SourceInstantiation¶

class database.models.SourceInstantiation(*args, **kwargs)¶

Bases: database.models.custom_base_model.CustomBaseModel

An abstract entity defined by the music specified by a particular Source, which corresponds to a particular instantiation of all or part of a Musical Work, Sections or Parts.

Manifested by Audio, Symbolic, Text or Image files.

source¶: models.ForeignKey – Reference to the Source instantiated by this SourceInstantiation

work¶: models.ForeignKey – Reference to a MusicalWork defined in full by this SourceInstantiation

sections¶: models.ManyToManyField – References to Sections defined in full by this SourceInstantiation

parts¶: models.ManyToManyField – References to Parts defined in full by this SourceInstantiation

manifested_by_audio_files¶: models.ManyToOneRel – References to AudioFiles that manifest this SourceInstantiation

manifested_by_text_files¶: models.ManyToOneRel – References to TextFiles that manifest this SourceInstantiation

manifested_by_image_files¶: models.ManyToOneRel – References to ImageFiles that manifest this SourceInstantiation

manifested_by_sym_files¶: models.ManyToOneRel – References to SymbolicMusicFiles that manifest this SourceInstantiation

Attributes Summary

`id`	A wrapper for a deferred-loading field.
`manifested_by_audio_files`	Accessor to the related objects manager on the reverse side of a many-to-one relation.
`manifested_by_image_files`	Accessor to the related objects manager on the reverse side of a many-to-one relation.
`manifested_by_sym_files`	Accessor to the related objects manager on the reverse side of a many-to-one relation.
`manifested_by_text_files`	Accessor to the related objects manager on the reverse side of a many-to-one relation.
`objects`
`parts`	Accessor to the related objects manager on the forward and reverse sides of a many-to-many relation.
`sections`	Accessor to the related objects manager on the forward and reverse sides of a many-to-many relation.
`source`	Accessor to the related object on the forward side of a many-to-one or one-to-one (via ForwardOneToOneDescriptor subclass) relation.
`source_id`	A wrapper for a deferred-loading field.
`work`	Accessor to the related object on the forward side of a many-to-one or one-to-one (via ForwardOneToOneDescriptor subclass) relation.
`work_id`	A wrapper for a deferred-loading field.

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.

manifested_by_audio_files

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.

manifested_by_image_files

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.

manifested_by_sym_files

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.

manifested_by_text_files

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.

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

parts

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.

sections

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.

source

Accessor to the related object on the forward side of a many-to-one or one-to-one (via ForwardOneToOneDescriptor subclass) relation.

In the example:

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

Child.parent is a ForwardManyToOneDescriptor instance.

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

work

Accessor to the related object on the forward side of a many-to-one or one-to-one (via ForwardOneToOneDescriptor subclass) relation.

In the example:

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

Child.parent is a ForwardManyToOneDescriptor instance.

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

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)¶