how to find parameter of member of a list based on other parameter

I’m getting a list with the below fields: connectionInfoList.Add(new ConnectionInfo { DeviceId = deviceId, ConnectionStatus = connectionStatus, ConnectionType = connectionType, ConnectionRole = connectionRole }); I need a way to get the DeviceId of the member that connectionType==”HFP” List<ConnectionInfo> connectionInfoList = btoe.Bluetooth.GetConnectedAssociationInfo(); var deviceId = from connectionInfo in connectionInfoList where connectionInfoList.Any(ConnectionType == “HFP” select connectionInfo.DeviceId); I’m…

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How to get data from database based on Many to many relation in Laravel Eloquent ORM

I have two models: class Musician extends Model { public function instruments() { return $this->belongsToMany(‘App\Instrument’, ‘musicians_instruments’); } } and class Instrument extends Model { public function musicians() { return $this->belongsToMany(‘App\Musician’, ‘musicians_instruments’); } } Saving to database works OK, like I want to. I have 3 tables in database: musicians instruments musicians_instruments (pivot table) instruments –…

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Django GenericForeignKey being deleted when it shouldn’t

I’m having a problem where if I delete an object, another object is being deleted seemingly wrongly. models.py class Document(models.model): file = models.FileField(upload_to=document_path, null=True, max_length=256) ri_ct = models.ForeignKey( ContentType, null=True, editable=False, related_name=’documents_related_item’, on_delete=models.PROTECT ) ri_id = models.PositiveIntegerField(null=True, editable=False, db_index=True) related_item = GenericForeignKey(‘ri_ct’, ‘ri_id’) class Invoice(models.model): documents = GenericRelation( Document, related_query_name=’invoices’, content_type_field=’ri_ct’, object_id_field=’ri_id’ ) class BalanceUpdate(models.model):…

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