# addons.DeletedPreviewFile

## Model Info

| Key | Value |
|---|-----|
| Model Name | DeletedPreviewFile |
| Verbose Name | deleted preview file |
| Verbose Name Plural | deleted preview files |
| Docstring | <p>Model holding the backup name for a Preview whose file was deleted from<br>disk following a force-disable of the corresponding Addon.</p><p>Used with DisabledAddonContent</p> |
| Is Abstract | False |
| Is Proxy | False |
| Is Managed | True |
| Ordering | [] |
| Permissions | [] |
| Default Permissions | ('add', 'change', 'delete', 'view') |
| Indexes | [] |
| Constraints | [] |
| Database Table | addons_deletedpreviewfile |
| Base Manager | objects |
| Default Manager | None |
| File | /data/olympia/src/olympia/addons/models.py |
| Starting Line Number | 2666 |
| Method Resolution Order | (<class 'olympia.addons.models.DeletedPreviewFile'>, <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 |
|----------|----------|---------------|-------------|------------|
| `backup_name` | CharField | backup_name | varchar(75) | backup name |
| `created` | DateTimeField | created | datetime(6) | created |
| `disabled_addon_content` | ForeignKey | disabled_addon_content_id | integer UNSIGNED | disabled addon content |
| `id (pk)` | AutoField | id | integer AUTO_INCREMENT | ID |
| `modified` | DateTimeField | modified | datetime(6) | modified |
| `preview` | ForeignKey | preview_id | integer UNSIGNED | preview |

## Relations

| Field Name | Field Type | Database Column | Database Type | Related Model | Related Name |
|----------|----------|---------------|-------------|-------------|------------|
| `disabled_addon_content` | ForeignKey | disabled_addon_content_id | integer UNSIGNED | addons.DisabledAddonContent | deletedpreviewfile_set |
| `preview` | ForeignKey | preview_id | integer UNSIGNED | addons.Preview | deletedpreviewfile_set |

fields_reverse_relation=[]

## Methods

### Other Methods

| Method Name | Signature |
|-----------|---------|
| `get_admin_absolute_url` | `(self)` |
| `get_admin_url_path` | `(self)` |
| `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)` |


## 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)`


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