Qucik の質問です。コードの 2 行目は機能し、最初の行は機能しないのはなぜですか?
Detail.find_by_sql("SELECT * FROM details INNER JOIN players ON players.id = details.player_id WHERE players.team_id = ?", self.id)
Detail.find_by_sql("SELECT * FROM details INNER JOIN players ON players.id = details.player_id WHERE players.team_id = '#{self.id}'")
最初の行で MySQL エラーが表示されます。パラメータが SQL に渡されていないようです
Mysql2::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?' at line 1: SELECT * FROM details INNER JOIN players ON players.id = details.player_id WHERE players.team_id = ?