... from the database. You can customize the behavior of this fetching with a fetch mode , making it more efficient or even blocking it. Use QuerySet.fetch_mode() to set the fetch mode for model instances fetche ... d by a QuerySet : from django.db import models books = Book . objects . fetch_mode ( models . FETCH_PEERS ) Fetch modes apply to: ForeignKey fields OneToOneField field ... lds deferred with QuerySet.defer() or QuerySet.only() ジェネリックリレーション（汎用リレーション） Django copies the fetch mode of an instance to any related objects it fetches, so the mode applies to a whole tree of relationships, not just the top-l ... ... from the database. You can customize the behavior of this fetching with a fetch mode , making it more efficient or even blocking it. Use QuerySet.fetch_mode() to set the fetch mode for model instances fetche ... d by a QuerySet : from django.db import models books = Book . objects . fetch_mode ( models . FETCH_PEERS ) Fetch modes apply to: ForeignKey fields OneToOneField field ... lds deferred with QuerySet.defer() or QuerySet.only() ジェネリックリレーション（汎用リレーション） Django copies the fetch mode of an instance to any related objects it fetches, so the mode applies to a whole tree of relationships, not just the top-l ... ... インスタンスです。 FileSystemStorage クラス ¶ class FileSystemStorage ( location = None , base_url = None , file_permissions_mode = None , directory_permissions_mode = None , allow_overwrite = False ) [ソース] ¶ FileSystemStorage クラスは、ローカルファ ... se_url [ソース] ¶ この場所に保存されているファイルが提供される URL。デフォルトは MEDIA_URL 設定の値です。 file_permissions_mode [ソース] ¶ 保存される際にファイルが受け取るファイルシステムの権限。デフォルトは FILE_UPLOAD_PERMISSIONS です。 directory_p ... ermissions_mode [ソース] ¶ 保存された際にそのディレクトリが受け取るファイルシステムの権限。デフォルトは FILE_UPLOAD_DIRECTORY_PERMISSIONS ... ... インスタンスです。 FileSystemStorage クラス ¶ class FileSystemStorage ( location = None , base_url = None , file_permissions_mode = None , directory_permissions_mode = None , allow_overwrite = False ) [ソース] ¶ FileSystemStorage クラスは、ローカルファ ... se_url [ソース] ¶ この場所に保存されているファイルが提供される URL。デフォルトは MEDIA_URL 設定の値です。 file_permissions_mode [ソース] ¶ 保存される際にファイルが受け取るファイルシステムの権限。デフォルトは FILE_UPLOAD_PERMISSIONS です。 directory_p ... ermissions_mode [ソース] ¶ 保存された際にそのディレクトリが受け取るファイルシステムの権限。デフォルトは FILE_UPLOAD_DIRECTORY_PERMISSIONS ... ... ブジェクトを作成する ¶ モデルの新しいインスタンスを作成するには、他の Python クラスと同様にインスタンス化してください: class Model ( ** kwargs ) [ソース] ¶ The keyword arguments are the names of the fields you've defined on your model. Note that instan ... tiating a model in no way touches your database; for that, you need to save() . 注釈 You may be tempted to customize the model by overrid ... ng the __init__ method. If you do so, however, take care not to change the calling signature as any change may prevent the model instance from being saved. Additionally, referring to model fields within __init__ may potentially result in infinite rec ... ... ブジェクトを作成する ¶ モデルの新しいインスタンスを作成するには、他の Python クラスと同様にインスタンス化してください: class Model ( ** kwargs ) [ソース] ¶ The keyword arguments are the names of the fields you've defined on your model. Note that instan ... tiating a model in no way touches your database; for that, you need to save() . 注釈 You may be tempted to customize the model by overrid ... ng the __init__ method. If you do so, however, take care not to change the calling signature as any change may prevent the model instance from being saved. Additionally, referring to model fields within __init__ may potentially result in infinite rec ... ... and 3.14. We highly recommend , and only officially support, the latest release of each series. What's new in Django 6.1 ¶ Model field fetch modes ¶ The on-demand fetching behavior of model fields is now configurable with fetch modes . These modes al ... you to control how Django fetches data from the database when an unfetched field is accessed. Django provides three fetch modes: FETCH_ONE , the default, fetches the missing field for the current instance only. This mode represents Django's existing ... behavior. FETCH_PEERS fetches a missing field for all instances that came from the same QuerySet . This mode works like an on-demand prefetch_related() . It can reduce most cases of the "N+1 queries problem" to two queries without ... ... ceptable for content like images, maps, videos, and data tables, which require both dimensions to be usable. Forced-colors mode (for example Windows Contrast Themes). Note that this can be tested via the "high_contrast" mode in the screenshot tests . ... Common issues include: Over-reliance on color for meaning, which is lost in forced-colors mode. Use of !important or inline styles may break forced-colors mode. Recommended assistive technologies ¶ Where the UI change ... ccessibility Accessibility issues Windows assistive technologies input level guidelines testing Common interactive element mode recommended standards targets work Content also make team focus colors macOS クイック検索 Last update: 2026年10月09日 « pr ... ... and 3.14. We highly recommend , and only officially support, the latest release of each series. What's new in Django 6.1 ¶ Model field fetch modes ¶ The on-demand fetching behavior of model fields is now configurable with fetch modes . These modes al ... you to control how Django fetches data from the database when an unfetched field is accessed. Django provides three fetch modes: FETCH_ONE , the default, fetches the missing field for the current instance only. This mode represents Django's existing ... behavior. FETCH_PEERS fetches a missing field for all instances that came from the same QuerySet . This mode works like an on-demand prefetch_related() . It can reduce most cases of the "N+1 queries problem" to two queries without ... ... enever possible, use the attributes and methods of the subclass itself rather than those of the subclass's file attribute. mode ¶ ファイルの読み込み/書き込みのモードです。 open ( mode = None , * args , ** kwargs ) [ソース] ¶ Open or reopen the file ( ... which also does File.seek(0) ). The mode argument allows the same values as Python's built-in open() . *args and **kwargs are passed after mode to Python's built-i ... n open() . ファイルを再オープンする際、 mode はファイルが元々開かれていたモードを上書きします。 None はオリジナルのモードで再オープンすることを意味します。 コンテキスト ... 2026年10月08日