An error occurred while creating the graph; GraphViz returned: Error: <stdin>: syntax error in line 1213 near '->'

[ahren-condos-ca]

php artisan generate:erd -vvv
Found 148 models.
Inspecting model relations.
148/148 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100% 51 mins/51 mins 1.9 GiB
In Graph.php line 375:

[phpDocumentor\GraphViz\Exception]
An error occurred while creating the graph; GraphViz returned: Error: : syntax error in line 1213 near '->'

Exception trace:
() at /var/www/api/vendor/phpdocumentor/graphviz/src/phpDocumentor/GraphViz/Graph.php:384
phpDocumentor\GraphViz\Graph->export() at /var/www/api/vendor/beyondcode/laravel-er-diagram-generator/src/GenerateDiagramCommand.php:77
BeyondCode\ErdGenerator\GenerateDiagramCommand->handle() at n/a:n/a
call_user_func_array() at /var/www/api/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:29
Illuminate\Container\BoundMethod::Illuminate\Container{closure}() at /var/www/api/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:87
Illuminate\Container\BoundMethod::callBoundMethod() at /var/www/api/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:31
Illuminate\Container\BoundMethod::call() at /var/www/api/vendor/laravel/framework/src/Illuminate/Container/Container.php:564
Illuminate\Container\Container->call() at /var/www/api/vendor/laravel/framework/src/Illuminate/Console/Command.php:179
Illuminate\Console\Command->execute() at /var/www/api/vendor/symfony/console/Command/Command.php:255
Symfony\Component\Console\Command\Command->run() at /var/www/api/vendor/laravel/framework/src/Illuminate/Console/Command.php:166

[ahren-condos-ca]

Also, if I try run php artisan generate:erd erd-test.txt --format=text -vvv it works.

Further tried removing large models just to try get it working. Completes byt throws this error:
127/127 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100% 1 min/1 min 144.2 MiB"App\ViewingRequest"
PHP Fatal error: Method BeyondCode\ErdGenerator\Edge::__toString() must not throw an exception, caught ErrorException: Object of class Illuminate\Database\Eloquent\Relations\MorphTo could not be converted to string in /var/www/api/vendor/phpdocumentor/graphviz/src/phpDocumentor/GraphViz/Graph.php on line 0

[jafar690]

@ahren-condos-ca have you installed the graphviz package ?

[ahren-condos-ca]

Yup. If I use the config file to limit my project to only a few models, it then works. However there are few models that when included cause the above error. Most importantly this happens for my User Model which is a big issue.

Still stuck on the above error pertaining to Morphable model relationships (Photos) and dont know what to look for next.

On a side note: One of the issues i have been able to work around is the use of https://github.com/jenssegers/laravel-mongodb (adds MongoDB support for some models) which was throwing errors due too it not having implemented a needed function which i inserted a try - catch in this repo's code and just use the default table_name.field_name pattern.

[ahren-condos-ca]

So I've further been able to troubleshoot but it appears that the library doesn't support Morphable models, which like in my Photo Model case, contains fields model_type and model_id columns. The class then has a function

    public function model()
    {
        return $this->morphTo();
    }

This class then throws an Exception Object of class Illuminate\Database\Eloquent\Relations\MorphTo could not be converted to string on
./vendor/beyondcode/laravel-er-diagram-generator/src/Edge.php:55

From what I can tell this simply doesn't not handle the morthTo() case since fromPort and toPort don't seem to have values.

wrapping lines 54 in your Edge.php class with a try catch I was able to prevent the crash.
Not sure if you can figure a better solution but for now this works fo me

try{
    $from_name .= (!empty($this->fromPort)) ? ':' . $this->fromPort : '';
    $to_name .= (!empty($this->toPort)) ? ':' . $this->toPort : '';
} catch (\Exception $e) {return '';}

[ahren-condos-ca]

seems to have been fixed in latest version with Pivot and morphable mapping improvements