漂亮的紅寶石SQL打印

有沒有一種簡單的方法來漂亮的打印在（rails 3）控制檯中的隨機SQL？漂亮的紅寶石SQL打印

它不必瞭解所有可能的方言或超級先進的方言。
我真正想要的是檢查由ActiveRecord生成的SQL更容易。

目前我只是複製SQL去在線格式化它顯然是一個生產力殺手。

我真的很想query.to_sql.pretty_format_sql，看到更好的輸出。

謝謝。

2012-04-27 Dmytrii Nagirniak

如果你正在使用JRuby，你可以考慮爲[類似的問題]一些答案（http://stackoverflow.com/q/312552/215168）合影的Java，比如Hibernate的'org.hibernate作爲。 jdbc.util.BasicFormatterImpl' – 2012-04-27 14:11:51

哈，使用MRI。 – 2012-04-29 22:25:15

試試這個：

git clone https://github.com/sonota/anbt-sql-formatter 
cd anbt-sql-formatter 
rails setup.rb

然後，在Rails初始化：

# config/initializers/pretty_format_sql.rb 
class String 
    def pretty_format_sql 
    require "anbt-sql-formatter/formatter" 
    rule = AnbtSql::Rule.new 
    rule.keyword = AnbtSql::Rule::KEYWORD_UPPER_CASE 
    %w(count sum substr date).each{|func_name| 
     rule.function_names << func_name.upcase 
    } 
    rule.indent_string = " " 
    formatter = AnbtSql::Formatter.new(rule) 
    formatter.format(self) 
    end 
end

測試：

rails console 
# Some complex SQL 
puts Recipe.joins(:festivity).where(['? BETWEEN festivities.starts_at AND festivities.ends_at', Time.utc(0,Time.now.month,Time.now.day,12,0,0)]).to_sql.pretty_format_sql 
SELECT 
     "recipes" . * 
    FROM 
     "recipes" INNER JOIN "festivities" 
      ON "festivities" . "id" = "recipes" . "festivity_id" 
    WHERE 
     (
      '0000-04-27 12:00:00.000000' BETWEEN festivities.starts_at AND festivities.ends_at 
     ) 
=> nil

我離開煉就你（重構：猴子補丁 - >模塊，定製格式等:-)）

來源

2012-04-27 10:35:10 mdesantis

它應該做的工作，但我真的想避免使用不推薦使用的rails插件（非寶石）。 – 2012-04-27 10:39:37

我覺得它不是一個如此「標準」的庫...但它不應該很難提取出好的部分，並使它們成爲寶石（我測試了它，它工作得很好，看到我不能找到替代品，爲什麼重寫工作的東西？）...我會嘗試！ – mdesantis 2012-04-27 17:04:15

的first answer的anbt-sql-formatter爲available as a gem，你可以安裝它：

gem install anbt-sql-formatter

這裏使用的例子：

require "anbt-sql-formatter/formatter" 
rule = AnbtSql::Rule.new 
    formatter = AnbtSql::Formatter.new(rule) 

[ 
"SELECT `col1`, `col2` FROM `table` WHERE ((`col1` = 1) AND (`col2` = 5))", 
"SELECT `col1`, `col2` FROM `table` WHERE (`col1` = 1) AND (`col2` = 5)", 
"SELECT `col1` FROM `table` WHERE (`col1` IN (SELECT * FROM `table21` WHERE (`col2` = 5)))", 
"SELECT `col1` FROM `table` INNER JOIN `tab2` ON (`tab1`.`id` = `tab2`.`id1`) WHERE ((`id` >= 1) AND (`id` <= 5))", 
].each{|sql_cmd| 
    puts "======" 
    puts sql_cmd 
    puts formatter.format(sql_cmd) 
}

結果：

====== 
SELECT `col1`, `col2` FROM `table` WHERE ((`col1` = 1) AND (`col2` = 5)) 
SELECT 
     `col1` 
     ,`col2` 
    FROM 
     `table` 
    WHERE 
     (
      (
       `col1` = 1 
      ) 
      AND (
       `col2` = 5 
      ) 
     ) 
====== 
SELECT `col1`, `col2` FROM `table` WHERE (`col1` = 1) AND (`col2` = 5) 
SELECT 
     `col1` 
     ,`col2` 
    FROM 
     `table` 
    WHERE 
     (
      `col1` = 1 
     ) 
     AND (
      `col2` = 5 
     ) 
====== 
SELECT `col1` FROM `table` WHERE (`col1` IN (SELECT * FROM `table21` WHERE (`col2` = 5))) 
SELECT 
     `col1` 
    FROM 
     `table` 
    WHERE 
     (
      `col1` IN (
       SELECT 
         * 
        FROM 
         `table21` 
        WHERE 
         (
          `col2` = 5 
         ) 
      ) 
     ) 
====== 
SELECT `col1` FROM `table` INNER JOIN `tab2` ON (`tab1`.`id` = `tab2`.`id1`) WHERE ((`id` >= 1) AND (`id` <= 5)) 
SELECT 
     `col1` 
    FROM 
     `table` INNER JOIN `tab2` 
      ON (
      `tab1`.`id` = `tab2`.`id1` 
     ) 
    WHERE 
     (
      (
       `id` >= 1 
      ) 
      AND (
       `id` <= 5 
      ) 
     )

也有擴大規則的可能性，例如

# User defined additional functions: 
%w(count sum substr date coalesce).each{|func_name| 
    rule.function_names << func_name.upcase 
}

來源

2013-08-25 07:55:58 knut

漂亮的紅寶石SQL打印

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