How to use the otree.api.models.IntegerField function in otree

market_id = models.CharField()
    id_in_market = models.IntegerField()
    speed_unit_cost = models.IntegerField()
    net_worth = models.IntegerField()
    cash = models.IntegerField()
    cost = models.IntegerField()
    speed_cost = models.IntegerField()
    tax_paid = models.IntegerField()
    reference_price = models.IntegerField()
    inventory = models.IntegerField()
    bid = models.IntegerField()
    offer = models.IntegerField()
    staged_bid = models.IntegerField()
    staged_offer = models.IntegerField()
    implied_bid = models.IntegerField()
    implied_offer = models.IntegerField()
    best_bid = models.IntegerField()
    best_offer = models.IntegerField()
    e_best_bid = models.IntegerField()
    e_best_offer = models.IntegerField()
    slider_a_x = models.FloatField()
    slider_a_y = models.FloatField()
    slider_a_z = models.FloatField()
    signed_volume = models.FloatField()
    e_signed_volume = models.FloatField()

    # fields for this player's initial strategy decisions
    # these are set from the InitialDecisionSelection form
    initial_slider_a_x = models.FloatField()
    initial_slider_a_y = models.FloatField()
    initial_slider_a_z = models.FloatField()
    initial_role = models.CharField()

cost = models.IntegerField()
    speed_cost = models.IntegerField()
    tax_paid = models.IntegerField()
    reference_price = models.IntegerField()
    inventory = models.IntegerField()
    bid = models.IntegerField()
    offer = models.IntegerField()
    staged_bid = models.IntegerField()
    staged_offer = models.IntegerField()
    implied_bid = models.IntegerField()
    implied_offer = models.IntegerField()
    best_bid = models.IntegerField()
    best_offer = models.IntegerField()
    best_bid_except_me = models.IntegerField()
    best_offer_except_me = models.IntegerField()
    next_bid = models.IntegerField()
    next_offer = models.IntegerField()
    volume_at_best_bid = models.IntegerField()
    volume_at_best_offer = models.IntegerField()
    e_best_bid = models.IntegerField()
    e_best_offer = models.IntegerField()
    slider_a_x = models.FloatField()
    slider_a_y = models.FloatField()
    slider_a_z = models.FloatField()
    signed_volume = models.FloatField()
    e_signed_volume = models.FloatField()
    midpoint_peg = models.BooleanField()
    peg_price = models.IntegerField()
    peg_state = models.IntegerField()
 

class MarketRecord(TimeAwareInSessionRecord):

from otree.api import models
from otree.db.models import Model, ForeignKey
from . import market_environments
from django.utils import timezone
import logging

log = logging.getLogger(__name__)



class TimeAwareInSessionRecord(Model):
    timestamp = models.DateTimeField(default=timezone.now)
    trigger_event_type = models.CharField()
    event_no = models.IntegerField()
    subsession_id = models.IntegerField()
    market_id = models.IntegerField()


class TraderRecord(TimeAwareInSessionRecord):
    
    csv_meta = (
    'timestamp', 'subsession_id', 'market_id', 'player_id', 'trigger_event_type',
    'event_no',  'trader_model_name', 'inventory', 'bid', 'offer', 
    'best_bid_except_me', 'best_offer_except_me',
    'delay', 'staged_bid', 'staged_offer', 'implied_bid', 
    'implied_offer', 'slider_a_x','slider_a_y', 'slider_a_z',
    'net_worth', 'cash', 'tax_paid', 'speed_cost', 'midpoint_peg', 'peg_price', 'peg_state')

    # timestamp = models.DateTimeField(default=timezone.now)
    # trigger_event_type = models.CharField()
    # event_no = models.IntegerField()
    # subsession_id = models.IntegerField()

from .dispatcher import DispatcherFactory

log = logging.getLogger(__name__)

class Constants(BaseConstants):
    name_in_url = 'hft'
    players_per_group = None
    num_rounds = 3


class Subsession(BaseSubsession):
    model_name = models.StringField(initial='subsession')
    auction_format = models.StringField()
    session_duration = models.IntegerField()
    batch_length = models.IntegerField(initial=0)
    code = models.CharField(default=random_chars_8)

    def creating_session(self):
        def create_trade_session(session_format):
            trade_session_cls = TradeSessionFactory.get_session(session_format)
            dispatcher = DispatcherFactory.get_dispatcher(session_format)
            trade_session = trade_session_cls(self, session_format, dispatcher)
            environment = market_environments.environments[session_format]
            for event_type in environment.exogenous_events:
                event_filename = self.session.config[event_type].pop(0)
                trade_session.register_exogenous_event(
                    event_type, event_filename)
            return trade_session
        session_format = self.session.config['environment']    
        if self.round_number == 1:
            self.session.config = utility.process_configs(

exchange_port = models.IntegerField()
    # subsession_id = models.CharField()
    market_id = models.CharField()
    id_in_market = models.IntegerField()
    speed_unit_cost = models.IntegerField()
    net_worth = models.IntegerField()
    cash = models.IntegerField()
    cost = models.IntegerField()
    speed_cost = models.IntegerField()
    tax_paid = models.IntegerField()
    reference_price = models.IntegerField()
    inventory = models.IntegerField()
    bid = models.IntegerField()
    offer = models.IntegerField()
    staged_bid = models.IntegerField()
    staged_offer = models.IntegerField()
    implied_bid = models.IntegerField()
    implied_offer = models.IntegerField()
    best_bid = models.IntegerField()
    best_offer = models.IntegerField()
    e_best_bid = models.IntegerField()
    e_best_offer = models.IntegerField()
    slider_a_x = models.FloatField()
    slider_a_y = models.FloatField()
    slider_a_z = models.FloatField()
    signed_volume = models.FloatField()
    e_signed_volume = models.FloatField()

    # fields for this player's initial strategy decisions
    # these are set from the InitialDecisionSelection form
    initial_slider_a_x = models.FloatField()
    initial_slider_a_y = models.FloatField()

name_in_url = 'survey'
    players_per_group = None
    num_rounds = 1


class Subsession(BaseSubsession):
    pass


class Group(BaseGroup):
    pass


class Player(BasePlayer):

    age = models.IntegerField(label='What is your age?', min=13, max=125)

    gender = models.StringField(
        choices=[['Male', 'Male'], ['Female', 'Female']],
        label='What is your gender?',
        widget=widgets.RadioSelect,
    )

    crt_bat = models.IntegerField(
        label='''
        A bat and a ball cost 22 dollars in total.
        The bat costs 20 dollars more than the ball.
        How many dollars does the ball cost?'''
    )

    crt_widget = models.IntegerField(
        label='''

# def status_update(self, new, field=None):
    #     k = Constants.player_status_key.format(self=self)
    #     status = cache.get(k)
    #     if field in Constants.player_state:
    #         status[field] = new
    #     elif field in Constants.player_accum:
    #         status[field] += new
    #     else:
    #         raise ValueError('invalid field.') 
    #     cache.set(k, status, timeout=None)

class Investor(Model):

    group = ForeignKey(Group)
    order_count = models.IntegerField(initial=1)

    def receive_from_consumer(self, msg):
        side = msg['direction']
        s = ('buy' if side=='B' else 'sell')
        log.debug('Group%d: investor%d: %s.' % (self.group.id, self.order_count, s))
        self.invest(side)

    def invest(self, side):
        p = (2147483647 if side == 'B' else 0)
        order = Order(
            pid= 0, count=self.order_count, status='stage', 
            side=side, price=p, time_in_force=self.group.subsession.batch_length  # LOL
        )
        ouch = [translate.enter(order)]
        self.group.send_exchange([ouch])   # send exchange expects list of lists
        self.order_count += 1

pass


class Player(BasePlayer):

    channel = models.CharField(max_length=255)
    consented = models.BooleanField(initial=False)
    exchange_host = models.CharField()
    exchange_port = models.IntegerField()
    # subsession_id = models.CharField()
    market_id = models.CharField()
    id_in_market = models.IntegerField()
    speed_unit_cost = models.IntegerField()
    net_worth = models.IntegerField()
    cash = models.IntegerField()
    cost = models.IntegerField()
    speed_cost = models.IntegerField()
    tax_paid = models.IntegerField()
    reference_price = models.IntegerField()
    inventory = models.IntegerField()
    bid = models.IntegerField()
    offer = models.IntegerField()
    staged_bid = models.IntegerField()
    staged_offer = models.IntegerField()
    implied_bid = models.IntegerField()
    implied_offer = models.IntegerField()
    best_bid = models.IntegerField()
    best_offer = models.IntegerField()
    e_best_bid = models.IntegerField()
    e_best_offer = models.IntegerField()
    slider_a_x = models.FloatField()
    slider_a_y = models.FloatField()

'field': models.IntegerField(min=0, max=20),
                    }),
                    ('q_comment', {
                        'text': "Please give us feedback on the experiment:",
                        'field': models.LongStringField(max_length=500)
                    }),
                ]
            }
        ]
    },
)

# now dynamically create the Player class from the survey definitions
# we can also pass additional (non-survey) fields via `other_fields`
Player = create_player_model_for_survey('otreeutils_example2.models', SURVEY_DEFINITIONS, other_fields={
    'treatment': models.IntegerField()
})

log.exception(e)
    else:
        for _, process_list in subprocesses.items():
            if process_list:
                for process in process_list:
                    try:
                        process.kill()
                    except Exception as e:
                        log.exception(e)




class Subsession(BaseSubsession):
    design = models.StringField()
    next_available_exchange = models.IntegerField()
    players_per_group = models.IntegerField()
    round_length = models.IntegerField()
    batch_length = models.IntegerField(initial=0)
    trade_ended = models.BooleanField(initial=False)
    code = models.CharField(default=random_chars_8)
    has_trial = models.BooleanField(initial=True)
    is_trial = models.BooleanField(initial=False)
    trial_length = models.IntegerField(initial=0)
    log_file = models.StringField()
    first_round = models.IntegerField(initial=1)
    last_round = models.IntegerField(initial=0)
    total_rounds = models.IntegerField(initial=0)
    restore_from = models.CharField()
    restore = models.BooleanField(initial=False)
    lambda_i = models.FloatField()
    lambda_j = models.FloatField()