Rails，將兩個表與每個tabe的where子句連接起來

Question

我是web開發和rails的新手，我試圖爲我第一次構建一個查詢對象。我有一個表玩家，和一個表DefensiveStats，它有一個foriegn-key player_id，所以這個表中的每一行都屬於一個玩家。玩家有一個字段api_player_number，這是我參考的第三方使用的ID。 DefensiveStats對象有兩個與此查詢相關的字段 - 一個season_number整數和一個week_number整數。我想要做的是構建一個帶有3個參數的單個查詢：api_player_number，season_number和week_number，並且它應該返回帶有相應季節和星期編號的DefensiveStats對象，屬於具有api_player_number =的玩家傳入api_player_number。

以下是我已經嘗試：

class DefensiveStatsWeekInSeasonQuery 
def initialize(season_number, week_number, api_player_number) 
    @season_number = season_number 
    @week_number = week_number 
    @api_player_number = api_player_number 
end 

# data method always returns an object or list of object, not a relation 
def data 
    defensive_stats = Player.where(api_player_number: @api_player_number) 
    .joins(:defensive_stats) 
    .where(season_number:@season_number, week_number: @week_number) 
    if defensive_stats.nil? 
     defensive_stats = DefensiveStats.new 
    end 
    defensive_stats 
end 

末

然而，這是不行的，因爲它進行第二次的where子句播放器上的類，而不是DefensiveStats類 - >專，「SQLite3 :: SQLException：no such column：players.season_number」

我該如何構造這個查詢？謝謝！！！

Answer 1

Player.joins(:defensive_stats).where(players: {api_player_number: @api_player_number}, defensive_stats: {season_number: @season_number, week_number: @week_number}) 

OR

Player.joins(:defensive_stats).where("players.api_player_number = ? and defensive_stats.season_number = ? and defensive_stats.week_number = ?", @api_player_number, @season_number, @week_number)