Customer.tags is Array Postgres field
# t.text "tags", default: [], array: true
Customer
.where(website: "blabla.com")
.where.not(tags: [])
SELECT "customers".* FROM "customers" WHERE "customers"."website" = 'blabla.com' AND "customers"."tags" != '{}'
Customer
.where(website: "blabla.com")
.where(tags: [])
SELECT "customers".* FROM "customers" WHERE "customers"."website" = 'blabla.com' AND "customers"."tags" = '{}'
Customer
.where(website: "blabla.com")
.where(tags: ["bar"])
SELECT "customers".* FROM "customers" WHERE "customers"."website" = 'blabla.com' AND "customers"."tags" = '{bar}'