There is missing get()
at the end of that query builder, thus you don't run the query at all. That's it.
request in PhpMyAdmin works, with Laravel Query Builder, doesn't seem to work
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12-07-2023 - |
質問
I have a problem that I can't fix :
this request works in PHPMYADMIN
SELECT cronState.name, command.name, parameter.keyword, eventParameterValue.value
FROM cronState, commandInstance, command, eventParameterValue, parameter
WHERE cronState.id = commandInstance.cronState_id
AND commandInstance.command_id = command.id
AND eventParameterValue.commandInstance_id = commandInstance.id
AND eventParameterValue.parameter_id = parameter.id
AND cronState.id =32
it returns :
name name keyword value
on20 DigitalPinSet State 1
on20 PwmPinSet DutyCycle 20
and it's ALL I want.
LITTLE EDIT : I use an AJAX Request(with a state_name) to this method which should returns the query result.
Now, when I try to implement it with the Laravel Query Builder, it returns some errors.
My code:
$cronState_id = DB::table('cronState')
->where('name', Input::get('state_name'))
->first();
$cronEvent = DB::table('cronState')
->join('commandInstance', 'commandInstance.cronState_id', '=', 'cronState.id')
->join('command', 'commandInstance.command_id', '=', 'command.id')
->join('eventParameterValue', 'eventParameterValue.commandInstance_id', '=', 'commandInstance.id')
->join('eventParameterValue', 'eventParameterValue.parameter_id', '=', 'parameter.id')
->where('cronState.id', '=', $cronState_id->id)
->select('cronState.name', 'command.name', 'parameter.keyword', 'eventParameterValue.value');
foreach($cronEvent as $result){
$ev = $result['keyword'];
}
return $ev;
The error for this code :
{"error":{"type":"ErrorException","message":"Undefined index: keyword","file":"/var/www/stage/app/controllers/EventController.php","line":48}}
if I change
foreach($cronEvent as $result){
$ev = $result['keyword'];
}
return $ev;
to
return $cronEvent;
(just delete the foreach loop and rename the returning variable), I have this error :
{"error":{"type":"ErrorException","message":"Object of class Illuminate\Database\Query\Builder could not be converted to string","file":"/var/www/stage/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Response.php","line":361}}
So, how can access to my data in the object ? Maybe my Query Builder implementation doesn't works...
Thanks for any help !
解決