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PORails3 and ActiveRecord with legacy database: JOIN not returning other table columns
 

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  1. PORails3 and ActiveRecord with legacy database: JOIN not returning other table columns
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    <p>I have a legacy database that contains two different tables (tbl_players and tbl_player_ratings) that link to one another on a common column (player_key). </p> <p>My problem: With Rails3, when I attempt to retrieve PlayersRatings joined to Players, only columns from PlayerRatings are returned. However, if I execute the same SQL query at the mysql command line, columns from both tables are returned.</p> <p>For simplicity, I here provide just a few of the columns from each table.</p> <h3>tbl_players</h3> <pre><code>player_key, last_name </code></pre> <h3>tbl_player_ratings</h3> <pre><code>player_key, rating </code></pre> <p>My Rails classes representing these tables look as follows:</p> <pre><code>class PlayerRating &lt; ActiveRecord::Base establish_connection :legacy set_table_name 'tbl_player_ratings' set_primary_key "player_key" belongs_to :player, :foreign_key =&gt; 'player_key' end class Player &lt; ActiveRecord::Base establish_connection :legacy set_table_name 'tbl_players' set_primary_key "player_key" has_many :player_ratings, :foreign_key =&gt; 'player_key' end </code></pre> <p>The query that I'm running in the rails console:</p> <pre><code>PlayerRating.joins(:player).select("*").limit(1) </code></pre> <p>This returns a sole PlayerRating without any Player fields represented.</p> <p>The SQL produced by the above rails command:</p> <pre><code>SELECT * FROM `tbl_player_ratings` INNER JOIN `tbl_players` ON `tbl_players`.`player_key` = `tbl_player_ratings`.`player_key` LIMIT 1 </code></pre> <p>When I execute that exact command at the mysql command-line, all columns in both tables are returned.</p> <p>Why does Rails and ActiveRecord not do the same (return all columns in both tables)?</p>
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    1. COPlease refer [here][1] and mark as duplicate. [1]: http://stackoverflow.com/questions/4566521/rails-joins-and-include-columns-from-joins-table
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