rails find_by_sql
find_by_sql. Importance_2. Ruby on Rails latest stable (v4.2.7) - 0 notes - Class: Querying. 1.0.0; 1.1.1; 1.1.6; 1.2.0; 1.2.6; 2.0.0; 2.0.3; 2.1.0; 2.2.1; 2.3.2; 2.3.8; 3.0.0; 3.0.5; 3.0.9; 3.1.0; 3.2.1 ... If you call Product.find_by_sql then the result, See Converting an array of objects to ActiveRecord::Relation. The trick is that you take the ids of the results of the raw SQL statement, and perform a second query using where so it returns a ActiveRecord::Relation . as_array = Alarma.find_by_sql("
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 rails find_by_sql 相關參考資料
find_by_sql (ActiveRecord::Base) - APIdock
A simple SQL query spanning multiple tables Post.find_by_sql "SELECT p.title, c.author FROM posts p, comments c WHERE p.id = c.post_id" > [#<Post:0x36bff9c @attributes="title&quo... https://apidock.com find_by_sql (ActiveRecord::Querying) - APIdock
find_by_sql. Importance_2. Ruby on Rails latest stable (v4.2.7) - 0 notes - Class: Querying. 1.0.0; 1.1.1; 1.1.6; 1.2.0; 1.2.6; 2.0.0; 2.0.3; 2.1.0; 2.2.1; 2.3.2; 2.3.8; 3.0.0; 3.0.5; 3.0.9; 3.1.0; 3.... https://apidock.com ruby on rails - find_by_sql to something that returns an ...
See Converting an array of objects to ActiveRecord::Relation. The trick is that you take the ids of the results of the raw SQL statement, and perform a second query using where so it returns a Active... https://stackoverflow.com activerecord - Rails find_by_sql - Use "?" literally rather than ...
ActiveRecord isn't smart enough to ignore placeholders in string literals so it thinks that the ? in '?' is a placeholder rather than part of a string. The easiest way around this is to u... https://stackoverflow.com ruby on rails - parameters sql query in find by sql - Stack Overflow
The documentation explains it all. You do it like this, where author_id and start_date are the parameters passed in. Post.find_by_sql ["SELECT title FROM posts WHERE author = ? AND created > ... https://stackoverflow.com Ruby on Rails 實戰聖經| ActiveRecord Query Interface - 資料表操作
find_by_sql. 如果需要手動撰寫SQL，可以使用 find_by_sql 和 count_by_sql ，例如： c8 = Category.find_by_sql("select * from categories"). 不過需要用到的機會應該很少。 https://ihower.tw Active Record 查詢— Ruby on Rails 指南
如果 find 沒找到符合條件的記錄，則會拋出 ActiveRecord::RecordNotFound 異常。 也可以用來查詢多個物件：傳給 find 一個主鍵陣列即可。會回傳陣列所有提供的主鍵所找到的紀錄，譬如： ... https://rails.ruby.tw ActiveRecord::Querying - Rails API - Ruby on Rails
Executes a custom SQL query against your database and returns all the results. The results will be returned as an array with columns requested encapsulated as attributes of the model you call this met... http://api.rubyonrails.org |