find using model association - sql

Question

Dialect: postgres
Database version: #latest
Sequelize version: #latest
I'm trying to find out how to use an associate model. I've got 3 models: post, postCity and region. They have the following relation:
postCity (post_id, region_id) associate to post (post_id) and region (region_id). I am using a search function like this:
include: [
{
model: models.postCity,
include:[{model:models.region}],
attributes: [[models.sequelize.fn('count', 'post_id'), 'count']],
}
],
where: {
$or: [
{
"create_by" : {$not: 67}
},
{
// "postCities.region_name":{$iLike: "%Guangazhou2%"}
},
{
"description":{$iLike: "%India%"}
}
]
}
which leads to:
SELECT "post"."post_id", "post"."description", "post"."create_by",
"post"."create_time", "post"."update_time", "post"."country_id",
"postCities"."post_id" AS "postCities.post_id",
"postCities"."region_id" AS "postCities.region_id",
"postCities"."order_no" AS "postCities.order_no",
"postCities.region"."region_id" AS "postCities.region.region_id",
"postCities.region"."region_name" AS "postCities.region.region_name",
"postCities.region"."country_id" AS "postCities.region.country_id",
"postCities.region"."province_id" AS "postCities.region.province_id"
FROM "t_post" AS "post"
LEFT OUTER JOIN "t_post_city" AS "postCities"
ON "post"."post_id" = "postCities"."post_id"
LEFT OUTER JOIN "t_region" AS "postCities.region"
ON "postCities"."region_id" = "postCities.region"."region_id"
WHERE ("post"."create_by" != 67 OR "post"."description" ILIKE '%India%');
When I uncomment "postCities.region_name":{$iLike: "%Guangazhou2%"} then I get this error
column post.postCities.region_name does not exist
I simply like to my query to be like this
... WHERE ("post"."create_by" != 67
OR "post"."description" ILIKE '%India%'
OR "postCities.region_name" ILIKE: "%Guangazhou2%")
Update
I also tried to include [{model:models.region, where:{"region_name":{$iLike: "%Guangazhou2%"}}}] but this doesn't give me the appropriate result.

Answer 1

In order to add condition to included tables, you should wrap condition with $ symbol, like it:
include: [{
model: models.postCity,
include:[{model:models.region}],
attributes: [[models.sequelize.fn('count', 'post_id'), 'count']],
}],
where: {
$or: [{
"create_by" : {$not: 67}
}, {
"$postCities.region.region_name$":{$iLike: "%Guangazhou2%"}
}, {
"description":{$iLike: "%India%"}
}]
}