当该字段是外键时，如何使用 OR 条件进行查询

Question

i need some help with this query in sequelize, this query is working exactly how i want, but i don't have idea how can do that OR condition:

select * from 
core."Customers" c 

inner join core."Townhouses" t 
on t.id = c.townhouseid

inner join portal."TownhouseFreeFreights" tf 
on tf.townhouseid = t.id
or tf.townhouseid is null

where c.id = 1
and tf."minValue" >= 0

the problem for me is that part: or tf.townhouseid is null

what i supposed to do here:

getFreightRules(){
    return Customer.findAll({
      include: [{
        model: Townhouse,
        require: true,
        include:[{
          model: TownhouseFreeFreights,
        }]
      }]
    
    })
  }

Answer 1

Something like this should work ( https://sequelize.org/master/manual/model-querying-basics.html#examples-with--code-op-and--code--and--code-op-or--code- )

getFreightRules(){
    return Customer.findAll({
      include: [{
        model: Townhouse,
        require: true,
        include:[{
          model: TownhouseFreeFreights,
          where: {
           [Op.or]: [
             { tf.townhouseid: t.id },
             { tf.townhouseid: null }
           ]
          }
        }]
      }]
    
    })
  }

alternatively

getFreightRules(){
    return Customer.findAll({
      include: [{
        model: Townhouse,
        require: true,
        include:[{
          model: TownhouseFreeFreights,
          where: {
           tf.townhouseid: {
             [Op.or]: [t.id, null]
           }
         }
       }]
     }]
    })
  }