feat(perf): contact page loading speed (#7629)

app/models/contact.rb

@@ -23,6 +23,7 @@
 #  index_contacts_on_name_email_phone_number_identifier  (name,email,phone_number,identifier) USING gin
 #  index_contacts_on_nonempty_fields                     (account_id,email,phone_number,identifier) WHERE (((email)::text <> ''::text) OR ((phone_number)::text <> ''::text) OR ((identifier)::text <> ''::text))
 #  index_contacts_on_phone_number_and_account_id         (phone_number,account_id)
+#  index_resolved_contact_account_id                     (account_id) WHERE (((email)::text <> ''::text) OR ((phone_number)::text <> ''::text) OR ((identifier)::text <> ''::text))
 #  uniq_email_per_account_contact                        (email,account_id) UNIQUE
 #  uniq_identifier_per_account_contact                   (identifier,account_id) UNIQUE
 #

db/migrate/20230727065605_add_partial_index_contact_account_id.rb

@@ -0,0 +1,8 @@
+class AddPartialIndexContactAccountId < ActiveRecord::Migration[7.0]
+  disable_ddl_transaction!
+
+  def change
+    add_index :contacts, [:account_id], where: "(email <> '' OR phone_number <> '' OR identifier <> '')",
+                                        name: 'index_resolved_contact_account_id', algorithm: :concurrently
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_07_14_054138) do
+ActiveRecord::Schema[7.0].define(version: 2023_07_27_065605) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
   enable_extension "pg_trgm"
@@ -408,6 +408,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_07_14_054138) do
     t.index "lower((email)::text), account_id", name: "index_contacts_on_lower_email_account_id"
     t.index ["account_id", "email", "phone_number", "identifier"], name: "index_contacts_on_nonempty_fields", where: "(((email)::text <> ''::text) OR ((phone_number)::text <> ''::text) OR ((identifier)::text <> ''::text))"
     t.index ["account_id"], name: "index_contacts_on_account_id"
+    t.index ["account_id"], name: "index_resolved_contact_account_id", where: "(((email)::text <> ''::text) OR ((phone_number)::text <> ''::text) OR ((identifier)::text <> ''::text))"
     t.index ["email", "account_id"], name: "uniq_email_per_account_contact", unique: true
     t.index ["identifier", "account_id"], name: "uniq_identifier_per_account_contact", unique: true
     t.index ["name", "email", "phone_number", "identifier"], name: "index_contacts_on_name_email_phone_number_identifier", opclass: :gin_trgm_ops, using: :gin