Trying to Return a Single Value From an Array Gives An Error

Antony · May 21, 2020, 6:16pm

Wappler 2.9.1

Steps to create:

Create a multi-page query, e.g. called lookups which returns a couple of columns such as id and lookup_function from a database table.
The goal is to obtain the value of id when, for example, lookup_function == "stripe_fee_category", and assign it to a session variable.
The assignment that should work is:

{{lookups.where(lookups.lookup_function, "==", "stripe_fee_category").top(1).id}}
or
{{lookups.where(lookups.lookup_function, "==", "stripe_fee_category")[0].id}}

When you run either of these server actions, Wappler gives the following error:

{code: 0, file: "C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\formatters\collections.php",…}
code: 0
file: "C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\formatters\collections.php"
line: 35
message: "Undefined index: "
trace: "#0 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\formatters\collections.php(35): exception_error_handler(8, 'Undefined index...', 'C:\\Users\\anton\\...', 35, Array)↵#1 [internal function]: lib\core\formatter_where(Array, NULL, '==', 'stripe_fee_cate...')↵#2 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(396): call_user_func_array('\\lib\\core\\forma...', Array)↵#3 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(354): lib\core\Parser->objectMember(Object(Closure))↵#4 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(296): lib\core\Parser->primary()↵#5 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(273): lib\core\Parser->group()↵#6 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(253): lib\core\Parser->unary()↵#7 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(243): lib\core\Parser->multiplicative()↵#8 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(233): lib\core\Parser->addictive()↵#9 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(223): lib\core\Parser->bitwiseShift()↵#10 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(213): lib\core\Parser->relational()↵#11 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(203): lib\core\Parser->equality()↵#12 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(193): lib\core\Parser->bitwiseAnd()↵#13 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(183): lib\core\Parser->bitwiseXor()↵#14 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(173): lib\core\Parser->bitwiseOr()↵#15 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(161): lib\core\Parser->logicalAnd()↵#16 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(145): lib\core\Parser->logicalOr()↵#17 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(141): lib\core\Parser->conditional()↵#18 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(86): lib\core\Parser->expression()↵#19 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\App.php(221): lib\core\Parser->parse('lookups.where(l...', NULL)↵#20 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\modules\core.php(109): lib\App->parseObject('{{lookups.where...')↵#21 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\App.php(173): modules\core->setsession(Object(stdClass), 's_expense_strip...')↵#22 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\App.php(137): lib\App->execSteps(Object(stdClass))↵#23 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\App.php(107): lib\App->execSteps(Array)↵#24 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\App.php(72): lib\App->exec(Object(stdClass))↵#25 C:\Users\anton\Dropbox\workshop-angel\dmxConnect\api\subscriber_user_settings\set_session_variables.php(8): lib\App->define(Object(stdClass))↵#26 {main}"

Teodor · May 21, 2020, 6:21pm

Antony why you keep posting the same topics over and over again?
Your other topic with all the comments there is more than enough.

You can just post the result of:

lookups.where(lookups.lookup_function, "==", "stripe_fee_category")[0]

or

{{lookups.where(lookups.lookup_function, "==", "stripe_fee_category").top(1)}}

so we can see what your data is exactly…

And please stop posting the the same issue in multiple topics. It doesn’t help.

Antony · May 21, 2020, 6:22pm

Because it is clear to me it is a bug, so I have posted it as a bug rather than something 28 posts down what became a very long discussion!

Antony · May 21, 2020, 6:24pm

For clarity!

Teodor · May 21, 2020, 6:24pm

Antony, one topic is enough.
Posting the same thing over and over again makes it harder for us to follow.
It’s us who check if it’s a bug or not.
Keep posting in the same topics in the future. You are not really helping doing this, really

Teodor · May 21, 2020, 6:28pm

Would you mind answering my question:

the result of:

{{lookups.where(lookups.lookup_function, "==", "stripe_fee_category")[0]}}

or

{{lookups.where(lookups.lookup_function, "==", "stripe_fee_category").top(1)}}

?

Antony · May 21, 2020, 6:59pm

@teodor, can you tell me how to show you that?

Teodor · May 21, 2020, 7:02pm

Well add some setValue step with any of these expressions, enable output and just copy the response from your server action in the browser dev tools.

Antony · May 21, 2020, 7:09pm

With this statement in my server action:

I get the following error message as the server action loads:

{code: 0, file: "C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\formatters\collections.php",…}
code: 0
file: "C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\formatters\collections.php"
line: 35
message: "Undefined index: "
trace: "#0 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\formatters\collections.php(35): exception_error_handler(8, 'Undefined index...', 'C:\\Users\\anton\\...', 35, Array)↵#1 [internal function]: lib\core\formatter_where(Array, NULL, '==', 'stripe_fee_cate...')↵#2 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(396): call_user_func_array('\\lib\\core\\forma...', Array)↵#3 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(354): lib\core\Parser->objectMember(Object(Closure))↵#4 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(296): lib\core\Parser->primary()↵#5 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(273): lib\core\Parser->group()↵#6 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(253): lib\core\Parser->unary()↵#7 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(243): lib\core\Parser->multiplicative()↵#8 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(233): lib\core\Parser->addictive()↵#9 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(223): lib\core\Parser->bitwiseShift()↵#10 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(213): lib\core\Parser->relational()↵#11 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(203): lib\core\Parser->equality()↵#12 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(193): lib\core\Parser->bitwiseAnd()↵#13 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(183): lib\core\Parser->bitwiseXor()↵#14 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(173): lib\core\Parser->bitwiseOr()↵#15 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(161): lib\core\Parser->logicalAnd()↵#16 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(145): lib\core\Parser->logicalOr()↵#17 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(141): lib\core\Parser->conditional()↵#18 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\core\Parser.php(86): lib\core\Parser->expression()↵#19 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\App.php(221): lib\core\Parser->parse('lookups.where(l...', NULL)↵#20 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\App.php(206): lib\App->parseObject('{{lookups.where...', NULL)↵#21 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\modules\core.php(99): lib\App->parseObject(Object(stdClass))↵#22 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\App.php(173): modules\core->setvalue(Object(stdClass), 'test1')↵#23 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\App.php(137): lib\App->execSteps(Object(stdClass))↵#24 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\App.php(107): lib\App->execSteps(Array)↵#25 C:\Users\anton\Dropbox\workshop-angel\dmxConnectLib\lib\App.php(72): lib\App->exec(Object(stdClass))↵#26 C:\Users\anton\Dropbox\workshop-angel\dmxConnect\api\subscriber_user_settings\set_session_variables.php(8): lib\App->define(Object(stdClass))↵#27 {main}"

Teodor · May 21, 2020, 7:12pm

And what without the [0] at the end?

Antony · May 21, 2020, 7:25pm

I get the same error.

Teodor · May 21, 2020, 7:27pm

Well then something is totally wrong…
Are you sure {{lookups}} returns anything at all?

JonL · May 21, 2020, 7:31pm

So that’s the problem. You asked for a solution to something that was already broken ergo everything else was bound to be broken

Antony, there is an important lesson to learn here. People don’t ask for more information about your problem just because. They do it based on solid grounds.

Instead of coming with the data structure you are querying and what you need to achieve you came with this works because I say so so how can I do this other thing?

The problem is that the part you assumed was working isn’t.

Antony · May 21, 2020, 7:47pm

five

I can only see this when I disable the Set Value step and just have the Database Query on its own… The Set Value continues to give the error message last shown.

I’ve also tried deleting the Database Query and re-making it, as that can sometimes fix things, but it hasn’t in this case.

Antony · May 21, 2020, 7:49pm

Which is why when realising this I submitted a bug report!

Teodor · May 21, 2020, 7:50pm

That’s not really the reply of the server action.
Run your page and look in the browser dev tools - network - xhr.
I need to see the output there.

JonL · May 21, 2020, 7:50pm

I will leave it rest here…

Antony · May 21, 2020, 7:52pm

But Teodor, what I showed you is the text from there!

Teodor · May 21, 2020, 7:54pm

Antony …
I need to see what your server action returns before you try to use all these setValue or setsession or whatever set steps you are using with some formatters applied to them!

The dmx.app.data screenshot shows me nothing of this.

Antony · May 21, 2020, 7:55pm

So with just the Database Query of the table lookups?