def _compile_where_or_having(self, conditions):
sqls, params = [], []
for condition in conditions:
if is_array(condition):
condition_len = len(condition)
if condition_len == 1: # 只有一个，表示是一个不带参数的sql
sqls.append(condition[0])
elif condition_len == 2 and isinstance(condition[1], Criteria): # 又是一个criteria
sub_criteria_sql, sub_criteria_params = condition[1].to_sql()
sqls.append('%s (%s)' % (condition[0], sub_criteria_sql))
params += sub_criteria_params
else:
sqls.append(condition[0])
params.extend(condition[1:])
elif is_hash(condition): # 表示是 key:value 的方式, eg. where(name='abc').where(age=1)
for k, v in condition.iteritems():
if v is None:
sqls.append('%s IS NULL' % self._compile_fieldname(k))
elif isinstance(v, Criteria): # 又是一个criteria
sub_criteria_sql, sub_criteria_params = v.to_sql()
sqls.append('%s = (%s)' % (self._compile_fieldname(k), sub_criteria_sql))
params += sub_criteria_params
elif is_array(v):
if v: # 数组里面有元素
sqls.append('%s IN (%s)' % (self._compile_fieldname(k), self._postion_flag(v)))
params.extend(list(v)) # 如果是set，就必须转一下
else:
sqls.append('%s = %s' % (self._compile_fieldname(k), self.__class__.POSITION_FLAG))
params.append(v)
sql = ' AND '.join(sqls)
return sql, params
def _compile_on(self):
sqls, params = [], []
for condition in self.ons:
if is_array(condition):
if len(condition) == 1: # 只有一个，表示是一个不带参数的sql
sqls.append(condition[0])
else:
sqls.append(condition[0])
params.extend(condition[1:])
elif is_hash(condition): # 表示是 key:value 的方式, eg. where(name='abc').where(age=1)
for k, v in condition.iteritems():
if is_array(v):
if v: # 数组里面有元素
sqls.append('%s IN (%s)' % (self._compile_fieldname(k), self._postion_flag(v)))
params.extend(list(v)) # 如果是set，就必须转一下
elif v is None:
sqls.append('%s IS NULL' % self._compile_fieldname(k))
else:
sqls.append('%s = %s' % (self._compile_fieldname(k), self.__class__.POSITION_FLAG))
params.append(v)
sql = ' AND '.join(sqls)
return sql, params
def new(cls, name, value, qutotation, paramstyle):
flag = '__'
vs = name.split(flag)
suffix = vs[-1]
suffix_mapping = cls.mapping()
if suffix in suffix_mapping:
name = flag.join(vs[:-1])
if suffix == 'not':
if value is None:
operator = 'IS NOT'
expression_class = NullFilter
elif is_array(value):
operator = 'NOT IN'
expression_class = InFilter
else:
operator = '<>'
expression_class = SimpleFilter
else:
operator, expression_class = suffix_mapping[suffix]
else:
if value is None:
operator = 'IS'
expression_class = NullFilter
elif is_array(value):
operator = 'IN'
expression_class = InFilter
else:
operator = '='
expression_class = SimpleFilter
expression = expression_class(name, operator, value)
expression.qutotation = qutotation
expression.paramstyle = paramstyle
expression.name = name.replace(flag, '.')
return expression
def valid(self):
if not is_array(self.value) or len(self.value) != 2:
raise TypeError("%s just support a array which has 2 elements" % self.value)
return True
