メモ || Arelのwhere系メソッド一覧 User.w...Arelのwhere系メソッド一覧 User.where(User.arel_table[:name].eq("aa")).to_sql => SELECT "users".* FROM "users" WHERE "users"."name" = 'aa' User.where(User.arel_table[:name].eq(nil)).to_sql => SELECT "users".* FROM "users" WHERE "users"."name" IS NULL User.where(User.arel_table[:name].eq_all(["aa","bb"])).to_sql => SELECT "users".* FROM "users" WHERE (("users"."name" = 'aa' AND "users"."name" = 'bb')) User.
