Instrument

class database.models.Instrument(*args, **kwargs)

Bases: database.models.custom_base_model.CustomBaseModel

An instrument or voice

A part is written for an instrument or voice, and a symbolic music file can specify which instrument or voices it contains

name

models.CharField – The name of this Instrument

parts

models.ManyToOneRel – References to Parts that use this Instrument

sym_files

models.ManyToManyRel – References to SymbolicMusicFiles that specify this Instrument

Attributes Summary

id	A wrapper for a deferred-loading field.
musical_works	Get all the MusicalWorks that use this Instrument.
name	A wrapper for a deferred-loading field.
objects
parts	Accessor to the related objects manager on the reverse side of a many-to-one relation.
sections	Get all the Sections that use this Instrument.
sym_files	Accessor to the related objects manager on the forward and reverse sides of a many-to-many relation.

Methods Summary

get_next_by_date_created(*[, field, is_next])
get_next_by_date_updated(*[, field, is_next])
get_previous_by_date_created(*[, field, is_next])
get_previous_by_date_updated(*[, field, is_next])

Attributes Documentation

id

A wrapper for a deferred-loading field. When the value is read from this object the first time, the query is executed.

musical_works

Get all the MusicalWorks that use this Instrument.

name

A wrapper for a deferred-loading field. When the value is read from this object the first time, the query is executed.

objects = <django.db.models.manager.Manager object>

parts

Accessor to the related objects manager on the reverse side of a many-to-one relation.

In the example:

class Child(Model):
    parent = ForeignKey(Parent, related_name='children')

Parent.children is a ReverseManyToOneDescriptor instance.

Most of the implementation is delegated to a dynamically defined manager class built by create_forward_many_to_many_manager() defined below.

sections

Get all the Sections that use this Instrument.

sym_files

Accessor to the related objects manager on the forward and reverse sides of a many-to-many relation.

In the example:

class Pizza(Model):
    toppings = ManyToManyField(Topping, related_name='pizzas')

Pizza.toppings and Topping.pizzas are ManyToManyDescriptor instances.

Most of the implementation is delegated to a dynamically defined manager class built by create_forward_many_to_many_manager() defined below.

Methods Documentation

get_next_by_date_created(*, field=<django.db.models.fields.DateTimeField: date_created>, is_next=True, **kwargs)

get_next_by_date_updated(*, field=<django.db.models.fields.DateTimeField: date_updated>, is_next=True, **kwargs)

get_previous_by_date_created(*, field=<django.db.models.fields.DateTimeField: date_created>, is_next=False, **kwargs)

get_previous_by_date_updated(*, field=<django.db.models.fields.DateTimeField: date_updated>, is_next=False, **kwargs)