how to implement this cascade list of value The steps to do that first we will create all view object which will be used as a list of value okay.

So, if we have lists of value for regions we create a view object which will get a list of region and the Create view object which will return a list of countries and the courage to issue a written list of locations. So, once you create all the object, which will be used as a list of value, the second step we will create view criteria for all view object which will be filtered. For example, the countries will be filtered the bindi on the region. So, we need to create a list of sorry view criteria in their countries same in their city or their location. So, the cities will be filtered depending on secondaries. So, any view object will be filtered.

So we need to create View criteria for this view object. So, region is a master one will not be filtered, so no need to create the criteria for the region, but we will create for the countries and cities. After we create the view criteria we create a list of value for each attribute and we need to pass the parameter to the view correctly. So we will create this value in region but there is no parameter here. Then we will carry this over in countries and need to select to boss the region's parameter to the country and select and create lists of value city I need to send some parameters to the city depending on the selected country. So this is a third step to create this to value over each attribute on the bus over MTA to view criteria for this step is we will need to sit in auto submit and the dependency in the view object attribute level.

I will show How you can do this, this actually will a you have to do this if you need to use this cascading list of value in the query. If query button if you create a search screen, in that case you have to do it. But if you cascade it, this value will use to be only used as a form means a GCF, so no need to do this, but I will let you know how to do this. The fifth step is in a big level is just a label, you have to set an auto submit and the boss will trigger to filter the data. So if you select a region, you need to filter the country. So you add you have to miss it this submit to be true.

And since the boresha trigger of the country was the region, I will show you how you can implement this. This is a cascaded list of value. So the next video will go step by step and implement this cascade at least two value. So see you next activity.