discourse-ai/db/post_migrate/20240729202857_migrate_pers...

47 lines
1.1 KiB
Ruby

# frozen_string_literal: true
class MigratePersonaLlmOverride < ActiveRecord::Migration[7.1]
def up
fields_to_update = DB.query(<<~SQL)
SELECT id, default_llm
FROM ai_personas
WHERE default_llm IS NOT NULL
SQL
return if fields_to_update.empty?
updated_fields =
fields_to_update
.map do |field|
llm_model_id = matching_llm_model(field.default_llm)
"(#{field.id}, 'custom:#{llm_model_id}')" if llm_model_id
end
.compact
return if updated_fields.empty?
DB.exec(<<~SQL)
UPDATE ai_personas
SET default_llm = new_fields.new_default_llm
FROM (VALUES #{updated_fields.join(", ")}) AS new_fields(id, new_default_llm)
WHERE new_fields.id::bigint = ai_personas.id
SQL
end
def matching_llm_model(model)
provider = model.split(":").first
model_name = model.split(":").last
return if provider == "custom"
DB.query_single(
"SELECT id FROM llm_models WHERE name = :name AND provider = :provider",
{ name: model_name, provider: provider },
).first
end
def down
raise ActiveRecord::IrreversibleMigration
end
end