投稿時間:2022-04-15 14:18:49 RSSフィード2022-04-15 14:00 分まとめ(24件)

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IT	ITmedia 総合記事一覧	[ITmedia ビジネスオンライン] 「現時点で来シーズンの放映権を保有していない」　DAZN、イングランド・プレミアリーグの放映権で公式声明	https://www.itmedia.co.jp/business/articles/2204/15/news112.html	ITmediaビジネスオンライン「現時点で来シーズンの放映権を保有していない」DAZN、イングランド・プレミアリーグの放映権で公式声明イングランド・プレミアリーグEPLのシーズン以降の放映権を巡り、韓国企業が運営する動画配信サービスが日本での放映権を獲得したとする一部報道に関して、「DAZN」を運営するDAZNJapanInvestment東京都港区が「現時点においては来シーズンの放映権を保有していない」とするコメントを発表した。	2022-04-15 13:50:00
IT	ITmedia 総合記事一覧	[ITmedia News] スマホゲー「イケメン戦国」に不正アクセスか　障害発生からすでに1週間経過　復旧のめど立たず	https://www.itmedia.co.jp/news/articles/2204/15/news114.html	android	2022-04-15 13:40:00
IT	ITmedia 総合記事一覧	[ITmedia ビジネスオンライン] イーロン・マスク氏、米ツイッターの筆頭株主ではなかった　米WSJの報道が話題	https://www.itmedia.co.jp/business/articles/2204/15/news093.html	itmedia	2022-04-15 13:32:00
IT	ITmedia 総合記事一覧	[ITmedia PC USER] 「Windows 11 Home」をおトクに「Windows 11 Pro」へアップグレードする方法	https://www.itmedia.co.jp/pcuser/articles/2204/15/news107.html	ITmediaPCUSER「WindowsHome」をおトクに「WindowsPro」へアップグレードする方法家電量販店で販売されているWindowsPCのほとんどは「WindowsHome」をプリインストールしている。	2022-04-15 13:30:00
IT	ITmedia 総合記事一覧	[ITmedia Mobile] iOS 11の一部iPhoneで4G使用不可に　ソフトバンクとY!mobileがアップデートを呼びかけ	https://www.itmedia.co.jp/mobile/articles/2204/15/news102.html	ITmediaMobileiOSの一部iPhoneでG使用不可にソフトバンクとYmobileがアップデートを呼びかけiOSを搭載した一部のiPhoneと一部エリアでG回線が使えなくなるとして、ソフトバンクとYmobileが各ユーザーに注意を呼びかけている。	2022-04-15 13:30:00
IT	ITmedia 総合記事一覧	[ITmedia News] 「QRコード」は日本の発明品って知ってた？　4月18日「発明の日」に先立ち、特許庁が紹介	https://www.itmedia.co.jp/news/articles/2204/15/news111.html	itmedia	2022-04-15 13:26:00
IT	ITmedia 総合記事一覧	[ITmedia News] どっちがお得？　早く会社に行けるのはどっち？　シェアサイクルを乗り比べてみた	https://www.itmedia.co.jp/news/articles/2204/15/news108.html	自転車通勤	2022-04-15 13:25:00
IT	ITmedia 総合記事一覧	[ITmedia News] 「Axie Infinity」のチェーンから6億ドル超を盗んだのは北朝鮮のLazarus──FBI	https://www.itmedia.co.jp/news/articles/2204/15/news110.html	axieinfinity	2022-04-15 13:19:00
IT	ITmedia 総合記事一覧	[ITmedia PC USER] ASUS、音に合わせた発光も可能な“AniMe Matrix”を搭載したDAC搭載USBゲーミングヘッドセット	https://www.itmedia.co.jp/pcuser/articles/2204/15/news109.html	animematrix	2022-04-15 13:15:00
TECH	Techable（テッカブル）	博報堂がデザイン協力。満月参りの4月17日に三重県・竹神社で御朱印NFT配布	https://techable.jp/archives/177103	cryptogames	2022-04-15 04:00:32
IT	情報システムリーダーのためのIT情報専門サイト IT Leaders	日本取引所グループ、ブロックチェーンを使った環境債を発行、日立などと協業 | IT Leaders	https://it.impress.co.jp/articles/-/23026	日本取引所グループ、ブロックチェーンを使った環境債を発行、日立などと協業ITLeaders日本取引所グループは年月日、ブロックチェーンを使った環境債を発行し、資金を調達すると発表した。	2022-04-15 13:47:00
Ruby	Rubyタグが付けられた新着投稿 - Qiita	[個人開発]実際に飲食店で使う予約サービスを実務未経験者が１から考え作ってみた。	https://qiita.com/TakeKata/items/30c04773ed328f03bd98	予約サービス	2022-04-15 13:41:57
Ruby	Railsタグが付けられた新着投稿 - Qiita	[個人開発]実際に飲食店で使う予約サービスを実務未経験者が１から考え作ってみた。	https://qiita.com/TakeKata/items/30c04773ed328f03bd98	予約サービス	2022-04-15 13:41:57
海外TECH	DEV Community	Django Models: Basics and Best Practices	https://dev.to/pragativerma18/django-models-basics-and-best-practices-49e4	Django Models Basics and Best PracticesModels are the foundation of any Django project Django web applications use models to access and manage data from the database But rushing to write models without devoting time to think about the important design decisions can hurt after months or years to come In this article we ll be learning about the basics of Django models and also the best practices to make the most out of them Prerequisites This article requires prior knowledge of the Django web framework and is meant for developers with beginner knowledge What are Django Models A model is a class that represents a table or a collection in our database with each attribute representing a table or a collection field Models are defined inside a Django app in a models py file Models determine the structure of stored data including field types and optionally their maximum size default values selection list options documentation help text form label text and so on The model is defined independently of the underlying database You don t need to talk to the database directly once you ve decided which one to use ーall you have to do now is write your model structure and other code and Django will handle the job of talking to the database for you How to Create a Model Before diving in and starting to code the models take a few minutes to consider what data you need to store and the relationships between the various objects Here is the basic Django syntax to define a model from django db import modelsclass Demo models Model email models CharField max length user name models CharField max length phone number models IntegerField class Meta db table demo Every model inherits from django db and the Meta class s db table field allows us to specify the database s actual table or collection name After you have defined your model you will need to run the following command to tell Django to generate the table in the actual database python manage py makemigrationspython manage py migrateRead more about Django Models in the official Django Documentation Best Practices for Django Models Here are some of the best practices to keep in mind while designing your models Keep no more than models per Django app The more models in an app the messier the code is bound to get Django has defined a standard coding style to keep in mind while writing your models It recommends the following ordering of the model fields choicesdatabase fieldscustom manager attributesMetadef str def save def get absolute url custom methodsAlways use singular nouns for model naming for example User Post Article and so on as a model defines the properties of an object Avoid using multi table inheritance since it causes a lot of confusion and adds a lot of overhead Use explicit OneToOneFields and ForeignKeys between models instead of multi table inheritance to regulate when joins are traversed Use a OneToOneField instead of using ForeignKey with unique True For BooleanField do not use null True or blank True It s also worth noting that it s preferable to set default values for such fields Use NullBooleanField if required in case you realize that the field can remain empty Using model help text in fields as a part of the documentation to help other developers understand more about the data structure Use Abstract Base Class when you want to put some common information into many other models It is very simple write in your base class and put abstract True in the Meta Class Use str method in the non abstract models to return a distinguishable name for your Django models Create a TimeStampedModel for your Django project where you require to include a created and modified timestamp field on almost all of your models It could look something like this from django db import modelsclass TimeStampedModel models Model An abstract base class model that provides self updating created and modified fields created at models DateTimeField auto now add True modified at models DateTimeField auto now True class Meta abstract TrueDon t use null True and blank True if you don t need them Their use cases can often be confusing Consider the following null True allows the column to keep a null value blank True is used only in Forms for validation and is not related to the database However for TextField it s always safe to define a default value such as an empty string Well there could be cases where a careful design won t be enough you ll have to take precautions while deployment and management of Django migrations that help you manage your models and the underlying database Below are some of the points to keep in mind when you re moving ahead with migrating the models Always back up the existing data before running a migration Also if huge data is at risk think thousands of rows in a table make sure to run extensive tests on a staging server before taking it live on the production server Always put your migration file in version control It is an absolute necessity to enable code collaboration and consistency during development Try to avoid generic relations and GenericForeignKey as they could cause a reduction in the speed of queries due to a lack of indexing between models Moreover there are chances of data corruption as a table can refer to another against a non existent record ConclusionModels are the foundation of any Django project and thus they should be designed and deployed after careful thinking In this article we have learned what are models in Django how to create them and the best practices to keep in mind to prevent future bottlenecks and build an efficient application That s all for this article In case you want to connect with me follow the links below LinkedIn GitHub Twitter Medium	2022-04-15 04:22:46
医療系	医療介護 CBnews	ギャンブル等依存症、専門医療機関が施設など支援-鹿児島県が対策推進計画を公表	https://www.cbnews.jp/news/entry/20220415133322	依存症専門医療機関	2022-04-15 13:40:00
金融	ニッセイ基礎研究所	人流抑制で落ち込むサービス消費－繰り返される行動制限への疑問	https://www.nli-research.co.jp/topics_detail1/id=70887?site=nli	そこで、年以降の期間年月、月、年月について、緊急事態宣言及びまん延防止等重点措置の対象地域と対象外地域の人流データを比較した図表ー。	2022-04-15 13:47:37
海外ニュース	Japan Times latest articles	Tokyo beefs up intelligence-gathering after Russian subs test-fire cruise missiles in Sea of Japan	https://www.japantimes.co.jp/news/2022/04/15/national/russia-missile-test-sea-of-japan/	Tokyo beefs up intelligence gathering after Russian subs test fire cruise missiles in Sea of JapanThe Russian submarines launched the advanced Kalibr cruise missiles ーthe same weapons used in Ukraine ーfrom submerged positions successfully hitting a target representing	2022-04-15 13:10:20
ニュース	BBC News - Home	Operation Brock: M20 traffic controls scaled back ahead of Easter	https://www.bbc.co.uk/news/uk-england-kent-61113985?at_medium=RSS&at_campaign=KARANGA	highways	2022-04-15 04:01:22
ニュース	BBC News - Home	The Papers: Migrant plan 'inhumane' and Sussexes visit Queen	https://www.bbc.co.uk/news/blogs-the-papers-61114859?at_medium=RSS&at_campaign=KARANGA	asylum	2022-04-15 04:22:35
ビジネス	ダイヤモンド・オンライン - 新着記事	反ロシア連合に参加しない途上国の思惑 - WSJ発	https://diamond.jp/articles/-/301735	反ロシア	2022-04-15 13:23:00
ビジネス	ダイヤモンド・オンライン - 新着記事	マスク氏買収案、ツイッター取締役会に逃げ道 - WSJ発	https://diamond.jp/articles/-/301736	取締役会	2022-04-15 13:02:00
IT	週刊アスキー	ソフトバンク・郡山市・プラットふくしま、AIやロボットを活用した教育について連携開始	https://weekly.ascii.jp/elem/000/004/089/4089372/	一般社団法人	2022-04-15 13:10:00
IT	週刊アスキー	楽天モバイルと宮城県、大規模災害に備えた「災害時における通信設備復旧等の協力に関する協定」を締結	https://weekly.ascii.jp/elem/000/004/089/4089377/	楽天モバイル	2022-04-15 13:10:00
マーケティング	AdverTimes	洗濯機と連動して洗剤を自動注文　東芝LS、家電制御アプリ	https://www.advertimes.com/20220415/article381812/	家電量販店	2022-04-15 04:31:24