Aiogram FSM not changing state?

Question

Python

There are states:

class FSM_states(StatesGroup):
    start_chat_state=State()
    leave_chat_state=State()
    see_event_state=State()
    wait_chat_msg_state=State()
    resend_to_owner_state=State()

Functions:

async def start_chat_handler(message: types.Message,state: FSMContext):
    pass

async def leave_chat_handler(message: types.Message, state: FSMContext):
    pass
async def see_event_handler(message: types.Message, state: FSMContext):
    #some code

async def wait_chat_msg_handler(message: types.Message, state: FSMContext):
    pass

async def resend_to_owner_handler(message: types.Message, state: FSMContext):
    pass

And the binding code:

async def start_fsm(dsip:Dispatcher,states:dict,state):
    for s in states:
        dsip.register_message_handler(states[s],state=s)
    await  state.set_state(FSM_states.start_chat_state)

Where states -

fsm_states_dist={
    FSM_handlers.FSM_states.leave_chat_state: FSM_handlers.leave_chat_handler,
    FSM_handlers.FSM_states.start_chat_state:FSM_handlers.see_event_handler,
    FSM_handlers.FSM_states.wait_chat_msg_state:FSM_handlers.wait_chat_msg_handler,
    FSM_handlers.FSM_states.start_chat_state:FSM_handlers.start_chat_handler}

state-

state = bot_dispatcher.current_state(user=usr_msg.from_user.id)

The problem is that after the line has completed

await  state.set_state(FSM_states.start_chat_state)

- the method previously bound in the loop is not called.

even if you write like this:

import aiogram.types as types
from aiogram.dispatcher import FSMContext
FSM_handlers.FSM_states.start_chat_state.set()
@bot_dispatcher.message_handler(state=FSM_handlers.FSM_states.start_chat_state)
async def test_m(message: types.Message, state: FSMContext):
    print('d')

- the method is not called

Answer 1

You can't just state the FSM like you did in the last example. It must be changed in the context of the event handler. Try to catch any state (state='*') and change the state in the namespace of the processing function.