我从API获得了一个对象：
class Order(object):
""" generated source for class Order """
# main order fields
m_orderId = 0
m_clientId = 0
m_permId = 0
m_action = ""
m_totalQuantity = 0
m_orderType = ""
m_lmtPrice = float()
m_auxPrice = float()
# extended order fields
m_tif = "" # "Time in Force" - DAY, GTC, etc.
m_activeStartTime = "" # GTC orders
m_activeStopTime = "" # GTC orders
m_ocaGroup = "" # one cancels all group name
m_ocaType = 0 # 1 = CANCEL_WITH_BLOCK, 2 = REDUCE_WITH_BLOCK, 3 = REDUCE_NON_BLOCK
m_orderRef = ""
m_transmit = bool() # if false, order will be created but not transmited
m_parentId = 0 # Parent order Id, to associate Auto STP or TRAIL orders with the original order.
m_blockOrder = bool()
m_sweepToFill = bool()
m_displaySize = 0
m_triggerMethod = 0 # 0=Default, 1=Double_Bid_Ask, 2=Last, 3=Double_Last, 4=Bid_Ask, 7=Last_or_Bid_Ask, 8=Mid-point
m_outsideRth = bool()
m_hidden = bool()
m_goodAfterTime = "" # FORMAT: 20060505 08:00:00 {time zone}
m_goodTillDate = "" # FORMAT: 20060505 08:00:00 {time zone}
m_overridePercentageConstraints = bool()
m_rule80A = "" # Individual = 'I', Agency = 'A', AgentOtherMember = 'W', IndividualPTIA = 'J', AgencyPTIA = 'U', AgentOtherMemberPTIA = 'M', IndividualPT = 'K', AgencyPT = 'Y', AgentOtherMemberPT = 'N'
m_allOrNone = bool()
m_minQty = 0
m_percentOffset = float() # REL orders only; specify the decimal, e.g. .04 not 4
m_trailStopPrice = float() # for TRAILLIMIT orders only
m_trailingPercent = float() # specify the percentage, e.g. 3, not .03
# Financial advisors only
m_faGroup = ""
m_faProfile = ""
m_faMethod = ""
m_faPercentage = ""
# Institutional orders only
m_openClose = "" # O=Open, C=Close
m_origin = 0 # 0=Customer, 1=Firm
m_shortSaleSlot = 0 # 1 if you hold the shares, 2 if they will be delivered from elsewhere. Only for Action="SSHORT
m_designatedLocation = "" # set when slot=2 only.
m_exemptCode = 0
# SMART routing only
m_discretionaryAmt = float()
m_eTradeOnly = bool()
m_firmQuoteOnly = bool()
m_nbboPriceCap = float()
m_optOutSmartRouting = bool()
# BOX or VOL ORDERS ONLY
m_auctionStrategy = 0 # 1=AUCTION_MATCH, 2=AUCTION_IMPROVEMENT, 3=AUCTION_TRANSPARENT
# BOX ORDERS ONLY
m_startingPrice = float()
m_stockRefPrice = float()
m_delta = float()
# pegged to stock or VOL orders
m_stockRangeLower = float()
m_stockRangeUpper = float()
# VOLATILITY ORDERS ONLY
m_volatility = float() # enter percentage not decimal, e.g. 2 not .02
m_volatilityType = 0 # 1=daily, 2=annual
m_continuousUpdate = 0
m_referencePriceType = 0 # 1=Bid/Ask midpoint, 2 = BidOrAsk
m_deltaNeutralOrderType = ""
m_deltaNeutralAuxPrice = float()
m_deltaNeutralConId = 0
m_deltaNeutralSettlingFirm = ""
m_deltaNeutralClearingAccount = ""
m_deltaNeutralClearingIntent = ""
m_deltaNeutralOpenClose = ""
m_deltaNeutralShortSale = bool()
m_deltaNeutralShortSaleSlot = 0
m_deltaNeutralDesignatedLocation = ""
# COMBO ORDERS ONLY
m_basisPoints = float() # EFP orders only, download only
m_basisPointsType = 0 # EFP orders only, download only
# SCALE ORDERS ONLY
m_scaleInitLevelSize = 0
m_scaleSubsLevelSize = 0
m_scalePriceIncrement = float()
m_scalePriceAdjustValue = float()
m_scalePriceAdjustInterval = 0
m_scaleProfitOffset = float()
m_scaleAutoReset = bool()
m_scaleInitPosition = 0
m_scaleInitFillQty = 0
m_scaleRandomPercent = bool()
m_scaleTable = ""
# HEDGE ORDERS ONLY
m_hedgeType = "" # 'D' - delta, 'B' - beta, 'F' - FX, 'P' - pair
m_hedgeParam = "" # beta value for beta hedge (in range 0-1), ratio for pair hedge
# Clearing info
m_account = "" # IB account
m_settlingFirm = ""
m_clearingAccount = "" # True beneficiary of the order
m_clearingIntent = "" # "" (Default), "IB", "Away", "PTA" (PostTrade)
# ALGO ORDERS ONLY
m_algoStrategy = ""
m_algoParams = None
# What-if
m_whatIf = bool()
# Not Held
m_notHeld = bool()
# Smart combo routing params
m_smartComboRoutingParams = None
# order combo legs
m_orderComboLegs = []
def __init__(self):
""" generated source for method __init__ """
self.m_lmtPrice = Double.MAX_VALUE
self.m_auxPrice = Double.MAX_VALUE
self.m_activeStartTime = self.EMPTY_STR
self.m_activeStopTime = self.EMPTY_STR
self.m_outsideRth = False
self.m_openClose = "O"
self.m_origin = self.CUSTOMER
self.m_transmit = True
self.m_designatedLocation = self.EMPTY_STR
self.m_exemptCode = -1
self.m_minQty = Integer.MAX_VALUE
self.m_percentOffset = Double.MAX_VALUE
self.m_nbboPriceCap = Double.MAX_VALUE
self.m_optOutSmartRouting = False
self.m_startingPrice = Double.MAX_VALUE
self.m_stockRefPrice = Double.MAX_VALUE
self.m_delta = Double.MAX_VALUE
self.m_stockRangeLower = Double.MAX_VALUE
self.m_stockRangeUpper = Double.MAX_VALUE
self.m_volatility = Double.MAX_VALUE
self.m_volatilityType = Integer.MAX_VALUE
self.m_deltaNeutralOrderType = self.EMPTY_STR
self.m_deltaNeutralAuxPrice = Double.MAX_VALUE
self.m_deltaNeutralConId = 0
self.m_deltaNeutralSettlingFirm = self.EMPTY_STR
self.m_deltaNeutralClearingAccount = self.EMPTY_STR
self.m_deltaNeutralClearingIntent = self.EMPTY_STR
self.m_deltaNeutralOpenClose = self.EMPTY_STR
self.m_deltaNeutralShortSale = False
self.m_deltaNeutralShortSaleSlot = 0
self.m_deltaNeutralDesignatedLocation = self.EMPTY_STR
self.m_referencePriceType = Integer.MAX_VALUE
self.m_trailStopPrice = Double.MAX_VALUE
self.m_trailingPercent = Double.MAX_VALUE
self.m_basisPoints = Double.MAX_VALUE
self.m_basisPointsType = Integer.MAX_VALUE
self.m_scaleInitLevelSize = Integer.MAX_VALUE
self.m_scaleSubsLevelSize = Integer.MAX_VALUE
self.m_scalePriceIncrement = Double.MAX_VALUE
self.m_scalePriceAdjustValue = Double.MAX_VALUE
self.m_scalePriceAdjustInterval = Integer.MAX_VALUE
self.m_scaleProfitOffset = Double.MAX_VALUE
self.m_scaleAutoReset = False
self.m_scaleInitPosition = Integer.MAX_VALUE
self.m_scaleInitFillQty = Integer.MAX_VALUE
self.m_scaleRandomPercent = False
self.m_scaleTable = self.EMPTY_STR
self.m_whatIf = False
self.m_notHeld = False
它非常冗长，我需要为SQLAlchemy的Order(Base)对象上的每个变量生成一个字段。我有办法以编程方式执行此操作，还是必须复制/粘贴此内容？
答案 0 :(得分：1)
我可能会创建一个git存储库，并尝试更详细地解决这个问题，因为我不知道为什么似乎还没有人这样做：P除非他们有，我无法找到答案......？
from sqlalchemy import Table, MetaData, Column, Integer, String, Float, Boolean
from sqlalchemy import ForeignKey
from sqlalchemy.orm import relationship
from sqlalchemy.orm import mapper
from sqlalchemy import create_engine
metadata = MetaData()
class Hero:
def __init__(self):
self.name = "name"
self.xp = 500
self.luck = 3.7
self.is_alive = True
self.quests = []
self.attributes = {}
self.town = None
hero = Hero() #Some generic object. I was using it for a game database :P
class BuildTable:
def __init__(self, obj):
self.obj = obj
self.tablename = BuildTable.get_table_name(obj)
self.column_names = BuildTable.get_column_names(obj)
self.table = self.build_table()
def build_table(self):
return Table(self.tablename, metadata,
Column('id', Integer, primary_key=True),
*self.build_columns()
)
def build_columns(self):
"""Generate columns for table.
Also builds extra attribute self.extra that will accomodate relationships and such
using recursion.
"""
data = vars(self.obj)
relationships = []
dicts = []
nones = []
for name in data.keys():
column_type = type(data[name])
if type(list()) == column_type:
relationships.append(name)
elif type(int()) == column_type:
yield Column(name, Integer)
elif type(str()) == column_type:
yield Column(name, String)
elif type(dict()) == column_type:
dicts.append(name)
elif type(float()) == column_type:
yield Column(name, Float)
elif type(None) == column_type:
nones.append(name)
elif type(bool()) == column_type:
yield Column(name, Boolean)
else:
raise TypeError("Can't yet handle type {}".format(type(data[name])))
#Methods that requir extra work.
#They might be relationships, foreign keys or children or parents or something.
#Or just basic lists, or dicts or booleans
self.extra = {'relationships': relationships, 'dictionaries': dicts, 'Nones': nones}
def get_column_names(obj):
return (attr for attr in vars(obj))
def get_table_name(obj):
return obj.__class__.__name__
hero_table = BuildTable(hero).table
mapper(Hero, hero_table)
for t in metadata.sorted_tables:
print("Table name: ", t.name)
print("t is page_table: ", t is hero_table)
for column in hero_table.columns:
print("Column Table name: ", column.type)
engine = create_engine('sqlite:///:memory:', echo=True)
metadata.bind = engine
metadata.create_all(checkfirst=True)
警告：目前无法处理字典，无类型或列表。这是因为它们都需要某种“关系”＃34;而且你知道人际关系有时很复杂:)。我认为某种递归是需要的。哦，如果你解决了问题，请回答一下这个问题，因为我也试图解决这个问题。
我认为这忽略了功能。我相信它可能会忽略类变量......但是没有经过测试。它仅适用于初始化对象。我希望这对你有用。或者你可以修改这个就足够了。