Rails-code Bulk Insert Records With Insert_all And Skip Duplicates In Rails Importing thousands of rows one create! at a time issues one INSERT per record plus validations and callbacks. insert_all sends a single multi-row INSERT, which is orders of magnitude faster for imports and
Rails-code Prevent Duplicate Form Submissions In Rails With An Idempotency Key A user double-clicks Submit, or a mobile client retries after a timeout it thought had failed. Two identical requests arrive and you create two orders. Disabling the button in JavaScript does not solve
Rails-code Query Records Created Or Updated In The Last N Hours In Rails Dashboards, digest emails, and sync jobs all need “what changed recently”. Rails’ duration helpers plus a beginless or endless range make this readable and, crucially, index-friendly.
Rails-code Paginate Activerecord Results Without A Gem Using Limit And Offset Kaminari and Pagy are excellent, but a JSON API or an internal admin screen often needs nothing more than a page number and a page size. ActiveRecord gives you that in two methods.
