mirror of
https://github.com/freqtrade/freqtrade.git
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58 lines
2.3 KiB
Python
58 lines
2.3 KiB
Python
from datetime import datetime
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from typing import Optional
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from sqlalchemy import Column, DateTime, ForeignKey, Integer, String, Text, UniqueConstraint
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from sqlalchemy.orm import Query, relationship
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from freqtrade.constants import DATETIME_PRINT_FORMAT
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from freqtrade.persistence.base import _DECL_BASE
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class KeyValue(_DECL_BASE):
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"""
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KeyValue database model
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Keeps records of metadata as key/value store
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for trades or global persistant values
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One to many relationship with Trades:
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- One trade can have many metadata entries
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- One metadata entry can only be associated with one Trade
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"""
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__tablename__ = 'keyvalue'
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# Uniqueness should be ensured over pair, order_id
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# its likely that order_id is unique per Pair on some exchanges.
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__table_args__ = (UniqueConstraint('ft_trade_id', 'kv_key', name="_trade_id_kv_key"),)
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id = Column(Integer, primary_key=True)
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ft_trade_id = Column(Integer, ForeignKey('trades.id'), index=True, default=0)
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trade = relationship("Trade", back_populates="keyvalues")
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kv_key = Column(String(255), nullable=False)
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kv_type = Column(String(25), nullable=False)
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kv_value = Column(Text, nullable=False)
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created_at = Column(DateTime, nullable=False, default=datetime.utcnow)
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updated_at = Column(DateTime, nullable=True)
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def __repr__(self):
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create_time = (self.created_at.strftime(DATETIME_PRINT_FORMAT)
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if self.created_at is not None else None)
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update_time = (self.updated_at.strftime(DATETIME_PRINT_FORMAT)
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if self.updated_at is not None else None)
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return (f'KeyValue(id={self.id}, key={self.kv_key}, type={self.kv_type}, ' +
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f'value={self.kv_value}, trade_id={self.ft_trade_id}, created={create_time}, ' +
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f'updated={update_time})')
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@staticmethod
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def query_kv(key: Optional[str] = None, trade_id: Optional[int] = None) -> Query:
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"""
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Get all keyvalues, if trade_id is not specified
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return will be for generic values not tied to a trade
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:param trade_id: id of the Trade
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"""
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filters = []
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filters.append(KeyValue.ft_trade_id == trade_id if trade_id is not None else 0)
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if key is not None:
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filters.append(KeyValue.kv_key.ilike(key))
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return KeyValue.query.filter(*filters)
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