How can use LEFT JOIN at Sequelize?

问题

Relations:

Shop.hasMany(ShopAd, {foreignKey : 'shop_id', as : 'ads'});
ShopAd.belongsTo(Shop, {foreignKey : 'id'})

I using :

Shop.findAll({where:{id:shopId}, include:[{model:ShopAd, as:'ads', where:{is_valid:1, is_vertify:1}}]}).success(function(result) {
        callback(result);
    });

But the sql is :

SELECT `Shop`.`id`, `Shop`.`user_id`, `Shop`.`short_name`, `Shop`.`description`, `Shop`.`tips`, `Shop`.`city`, `Shop`.`province`, `Shop`.`address`, `Shop`.`logo`, `Shop`.`publicity_photo`, `Shop`.`taobao_link`, `Shop`.`is_vertify`, `Shop`.`create_time`, `Shop`.`update_time`, `ads`.`id` AS `ads.id`, `ads`.`shop_id` AS `ads.shop_id`, `ads`.`pic_url` AS `ads.pic_url`, `ads`.`description` AS `ads.description`, `ads`.`link` AS `ads.link`, `ads`.`is_valid` AS `ads.is_valid`, `ads`.`is_vertify` AS `ads.is_vertify`, `ads`.`create_time` AS `ads.create_time`, `ads`.`update_time` AS `ads.update_time` FROM `weshop_shop` AS `Shop` INNER JOIN `weshop_shop_advertsing` AS `ads` ON `Shop`.`id` = `ads`.`shop_id` AND `ads`.`is_valid`=1 AND `ads`.`is_vertify`=1 WHERE `Shop`.`id`='1';

I want using "LEFT JOIN" , What can i do?

回答1:

using: required:false

sentences：

Shop.findAll({
     where:{id:shopId}, 
     include:[
         { model:ShopAd, as:'ads', 
           where:{ 
                 is_valid:1, 
                 is_vertify:1},   
           required:false
           }
         ]
      })
      .success(function(result) {
        callback(result);
    });

回答2:

required: true forces an INNER JOIN, use required: false to force a LEFT JOIN. Taken from here.

来源：https://stackoverflow.com/questions/27561915/how-can-use-left-join-at-sequelize

标签

node.js

sequelize.js