如何使用Ransack和find_by_sql

Question

如何使用Ransack和「find_by_sql」？ 我一般這樣做：

def index 

    @m = Mymodel.ransack(params[:q]) 
    @mymodels = @m.result.page(params[:page]) 

end 

我可以用洗劫做一個自定義查詢？：

@mymodels = Mymodel.find_by_sql(["SELECT ... ", current_user]) 

Answer 1

如果我沒有得到它時，這是要你想要的：

def index 
    @m = Mymodel.ransack(params[:q]) 
    @mymodels = @m.result.page(param[:page]).where(user: current_user) 
end 

要直接回答你的問題，你可以將它轉換爲SQL字符串，但是你不會（或者很難）能夠使用current_user作爲參數：

def index 
    @m = Mymodel.ransack(params[:q]) 
    sql = @m.result.page(param[:page]).to_sql 
    @mymodels = Mymodel.find_by_sql(sql, current_user) 
    # the line just above won't work immediately because you'll need to 
    # modify the `sql` variable manually by inserting the `?` that you'll 
    # need to map that to the `current_user` that you passed as an argument 
end