addons.Preview

Model Info

Key

Value

Model Name

Preview

Verbose Name

preview

Verbose Name Plural

previews

Docstring

Preview(created, modified, id, addon, caption, position, sizes)

Is Abstract

False

Is Proxy

False

Is Managed

True

Ordering

(‘position’, ‘created’)

Permissions

[]

Default Permissions

(‘add’, ‘change’, ‘delete’, ‘view’)

Indexes

[<Index: fields=[‘addon’] name=’previews_addon_idx’>, <Index: fields=[‘addon’, ‘position’, ‘created’] name=’addon_position_created_idx’>]

Constraints

[]

Database Table

previews

Base Manager

None

Default Manager

None

File

/data/olympia/src/olympia/addons/models.py

Starting Line Number

2417

Method Resolution Order

(<class ‘olympia.addons.models.Preview’>, <class ‘olympia.amo.models.BasePreview’>, <class ‘olympia.amo.models.ModelBase’>, <class ‘olympia.amo.models.SaveUpdateMixin’>, <class ‘django.db.models.base.Model’>, <class ‘django.db.models.utils.AltersData’>, <class ‘object’>)

Fields

Field Name

Field Type

Database Column

Database Type

Verbose Name

addon

ForeignKey

addon_id

integer UNSIGNED

addon

caption

TranslatedField

caption

integer UNSIGNED

caption

created

DateTimeField

created

datetime(6)

created

deletedpreviewfile

ManyToOneRel

integer UNSIGNED

id (pk)

PositiveAutoField

id

integer UNSIGNED AUTO_INCREMENT

id

modified

DateTimeField

modified

datetime(6)

modified

position

IntegerField

position

integer

position

sizes

JSONField

sizes

json

sizes

Relations

Field Name

Field Type

Database Column

Database Type

Related Model

Related Name

addon

ForeignKey

addon_id

integer UNSIGNED

addons.Addon

previews

caption

TranslatedField

caption

integer UNSIGNED

translations.Translation

Preview_caption_set+

fields_reverse_relation=[FieldReverseRelation(name=’preview_set’, field_type=’ManyToOneRel’, field_db_type=’integer UNSIGNED’, related_model=’addons.DeletedPreviewFile’, field_name_on_related_model=’preview’, field_type_on_related_model=’ForeignKey’)]

Reverse Relations

Field Name

Field Type

Database Type

Related Model

Field Name on Related Model

Field Type on Related Model

preview_set

ManyToOneRel

integer UNSIGNED

addons.DeletedPreviewFile

preview

ForeignKey

Methods

Other Methods

Method Name

Signature

delete_preview_files

(sender, instance, **kw)

get_admin_absolute_url

(self)

get_admin_url_path

(self)

get_format

(self, for_size)

get_next_by_created

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

get_next_by_modified

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

get_previous_by_created

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

get_previous_by_modified

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

get_unfiltered_manager

()

reload

(self)

serializable_reference

(self)

update

(self, **kw)

Private Methods

Method Name

Signature

_get_field_value_map

(self, meta, exclude=None)

_image_path

(self, folder, file_ext)

_image_url

(self, folder, file_ext)

Custom Managers

default

Class: ManagerBase

*Base for all managers in AMO.

Returns BaseQuerySets.

If a model has translated fields, they’ll be attached through a transform function.*

Custom Methods

transform(self, fn)

Custom QuerySet

Class: BaseQuerySet

Represent a lazy database lookup for a set of objects.

Custom Methods
no_transforms(self)
only_translations(self)

Remove all transforms except translations.

optimized_count(self)

*Slightly optimized count() for cases where there is a DISTINCT in the queryset.

When a count() call is made on a queryset that has a distinct, that causes django to run the full SELECT (including all fields, distinct, ordering etc) in a subquery and then COUNT() on the result of that subquery, which is costly/innefficient. That’s tracked in https://code.djangoproject.com/ticket/30685. We can’t easily fix the fact that there is a subquery, but we can avoid selecting all fields and ordering in that subquery needlessly.*

pop_transforms(self)
transform(self, fn)

objects

Class: ManagerBase

*Base for all managers in AMO.

Returns BaseQuerySets.

If a model has translated fields, they’ll be attached through a transform function.*

Custom Methods

transform(self, fn)

Custom QuerySet

Class: BaseQuerySet

Represent a lazy database lookup for a set of objects.

Custom Methods
no_transforms(self)
only_translations(self)

Remove all transforms except translations.

optimized_count(self)

*Slightly optimized count() for cases where there is a DISTINCT in the queryset.

When a count() call is made on a queryset that has a distinct, that causes django to run the full SELECT (including all fields, distinct, ordering etc) in a subquery and then COUNT() on the result of that subquery, which is costly/innefficient. That’s tracked in https://code.djangoproject.com/ticket/30685. We can’t easily fix the fact that there is a subquery, but we can avoid selecting all fields and ordering in that subquery needlessly.*

pop_transforms(self)
transform(self, fn)

!!! THIS DOCUMENT WAS AUTOGENERATED ON 2025-07-09 !!!