ChatMemberUpdated#

Usage#

Handle user leave or join events

from aiogram.filters import IS_MEMBER, IS_NOT_MEMBER

@router.chat_member(ChatMemberUpdatedFilter(IS_MEMBER >> IS_NOT_MEMBER))
async def on_user_leave(event: ChatMemberUpdated): ...

@router.chat_member(ChatMemberUpdatedFilter(IS_NOT_MEMBER >> IS_MEMBER))
async def on_user_join(event: ChatMemberUpdated): ...

Or construct your own terms via using pre-defined set of statuses and transitions.

Explanation#

class aiogram.filters.chat_member_updated.ChatMemberUpdatedFilter(member_status_changed: _MemberStatusMarker | _MemberStatusGroupMarker | _MemberStatusTransition)[source]#

member_status_changed#

You can import from aiogram.filters all available variants of statuses, status groups or transitions:

Statuses#

name	Description
`CREATOR`	Chat owner
`ADMINISTRATOR`	Chat administrator
`MEMBER`	Member of the chat
`RESTRICTED`	Restricted user (can be not member)
`LEFT`	Isn’t member of the chat
`KICKED`	Kicked member by administrators

Statuses can be extended with is_member flag by prefixing with + (for is_member == True) or - (for is_member == False) symbol, like +RESTRICTED or -RESTRICTED

Status groups#

The particular statuses can be combined via bitwise or operator, like CREATOR | ADMINISTRATOR

name	Description
`IS_MEMBER`	Combination of `(CREATOR \| ADMINISTRATOR \| MEMBER \| +RESTRICTED)` statuses.
`IS_ADMIN`	Combination of `(CREATOR \| ADMINISTRATOR)` statuses.
`IS_NOT_MEMBER`	Combination of `(LEFT \| KICKED \| -RESTRICTED)` statuses.

Transitions#

Transitions can be defined via bitwise shift operators >> and <<. Old chat member status should be defined in the left side for >> operator (right side for <<) and new status should be specified on the right side for >> operator (left side for <<)

The direction of transition can be changed via bitwise inversion operator: ~JOIN_TRANSITION will produce swap of old and new statuses.

name	Description
`JOIN_TRANSITION`	Means status changed from `IS_NOT_MEMBER` to `IS_MEMBER` (`IS_NOT_MEMBER >> IS_MEMBER`)
`LEAVE_TRANSITION`	Means status changed from `IS_MEMBER` to `IS_NOT_MEMBER` (`~JOIN_TRANSITION`)
`PROMOTED_TRANSITION`	Means status changed from `(MEMBER \| RESTRICTED \| LEFT \| KICKED) >> ADMINISTRATOR` (`(MEMBER \| RESTRICTED \| LEFT \| KICKED) >> ADMINISTRATOR`)

Note

Note that if you define the status unions (via |) you will need to add brackets for the statement before use shift operator in due to operator priorities.

Allowed handlers#

Allowed update types for this filter:

my_chat_member
chat_member