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Copy pathfields.py
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60 lines (45 loc) · 1.32 KB
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import json
import abc
class Storage:
def __get__(self, obj, cls):
return getattr(obj, self.name)
def __set__(self, obj, value):
setattr(obj, self.name, self)
class Validated(abc.ABC, Storage):
def __set__(self, obj, value):
value = self.validate(obj, value)
super().__set__(obj, value)
@abc.abstractmethod
def validate(self, instance, value):
"""return validated value or raise ValueError"""
@abc.abstractmethod
def formatSQL(self):
"""return value formated for SQL query"""
class StringField(Validated):
def validate(self, instance, value):
if type(value) is not str:
raise ValueError(f"Parameter {self.name} must be string")
self.value = value
return self
def formatSQL(self):
return "'{0}'".format(self.value)
class JSONField(Validated):
def validate(self, instance, value):
self.value = value
return self
def formatSQL(self):
return "'{0}'".format(json.dumps(self.value))
class IntegerField(Validated):
def validate(self, instance, value):
if type(value) is not int:
raise ValueError(f"Parameter {self.name} must be int")
self.value = value
return self
def formatSQL(self):
return str(self.value)
class DateField(Validated):
def validate(self, instance, value):
self.value = value
return self
def formatSQL(self):
return "TO_DATE('{0}','DD/MM/YYYY')".format(self.value)