Previously rails 7.1 added the support to add enums and drop the enums.
Now, Rails 7.1 has extended the ability to rename an enum, add enum value and rename enum value for the Postgres database adapter.
Before:
Before this change the only way to achieve renaming enum, adding enum value or renaming enum values was to use raw SQL statements.
Renaming the enum:
def up
execute <<-SQL
ALTER TYPE user_status RENAME TO user_state;
SQL
endAdding a new enum value:
def up
execute <<-SQL
ALTER TYPE user_state ADD VALUE 'archived';
ALTER TYPE user_state ADD VALUE 'pending' BEFORE 'active';
ALTER TYPE user_state ADD VALUE 'trashed' AFTER 'archived';
SQL
endRenaming the enum value:
def up
execute <<-SQL
ALTER TYPE user_state RENAME VALUE "trashed" TO "deleted"
SQL
endAfter:
After this change now it is easier to rename the enum, add a new value and rename the enum value
Renaming the enum:
def up
rename_enum :user_status, to: :user_state
end--
-- Name: user_state; Type: TYPE; Schema: public; Owner: -
--
CREATE TYPE public.user_state AS ENUM (
'active'
);Adding a new enum value:
def up
add_enum_value :user_state, 'archived'
add_enum_value :user_state, 'pending', before: 'active'
add_enum_value :user_state, 'trashed', after: 'archived'
endCREATE TYPE public.user_state AS ENUM (
'pending',
'active',
'archived',
'trashed'
);Renaming the enum value:
Record before:
#<User:0x000000010cb1d390
id: 1,
email: "[email protected]",
phone: "234567890",
state: "trashed"
>def up
rename_enum_value :user_state, from: "trashed", to: "deleted"
endCREATE TYPE public.user_state AS ENUM (
'pending',
'active',
'archived',
'deleted'
);Record after:
#<User:0x000000010cb1d390
id: 1,
email: "[email protected]",
phone: "234567890",
state: "deleted"
>References:
Enum in PostgreSQL - https://www.postgresql.org/docs/current/datatype-enum.html
