Hello, let's continue talking about writing Java code in entity Ember. So as the last thing I need to talk about it is a do DML DML is the demolition language which you need to check before insert or before update before delete, or after insert after update after delete. So let's try to see how it works. So, now if you want before insert zero in the database, you want to do something you can say it it looks like same like create after after create. For example, you need to do something or before create yes pause this create is a little level. It means once a row is inserted or created into a traitor, it will execute this but do they mean it will not be executed do the mill will execute once the data of the row is inserted into database.
So here is a There are two stages once the user in create insert in the page it will carry to the iterative level. But once the user commit or save the changes, it will go for the Dudamel. Okay so let's try to see how you can do this. Now if you want to say before the row inserted into the database you want to do something so how you can do this we can right if bration equal equal DML. Insert code right here. So to just to Brent, I am in pre searched in dm Okay, we can do the same here for DML update deema delete.
Okay hearing briefly pre update. Okay we can take the team here after solver so here after or posts, insert or post update post delete. Okay even you can print any of the department ID or whatever if you want to see get a department ID if you want to just to print it or to use it to see what is exactly the worst we will be inserted. Here updated if you want to see what is the department ID, which is updated. And here was the partment update, which is what is it wasn't it which is deleted and so on so you can notice is here as well. Okay, so now let's try see this print statement.
Okay, so in this because some time once you change in the model layer embell you need to stop the application and run it again on deployments Okay, so let's try it again. Let's have a look. Okay so now Once I press Create insert, okay in the look you will find only that the soup or system print out which Enza create those new department knows this is into sitter because we set it here here's what we didn't write any soup here in author here but if we brought here any soap you will see it. So here once you set the department name it will go here in the setter and it printed this bed. Okay but you will find here there is no do a million search before is printed or after no why because It will work only once that is created. So the curate here is orc once the user is a bitch living in a traitor living briskly.
Now the traitor is a big definition as I told you what which images are on a treat or wish to hold the view object result or department. So once user try to create a row here, it means it will affect here is a create method, but DML is for database living. So let's try to enter for example database a sorry, a department ID 501. Okay, and once I now press commit, let's try to remove can use this and see if I press commit. So once I press commit here, you will fight. I am in the pre insert of the department, Pfizer one so prefers and then after that zero is inserted into the database it will run suppose insert, so, to do de Mille is a good way, if you want to do something before the row is inserted in database Exactly, and after the row is inserted database Seaman's update if you try to update this department and try to save so, now in there you will find here in the re update have been and most updates happen.
So, here's the green surgery update. Breathe insert and post insert and here be update after update. So, if you delete if if you delete this now, like this, it will not display here a delete statement why because now it is deleted from a threat or Live in So, it should display anything in the Remove because now is the Remove is in Delhi insert a return label. So, now I delete a row once I save. Now, you will find here I am in pre delete and boss delete or the department 501. So, this is how you can use, do DML for insert, update, delete or boss insert, post update post delete, you can write your own business you already check.
And if you find any exception of your own two stops operation you can raise an exception to stop this operation. They will try to show this example once I create a completed application. So now this is the old programmatic things you can do in the entity Ember. I will go for the next one is the view object living how write some code is a view object. So I will explain this negativity associated with negativity