Stop execution of A5.executeThisThenThat

[dfricke10]

I have this Javascript

function productLookup() {

{dialog.object}.runAction('LookupProduct');
}

function resetField() {

{dialog.Object}.setValue('Search1',"");
}

function addNewRow() {

{dialog.Object}.addRepeatingSectionRow('CONTAINER_3');
this.value='';
}

function setNewField() {

var count = {dialog.Object}._getRepeatingSectionRowCount('CONTAINER_3');
{dialog.Object}.setRepeatingSectionActiveRow('CONTAINER_3',count);
}

var keyCode = event.charCode || event.keyCode;
if (keyCode==13) A5.executeThisThenThat(productLookup,resetField,addNewRow,setNewField);

It's a Point of Sale app.
ProductLookup() does a Lookup and Fill in Fields from the data entered into the Search field, placing the results into a Repeating Section.
resetField() just blanks out the Search field ready for the next product lookup
addNewRow() adds the new row in the Repeating Section for the next product
setNewField() sets the new row as Active.

And the A5.executeThisThenThat is triggered by the 'Enter' key. This entire script is in the onKeyPress of the Search field.

Here's what I want to do. If the product is not found in the productLookup() Lookup and Fill In Fields, I want the entire script to stop with the popup "Item Not Found". I CAN do that with the 'Not Found Action' on the Lookup, but it will continue to run the A5.executeThisThenThat items.

How do I make it stop running the script if the product is not found?

[Davidk]

Re: Stop execution of A5.executeThisThenThat

I'm not sure that you can stop a .executeThisThenThat() method.

Instead, use A5.runChain. Essentially, they do the same thing... but you can stop A5.runChain.

https://www.alphasoftware.com/docume...n%20Method.xml

The doc is, as usual... terrible. The doc does reference both A5.runChain and .executeThisThenThat but they don't bother telling you why they have 2 methods that do essentially the same thing.

Also, the doc doesn't speak to .stop() very well...

Let's say, according to the example code in the doc... that you decide to stop the process at "action2". Instead of calling obj.next()... you would call obj.stop().

function action2(obj) {
    console.log('this is a synchronous function');
    var err = "this is my error"
    obj.stop(err);
    //obj.next();
}

Now... the sample code has a function for the onStop callback. The sample code assumes this callback is called because of an error... but it really could be anything. So... I'd change it a bit...

Action2 would be...

function action2(obj) {
    console.log('this is a synchronous function');
    var msg = "this is my message";
    obj.stop(msg);
    //obj.next();
}

And the A5.runChain method would be...

A5.runChain(actions,
    function() { alert('alldone'); },
    function(msg) { alert('error: ' + msg); }
);

[lvasic]

Re: Stop execution of A5.executeThisThenThat

Thanks, David. This is very insightful information. Thank you for sharing.

[dfricke10]

Re: Stop execution of A5.executeThisThenThat

Thanks, David. I will definitely look into that. I thought a way to have more control was to put this in one xbasic function. So I used this one. But, how would I enter the part that would stop the script if the SKUTemp field is blank?

function getProductInfo as c (e as p)
	
'debug(1)

dim cn AS SQL::Connection
dim rs AS SQL::ResultSet
dim args AS SQL::Arguments
dim productId as n
dim js as c
dim sqlStmt as c
dim flag as l
dim prodData as c

'get the productId
productId = e.dataSubmitted.SKUTemp

flag = cn.Open("::Name::SQL")
if flag = .f. then
	cn.close()
	js = "alert('Error Connecting to Database);"
	getProductInfo = js
	exit function
end if	

sqlStmt = "SELECT TaxExempt, Active, quantity, price, tax1, item_id, item_name, SKU FROM Inventory WHERE item_id = :prodId "
args.set("prodId", productId)

flag = cn.Execute(sqlStmt,args)
if flag = .f. then
	cn.close()
	js = "alert('Error executing query');"
	getProductInfo = js
	exit function
end if

rs = cn.ResultSet
prodData = rs.ToJSONObjectSyntax()

'pass back a call to a Javascript function... including the product info data... now in JSON format.
getProductInfo = "processProductData('" + prodData + "');"

cn.close()

end function

[Davidk]

Re: Stop execution of A5.executeThisThenThat

I feel there's a lot of information missing here. Nonetheless...

What you're doing with your XBasic function in place is... executing code from the Client... where you have the SKUTemp control... and it's value... empty or not.

You're making a callback to the Server... accessing SKUTemp... and then testing SKUTemp at the server to see if you should proceed to do something.

That's like wanting to make a sandwich with rye bread. So you grab the bread box (let's say you have a bread box) and walk to the store. Once you get to the store you open your bread box and find there is a rye bread inside. You say... oh... I don't need to buy a rye bread... I already have one... I'm going home to make a sandwich.

Why start at the client with a value you already have... and go all the way to the server to test it?

[dfricke10]

Re: Stop execution of A5.executeThisThenThat

Ha! I see your point. Let me rework this...

[dfricke10]

Re: Stop execution of A5.executeThisThenThat

Ok. I put a quick client-side javascript validation. It checks for the existence of a value in the SKUTemp field. If no such value, it's done with an alert. If it DOES have a value, off to the Xbasic script to process the lookup for the product info.

I still think I'm kinda running back and forth between Javascript and Xbasic, but it's good for now. I'll sleep on it. Thanks for the help!

[CharlesParker]

Re: Stop execution of A5.executeThisThenThat

Following this thread, I have two statements that I want to run but not if there is an error
the first is:
{dialog.Object}.Submit();

The second one is this:
var po = {dialog.Object}.getParentObject();
po.panelSetActive('LOGIN',true);

I do not want to run the second action if there are errors in the dialogs fields... would I use the chain function OR is there an easier way to stop the submit if there is an error? Without the second action the submit would return to the panel card and give focus to the field with the error. I do not want to proceed with action 2 unless all is good. Can anyone offer me a quick fix for this?

[CharlesParker]

Re: Stop execution of A5.executeThisThenThat

After almost 6 years of doing this I am surprised at how dumb I can be sometimes. What I was trying to do was stop the submittal of a new user account unless there were no errors with the new user account setup. This was much easier solved with the following in the AfterDialogValidate server side function.

dim e.javascript as c
if rtc.flagWebSecurityhasGlobalError = .T. then	
	e.javascript = e.javascript + "alert('"+rtc.WebSecurityGlobalErrorText+"');"
else
	'no errors - new account was created you go back to the parent component where the actual login screen is.
	'The registration component is an embedded object in a persistent login component.
	
	dim js_afterNewAccount as c 
	js_afterNewAccount = <<%txt%
	
		var po = {dialog.Object}.getParentObject();
		po.panelSetActive('LOGIN',true);
	}
	%txt%
	
	e.javascript = e.javascript + ";" + crlf() + js_afterNewAccount
	
	
end if

[jgrannis]

Re: Stop execution of A5.executeThisThenThat

There may be a reason you can't easily do this but what about just doing .runAction('LookupProduct') on the 'Enter' key and inside the LookupProduct Javascript Action run the 3 remaining functions via A5.executeThisThenThat if the conditions you want are met.