14 Scopes Scoping allows you to specify commonly-used queries which can be referenced as method calls on the association objects or models. class User < ActiveRecord::Base scope :active, -> { where(status: 'active') } end
![[Rails][Model] default_scope / scope - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/55431e23349572c0c0280f660051f60a25f36a4c/height=288;version=1;width=512/https%3A%2F%2Ffanyv88.com%3A443%2Fhttps%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-9f5428127621718a910c8b63951390ad.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTkxNiZoPTMzNiZ0eHQ9JTVCUmFpbHMlNUQlNUJNb2RlbCU1RCUyMGRlZmF1bHRfc2NvcGUlMjAlMkYlMjBzY29wZSZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTU2JnR4dC1jbGlwPWVsbGlwc2lzJnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9Nzc1OTllZDZiYzZiOGNhY2VkNWMxYjg3ODQxOTBhMDE%26mark-x%3D142%26mark-y%3D112%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTYxNiZ0eHQ9JTQweXVpLWtuayZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9NTdkZTdiYjI0Y2RjMjY0ZTVjMjhiMDBmZTM3YTk5MmY%26blend-x%3D142%26blend-y%3D491%26blend-mode%3Dnormal%26s%3D825f6b3e4857e0241ee45be68a6a71bd)
14 Scopes Scoping allows you to specify commonly-used queries which can be referenced as method calls on the association objects or models. class User < ActiveRecord::Base scope :active, -> { where(status: 'active') } end
5 Conditional Validation Sometimes it will make sense to validate an object only when a given predicate is satisfied. You can do that by using the :if and :unless options, which can take a symbol, a string, a Proc or an Array. You may use the :if option when you want to specify when the validation should happen. If you want to specify when the validation should not happen, then you may use the :un
![[Rails][Model] validate :if options - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/6e1c54875ccc5439eb8d4134587f8867e04f5f0f/height=288;version=1;width=512/https%3A%2F%2Ffanyv88.com%3A443%2Fhttps%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-9f5428127621718a910c8b63951390ad.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTkxNiZoPTMzNiZ0eHQ9JTVCUmFpbHMlNUQlNUJNb2RlbCU1RCUyMHZhbGlkYXRlJTIwJTNBaWYlMjBvcHRpb25zJnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9NTYmdHh0LWNsaXA9ZWxsaXBzaXMmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz1jNjI1NjUxZDEyYWFhMDg0OTFjNjFhMjgwNTU1OTlkYg%26mark-x%3D142%26mark-y%3D112%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTYxNiZ0eHQ9JTQweXVpLWtuayZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9NTdkZTdiYjI0Y2RjMjY0ZTVjMjhiMDBmZTM3YTk5MmY%26blend-x%3D142%26blend-y%3D491%26blend-mode%3Dnormal%26s%3D434545f97d019ef3c1838b31f4c820a0)
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