Using Customization handler to insert app-generated ID

[apps-caraga]

I was just trying to use Universally Unique Lexicographically Sortable Identifier ULID with this library and was able to insert the ULID via the multitenancy middleware as follows:

	'multiTenancy.handler' => function ($operation, $tableName) {
			if($operation =='create' && $tableName=='data'){ 
				return['id'=>Ulid::generate()];
			}
		},

With SQLite, the post request is ok (data is saved and response status is HTTP 200) but returns {} or an empty array. Any idea why?

SQLite table schema:

CREATE TABLE data (
    id        TEXT (26) PRIMARY KEY
                        NOT NULL,
    content      TEXT,
    createdAt DATETIME  NOT NULL
                        DEFAULT (strftime('%Y-%m-%d %H:%M:%fZ') ) 
);

[mevdschee]

With SQLite, the post request is ok (data is saved and response status is HTTP 200) but returns {} or an empty array. Any idea why?

I think it is because the code returns the insert(ed) id and not the primary key.

[apps-caraga]

So it doesn't matter if the inserted ULID is the primary key. Anyway, is multitenancy the correct way to do this or is there a better way? (aside from client-side ID generation) 😁 I also tried using customization.beforeHandler and it got the same result

[apps-caraga]

So i got it to return the new ULID by adding it in the afterHandler.

	'customization.beforeHandler' => function ($operation, $tableName, $request, $environment) {
			if($operation =='create' && $tableName =='data'){
				$body = $request->getParsedBody();
				$body->id = $environment->ulid = Ulid::generate();
				return $request->withParsedBody($body);
			}
		},
		'customization.afterHandler' => function ($operation, $tableName, $response, $environment) {
			if($operation =='create' && $tableName =='data'){
				return ResponseFactory::from(200, 'text/plain',$environment->ulid);
			}
		},	

It's not very good-looking code but it kinda works for my use case. (Although I'm not sure if this is a correct way to use the $environment variable.)😁

[mevdschee]

Excellent, that is exactly how that I envisioned that it would be used! Keep it up..

[apps-caraga]

Just noting here that the before/afterHandler does not work with user registration even though it's a POST request.

[mevdschee]

@apps-caraga I would say that depends on the order of the middlewares.

[apps-caraga]

depends on the order of the middlewares.

But it seems that no matter how I order the middlewares, the ULID is not inserted via the customization beforeHandler during dbAuth registration request.

[mevdschee]

Did you load the Customization handler before DbAuth? You test for 'create' operation, while the DbAuth uses the 'unknown' if I read the code correctly. Did you debug the code? You should be able to do something when calling Customization before DbAuth.

[apps-caraga]

You should be able to do something when calling Customization before DbAuth.

I was able to retrieve the path segment thru RequestUtils::getPathSegment($request, 1); parameters so I can check if the current path or operation is 'login','register', or 'logout' operation instead of just checking if the operation is 'unknown'. Then I was able to add the new ID to the $body.

'customization.beforeHandler' => function ($operation, $tableName, $request, $environment) {
			$body = $request->getParsedBody();
			$path = RequestUtils::getPathSegment($request, 1);
			if($path === 'register'  ){
				$body->id = $environment->ulid =   Ulid::generate()->__toString();
				$environment->currPath = $path;
				return $request->withParsedBody($body);
			}
		},

The problem is the dbAuth register processes only the $username and $password so the custom ID added to the body is ignored (line 60-61 of DbAuth middleware ) 😉

[mevdschee]

I think it cannot be done without modifying the dbAuth middleware

[apps-caraga]

Yup,that's the case.But it may not be a very common use case as of now. For now, I'll just copy some code in the register endpoint and insert it in my beforeHandler as a temp. workaround😁

For future, this feature might good to be implemented in an enhanced dbAuth middleware that can accept extra registration data.